Encyclopedia

Digital restoration services Digital Restoration Service or DRS are the techniques used to restore/repair film and video clips or individual frames. In the case of new unreleased features, the film reels are digitized from the original camera negative or OCN utilizing the Digital Intermediate process or DI.
Digital revolution The Digital Revolution refers to the sweeping changes brought about by computing and communication technology during the latter half of the 20th Century. Analogous to the Agricultural Revolution and Industrial Revolution, the Digital Revolution marked the beginning of the Information Age.
Digital rights The term "Digital Rights" is indicative of the freedom of individuals to perform actions involving the use of a computer, electronic device, or a communications network. The term is particularly related to a set of actions which would normally be permitted in accordance with the rights of individuals as they exist in any other aspect of life but which have been impacted by a change to digital technology.
Digital room correction Digital room correction (or DRC) is a process in the field of acoustics where digital filters designed to ameliorate unfavorable effects of a room's acoustics are applied to the input of a sound reproduction system. Modern room correction systems produce substantial improvements in the time domain and frequency domain response of the sound reproduction system.
Digital Radio Mondiale Digital Radio Mondiale (DRM) is a set of digital audio broadcasting technologies designed to work over the bands currently used for AM broadcast, particularly shortwave. DRM can fit more channels than AM, at higher quality, into a given amount of bandwidth, using various MPEG-4 codecs.
Digital Reality Digital Reality is an Hungarian video game developer company which originally was founded under the name of Amnesty Design in 1994. Their first game was released to the Commodore Amiga and IBM PC in the same year.
Digital Rights Management Digital Rights Management (generally abbreviated to DRM) is an umbrella term that refers to any of several technologies used by publishers or copyright owners to control access to and usage of digital data or hardware, and to restrictions associated with a specific instance of a digital work or device. The term is often confused with copy protection and technical protection measures; these two terms refer to technologies that control or restrict the use and access of digital content on electronic devices with such technologies installed, acting as components of a DRM design.
Digital scientific echosounder Digital scientific echosounder is a type of scientific echosounder used in hydroacoustic research. In a digital scientific echosounder system, the returned acoustic signal is digitized for improved performance.
Digital sculpting Digital sculpting is the interaction with computer generated geometry such as polygons or pixols as if they were clay or stone. Using tools to push, pull, smooth, grab, pinch and other manipulations of the object as if it were clay.
Digital shift Digital Shift, is a concept explored in the popular anime series Digimon and though seen very little has been explored in Digimon though various forms, card games, video games, tv shows, digivices, etc. Its title varies, however it explores the same concept, that is not to be confuzed with digivolve or any other form of digital evolution/digivolving/evolving/biodigivolving/etc.
Digital signage Digital signage is a form of out-of-home advertising in which content and messages displayed on an electronic screen, or digital sign, can be changed without modification to the physical sign, typically with the goal of delivering targeted messages to specific locations at specific times. Digital signage offers superior return on investment compared to traditional printed signsThe Digital Signage ROI Calculator, digiSignage, 2006.
Digital signature service The OASIS Digital Signature Services (DSS) TC will develop techniques to support the processing of digital signatures. This includes defining an interface for requesting that a web service produce and/or verify a digital signature on a given piece of data and techniques for proving that a signature was created within its key validity period.
Digital single-lens reflex camera A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that operates on the same optical and mechanical principles as a modern electronic autofocus 35mm film single-lens reflex camera. The key difference is that the film is replaced with a CCD or CMOS image sensor plus accompanying electronics, thus creating images digitally in-camera, without the need to first chemically develop a latent image on film.
Digital soil mapping Digital Soil Mapping (DSM) in soil science, or "predictive soil mapping", is the computer-assisted production of digital maps of soil type and soil properties. Digital Soil Mapping involves the creation and population of spatial soil information by the use of field and laboratory observational methods coupled with spatial and non-spatial soil inference systems.
Digital solidarity fund The Digital solidarity fund (DSF) was established following talks which took place during the World Summit on the Information Society in Tunis in 2005. The foundation operates under Swiss law with its headquarters in Geneva Switzerland.
Digital stamp A digital stamp, in mail or philately, is similar to a conventional postage stamp except it is resident on or in a computer. A digital stamp can typically be downloaded and printed onto envelopes or packages by authorized individuals.
Digital subscriber line DSL or xDSL, is a family of technologies that provide digital data transmission over the wires of a local telephone network. DSL originally stood for digital subscriber loop, although in recent years, many have adopted digital subscriber line as a more marketing-friendly term for the most popular version of DSL, ADSL.
Digital subscriber line access multiplexer A Digital Subscriber Line Access Multiplexer (DSLAM) allows telephone lines to make faster connections to the Internet. It is a network device, usually located at a telephone company central office (CO), that connects multiple customer Digital Subscriber Line (DSL)s to a high-speed Internet backbone line using multiplexing techniques.
Digital subtraction angiography Digital Subtraction Angiography (DSA) is the procedure to visualize blood vessels with contrast medium in a bony environment by subtracting the pre-contrast image (the mask) from the image with contrast medium.
Digital sum in base b The digital sum in base b of a set of natural numbers is calculated as follows: express each of the numbers in base b, then take the sum of corresponding digits and discard all carry overs. That is, the digital sum is the same as the normal sum except that no carrying is used.
Digital Satellite Service Digital Satellite Service is the assumed acronym expansion of the DSS digital satellite television transmission system used by DirecTV. Only when digital transmission was introduced did direct broadcast satellite television become popular in North America, which has lead to both DBS and DSS being used interchangeable to refer to all three commonplace digital transmission formats - DSS, DVB-S and 4DTV.
Digital Signal 1 Digital signal 1 (DS1, also known as T1, sometimes "DS-1") is a T-carrier signaling scheme devised by Bell Labs."How Bell Ran in Digital Communications" September 1996, webpage: BYTE-Bell: Bell Labs scientists developed a time-division multiplexing scheme, T1.
Digital Signal Interface Digital Signal Interface (DSI) is a protocol for dimming stage lighting (initially electrical ballasts). It was created in 1991 by Austrian company Tridonic ATCO and is based on Manchester-coded 8-bit protocol, data rate of 1200 baud, 1 start bit, 8 data bits (dimming value), 4 stop bits, and is the basis of the more sophisticated protocol Digital Addressable Lighting Interface (DALI).
Digital Signature Algorithm The Digital Signature Algorithm (DSA) is a United States Federal Government standard or FIPS for digital signatures. It was proposed by the National Institute of Standards and Technology (NIST) in August 1991 for use in their Digital Signature Standard (DSS), specified in FIPS 186 adopted in 1993.
Digital Signature Transponder The Texas Instruments Digital Signature Transponder (DST) is a cryptographically-enabled radio-frequency identification (RFID) device used in a variety of wireless authentication applications. The largest deployments of the DST include the Exxon-Mobil Speedpass payment system (approximately 7 million transponders), as well as a variety of vehicle immobilizer systems used in many late model Ford, Lincoln, Mercury, Toyota, and Nissan vehicles.
Digital Sound System 80 The Digital Sound System 80, short DSS80, was a three-piece PC audio system co-developed by Microsoft and Philips. It debuted on the 1998 Electronic Entertainment Expo (EÂł) and is most likely the only speaker system ever released by the Microsoft Corporation.
Digital Speech Standard Digital Speech Standard (DSS) is a proprietary compressed digital audio format defined by the International Voice Association, a co-operative venture by Olympus, Philips and Grundig. It was originally developed in 1994 by Philips and Grundig with the University of Nuremberg.
Digital Spy Digital Spy (or DS as it is often known by its users) is a leading British media and entertainment website, noted for its extensive Big Brother coverage and forums. The site was established on January 18 1999 when the operations of the digiNEWS network were merged and Digital Spy Ltd was formally incorporated in 2001.
Digital television Digital television (DTV) is a telecommunication system for broadcasting and receiving moving pictures and sound by means of digital signals, in contrast to analog signals in analog (traditional) TV it uses digital modulation data, which is digitally compressed and requires decoding by a specially designed television set or a standard receiver with a set-top box.
Digital television adapter A digital television adapter, (DTA), or digital-to-analog converter (box), is a device that receives, by means of an antenna, a digital television (DTV) transmission, and converts that signal into an analog television signal that can be received and displayed on an analog television.
Digital television in Australia Digital television in Australia commenced on January 1 2001 and uses the DVB-T standard. High definition, however, wasn't required until August 2003, after which time commercial stations had to broadcast at least 1000 hours of high definition content per year.
Digital television radio Digital television radio (or DTR) is an informal term which describes the music channels that are provided with a digital television service. In terms of price and musical variety, DTR falls somewhere between regular AM or FM radio, and satellite radio.
Digital terrestrial television Digital Terrestrial Television (DTTV or DTT) is an implementation of digital technology to provide a greater number of channels and/or better quality of picture and sound through a conventional antenna (or aerial) instead of a satellite dish or cable connection.
Digital terrestrial television in Ireland The deployment of digital terrestrial television in Ireland has had a chequered history, with the first tests being carried out in 1998, but no public trials until August 2006. The system is not expected to fully launch until 2008, although the state is committed to a 2012 Digital switchover date.
Digital terrestrial television in the United Kingdom Digital terrestrial television in the United Kingdom is made up of over fifty primarily free-to-air television channels (including all six non-RSL analogue stations) and over twenty radio channels - primarily from the Freeview branded and Top Up TV services. It is intended that digital terrestrial television will completely replace analogue television in the UK by 2012.
Digital theatre Digital theatre is a hybrid art form, gaining strength from theatre’s ability to facilitate imagination and create human connections, and digital technology’s ability extend the reach of communication and visualization.
Digital transmission group In telecommunication, a digital transmission group is a group of digitized voice or data channels or both with bit streams that are combined into a single digital bit stream for transmission over communications media.
Digital tuner A digital tuner is a tuning device that allows a television or radio set to receive signals via airwaves, satellite, or cable and translates them into a signal the device can display. A tuner is useful for receiving digital broadcasts over the air or via satellite and displaying it on a high definition television or standard definition television digital television set.
Digital Tapeless Digital Tapeless refers to any recording method using digital data recorded to a medium other than audio/videotape. It is popular in sound recording circles using computers or specialized workstations, and has something of a following among video users as well (in particular, among both low-end camcorder users who want the ultimate in light, silent equipment, and among high-end video and film producers doing high definition video at such a high bitrate that tape simply cannot keep up.
Digital Telecommunications Philippines 14%) (2004) Telecommunications Philippines (), commonly known as Digitel, is the second-largest fixed-line and the third-largest mobile telecommunication]s company in the [[Philippines. It is also the company that owns Sun Cellular, the Philippines's fastest-growing mobile phone service.
Digital Theater System DTS (also known as Digital Theater Systems), owned by DTS, Inc. (), is a multi-channel digital surround sound format used for both commercial/theatrical and consumer grade applications (with significant technical differences between home and commercial/theatrical variants: the latter being a traditional ADPCM compression system and the former a sophisticated hybrid perceptual and signal-redundancy compressor based on ADPCM called APTX-100).
Digital Transmission Content Protection DTCP, or Digital Transmission Content Protection, is a controversial Digital rights management technology. The DTCP standard was proposed by the DTLA (Digital Transmission Licensing Administrator) to "protect" multimedia distribution in the Digital Home.
Digital Unicorn Digital Unicorn is a project by Prince Adam (Adam Deibert), former member of The Aquabats, an educated musician, who studied at UCSB as a music major. Digital Unicorn came into existence when the Aquabats' opening band fell apart.
Digital video Digital video is a type of video recording system that works by using a digital, rather than analog, representation of the video signal. This generic term is not to be confused with the name DV, which is a specific type of digital video targeted at the consumer market.
Digital video recorder A digital video recorder (DVR) (or personal video recorder (PVR)) is a device that records video without videotape to a hard drive-based digital storage medium. The term includes stand-alone set-top boxes and software for personal computers which enables video capture and playback to and from disk.
Digital Video Interactive Digital Video Interactive (DVI) was the first multimedia desktop video standard for IBM-compatible personal computers, developed around 1984 by Sarnoff Research Labs (a division of RCA at the time, later a division of General Electric after their purchase of RCA in 1986, and then sold by GE to Intel in 1988).
Digital Visual Interface The Digital Visual Interface (DVI) is a video interface standard designed to maximize the visual quality of digital display devices such as flat panel LCD computer displays and digital projectors. It was developed by an industry consortium, the Digital Display Working Group (DDWG).
Digital watermarking Digital watermarking is a technique which allows an individual to add hidden copyright notices or other verification messages to digital audio, video, or image signals and documents. Such hidden message is a group of bits describing information pertaining to the signal or to the author of the signal (name, place, etc.
Digital window Digital window is a new emerging technology utilizing recent dramatic advances in computing power, storage capacity; HDTV and Dolby surround sound quality to reproduce amazing experience of watching dawn in San Francisco bay, sunset at Niagara Falls or rush hours on Time Square.
Digital Web Magazine Digital Web Magazine (Digital Web) is an online magazine intended for professional web designers, web developers and those who practice Information architecture. The magazine consists primarily of work contributed by web authors, as well as by others who occasionally delve into the web realm.
Digital Witchcraft Digital Witchcraft is a duo of electronic music producers Ned Shepard and Marcus Bacalis. They have released several singles which have met with critical acclaim on labels such as Looq Records and Proton Music.
Digital World The Digital World is a fictional universe featured in the Digimon media franchise. In Digimon anime, manga, video games, and other related merchandise, the Digital World (or DigiWorld for short) is a parallel universe to Earth that is made from computer data originating in Earth's communications networks.
Digital X-ray Increasingly used in dental radiography, digital X-ray systems use normal X-ray but new types of sensors (the part inside the mouth that detects the X-rays), instead of the photographic film used in traditional system. Advantages are fast (no developing needed) and digital (can be emailed, compared, enhanced, etc.
Digital zoom Digital zoom is a method of increasing the apparent focal length at which a photographic or video image was produced. Digital zoom is accomplished by cropping an image down to a centered area with the same aspect ratio as the original, and usually also interpolating the result back up to the pixel dimensions of the original.
Digital-to-analog converter In electronics, a digital-to-analog converter (DAC or D-to-A) is a device for converting a digital (usually binary) code to an analog signal (current, voltage or electric charge). Digital-to-analog converters are interfaces between the abstract digital world and analog real life.
Digital+ Digital+ is a Spanish satellite platform who offers a variety of channels, national and international and pay per view films and football, known as "Taquilla". It is a subdivision of Sogecable, and was founded in July 23,2003 as a result of the merger of Via Digital (owned by TelefĂłnica) and Canal Satellite Digital (owned by Sociedad de Television Canal Plus S.
Digitalis Digitalis is a genus of about 20 species of herbaceous biennials, perennials and shrubs that was traditionally placed in the figwort family Scrophulariaceae. Due to new genetic research, it has now been placed in the much enlarged family Plantaginaceae.
Digitek Digitek was an early system software company located in Los Angeles, CA. Founded in the early 1960's, Digitek authored many of the programming language compilers found on various manufacturers' computer systems, including IBM, SDS, GE, Bell Labs, and many others.
Digitek (comics) Digitek (Jonathan Bryant) is a fictional hero published by Marvel UK and later by Marvel Comics itself. He first appeared in Digitek #1 (December 1992), and was created by writers John Tomlinson & Andy Lanning and artist Dermot Power.
Digitel Digitel is the 2nd largest mobile phone operator in Venezuela, the company has pioneered GSM technology in that country. The company was recently purchased by Oswaldo Cisneros, one of Venezuela's wealthies men.
Digitiser Digitiser (not to be confused with a digitizer) was a video games magazine that was broadcast on the Teletext service on Channel 4 in the UK from 1993 to 2003, and (save for nine months during 2002 when it went to three days a week, weekends and holidays) was updated daily. During those ten years, it gained a cult following of up to 1.
Digitizing Digitizing or digitization is representing an object, an image, or a signal (usually an analog signal) by a discrete set of its points or samples. The result is called "digital representation" or, more specifically, a "digital image", for the object, and "digital form", for the signal.
Digitographer A digitographer, or digital imaging technician, works in collaboration with a cinematographer on work flow, systemization, signal integrity and image manipulation, to achieve the highest image quality and creative goals of cinematography in the digital realm.
Digitonal Digitonal is a musical group which utilises European classical music instruments in combination with electronic music. It comprises of Andy Dobson, who is responsible for producing the majority of the music, with assistance from violinist Samy Bishai and drummer Callum MacMillan.
Digitrax Digitrax is a company that makes Digital Command Control systems and accessories for model railroaders. This company is currently headquartered in Norcross, Georgia and has been in the DCC field since the 1980's.
DigiTimes DigiTimes was established in 1998 as an information source for readers wanting to know about the semiconductor, electronics, computer and communications industries in Taiwan and the Greater China region. The company is based in Taipei, Taiwan and currently has a daily newspaper in traditional Chinese as well as Chinese- and English-language websites.
DigiTools DigiTools is a freeware multi-purpose software application productivity suite for Mac OS X, which combines word processing, movie playback, image viewing, font browsing and other useful tools together. Development was started in December 2003 by high school student Joshua Coventry, and was in early beta stage by the next month; on August 24, 2004 version 1.
Digivolution Digivolution is a fictional term used in the Digimon: Digital Monsters anime series. It is a process used by Digimon, monsters that inhabit a parallel universe called the Digital World that spawned from Earth's communication networks.
Digiweb Digiweb are an Irish telecommunications provider, based in Dundalk, offering various broadband, Internet service provider and telephony services in the Republic of Ireland, United Kingdom, France, Germany and Italy. The company also sell software products in the United States.
Diglossia In linguistics, diglossia is a situation where, in a given society, there are two (often) closely-related languages, one of high prestige, which is generally used by the government and in formal texts, and one of low prestige, which is usually the spoken vernacular tongue. The high-prestige language tends to be the more formalised, and its forms and vocabulary often 'filter down' into the vernacular, though often in a changed form.
Diglossia in the Philippines There is still doubt whether there is diglossia in the Philippines, considering that there is actually not a clear definition whether Tagalog and Filipino are two distinct languages. However, there are some shades of diglossia in the provinces, especially in areas where Tagalog is not an arterial language to the major populace.
Digne-les-Bains Digne-les-Bains or simply and historically Digne (Occitan: Dinha in classical norm or Digno in Mistralian norm) is a commune of France, préfecture (capital) of the Alpes-de-Haute-Provence département. Population (1999): 16,064.
Dignitas International Dignitas International is a medical humanitarian organization working with communities to dramatically increase access to life-saving treatment and prevention in areas overwhelmed by HIV/AIDS. Founded by a group of international health and research experts, Dignitas International is led by Dr.
Dignitas LSE Founded in 2006, Dignitas LSE (London School of Economics & Political Science) is a student chapter of Dignitas International and seeks to raise awareness of issues surrounding the HIV/AIDS epidemic. Despite the developmental pains of starting a new student society, Dignitas has managed to secure a membership of 108 and has held widely attended HIV/AIDS awareness and fundraising events (including a discussion on community based care with James Fraser - Executive Director of Dignitas International).
Dignitatis Humanae Dignitatis Humanæ is the Second Vatican Council's Declaration on Religious Freedom.The full text in English is available from the Holy See's website The document's title, "Of the Dignity of the Human Person" in Latin, is the incipit that begins the document's first line, as is customary with Roman Catholic documents.
Dignity Battalions The Dignity Battalions were paramilitary combatants under the Manuel Noriega Regime in Panama in the 1980s to suppress dissent and terrorize the opposition. They carried out arrests, torture and murder of political opponents, but were disbanded after the U.
Dignity for Disabled Dignity for Disabled are a minority political party who first ran at the South Australian 2006 state elections with no successful candidates. Candidates were fielded in the lower house seats of Unley, Mitchell, Mawson, Norwood, Hartley, Newland, Morialta, Bright, Adelaide, and Wright, and fielded four candidates in the upper house.
Digo The Digo are an ethnic and linguistic group based near the Indian Ocean coast between Mombasa in southern Kenya and Tanga in northern Tanzania. In 1994 the Digo population was estimated to total 305,000, with 217,000 ethnic Digo living in Kenya and 88,000 (1987 estimate) in Tanzania Digo people speak the Digo language], called Chidigo by speakers, a [[Bantu language.
Digo language Digo (Chidigo) is a Bantu language spoken primarily along the East African coast between Mombasa and Tanga by the Digo people of Kenya and Tanzania. The ethnic Digo population has been estimated at around 360,000 (Mwalonya et al.
Digraph (computing) Digraphs are two-character sequences used to enter single conceptual characters that cannot be entered from the computer keyboard for various reasons: obsolete keyboard, input of special characters is required, the text editor reserves some characters for special use, etc. Digraphs can also be used to extend the keyboard.
Digraph (orthography) A digraph, bigraph or digram is a pair of letters used to write one sound or a sequence of sounds that does not correspond to the written letters combined. This is often, but not necessarily, a sound which cannot be expressed using a single letter in the alphabet used for writing.
Digression Digression (parekbasis in greek, egressio, digressio and excursion in latin) is a section of a composition or speech that is an intentional change of subject. In Classical rhetoric since Corax of Syracuse, especially in Institutio Oratoria of Quintilian, the digression was a regular part of any oration or composition.
Digvijay Singh Digvijay Singh is a senior Congress (I) politician in India and has been the Chief Minister of Madhya Pradesh state for two five-year terms. He was born on February 28, 1947 in the royal family of Raghogarh principality, in Guna district of Madhya Pradesh.
DiGi DiGi Telecommunication is a mobile phone service provider in Malaysia using the dialling codes of "016, 014-32, 014-35, 014-30, 014-31 and 014-6". It is owned in majority by Telenor ASA of Norway and with Berjaya Group as a minority stakeholder.
Dih Bala District Dih Bala (Persian: ده بالا) is a district in the south of Nangarhar Province, Afghanistan, bordering on Pakistan. Its population, which is 100% Pashtun, was estimated at 50,595 in 2002, of whom 20,200 were children under 12.
Dihairesis According to Epictetus, Dihairesis is the second-power Judgement, or Superjudgement, capable of distinguishing, among ordinary judgements about any situation, what is subject to our exclusive power and what is not subject to our exclusive power.
Dihdadi The Dihdadi district (pop:47 000)is situated in the central part of Balkh province in Northern Afghanistan.It is not far from the capital of the province Mazari Sharif-about 15 km in eastern direction from the district capital Dihdadi(also Dehdadi).
Dihedral group In mathematics, the dihedral group of order 2n is the abstract group of which one representation is the symmetry group in 2D of a regular polygon with n sides. The group consists of n elements corresponding to rotations of the polygon, and n corresponding to reflections.
Dihedral prime A dihedral prime or dihedral calculator prime is a prime number that still reads like itself or another prime number when read in a seven-segment display, regardless of orientation (normally or upside down), and surface (actual display or reflection on a mirror). The first few base 10 dihedral primes are
Dihika Dihika, a small hamlet in West Bengal, India, was made famous by Sri Sri Paramahansa Yogananda who had landed here way back in 1917 for setting up a "How-to-Live" school with only 7 students and a couple of teachers. The school, housed in a one-storey building on the brink of a small pond, was inaugurated on 22nd March, 1917 with the financial assistance of Sri Manindra Chandra Nandi, the then Maharaja of Kashimbazar.
Dihun Dihun is one of the 47 woredas in the Somali Region of Ethiopia. Part of the Fiq Zone, Dihun is bordered on the south by the Gode Zone, on the west by the Shebelle River which separates it from the Oromia Region, on the northwest by Hamero, on the northeast by Segeg, and on the east by the Degehabur Zone.
Dihybrid cross A dihybrid cross is a cross in which two hybrids are mated to test for dominant genes and recessive genes in two separate characteristics, and such a cross has a variety of uses in Mendelian genetics and genetic linkage experiments. The dihybrid genotype is usually created when two different parental individuals that are true breeding (homozygous) for different alleles of two genes are sexually crossed or mated together. Their resulting progeny possesses the "dihybrid" genotype and is heterozygous for alleles of two genes. The dihybrid is also often referred to as the double heterozygote. When two dihybrids with the same genotype are mated together, the mating is referred to as a dihybrid cross.
Dihydrogen bond In chemistry, a dihydrogen bond is a kind of hydrogen bond, an interaction between a metal hydride bond and an OH or NH group or another proton donor. The first example of this phenomenon is credited to Brown and Heseltine.
Dihydrolipoyl transacetylase Dihydrolipoyl transacetylase (or dihydrolipoamide acetyltransferase) is the structural and catalytic core of the multienzyme pyruvate dehydrogenase complex, playing a crucial role in the architecture of the complex. All dihydrolipoyl transacetylases have a unique multidomain structure consisting of (from N to C); 3 lipoyl domains; and interaction domain; and the catalytic domain (see the domain architecture at Pfam).
Dihydromorphine Dihydromorphine (Paramorfan, DHM, Paramorphan) is a semi-synthetic opioid invented in Germany in the first years of the twentieth century. Structurally, it is very similar to morphine—the only difference being the reduction of the double bond between positions 7 and 8 in morphine to a single bond.
Dihydropyrimidine dehydrogenase deficiency Dihydropyrimidine dehydrogenase deficiency (DPD deficiency) is a condition in which there is absent or significantly decreased activity of dihydropyrimidine dehydrogenase. Individuals with this condition may develop life-threatening toxicity following exposure to 5-fluorouracil (5-FU), a chemotherapy drug that is used in the treatment of cancer.
Dihydrotestosterone Dihydrotestosterone (DHT) (Full name: 5α-Dihydrotestosterone, abbreviating to 5α-DHT; INN: androstanolone) is a biologically active metabolite of the hormone testosterone, formed primarily in the prostate gland, testes, hair follicles, and adrenal glands by the enzyme 5α-reductase by means of reducing the 4,5 double-bond. Dihydrotestosterone belongs to the class of compounds called androgens, also commonly called androgenic hormones or testoids.
Dihydroxyacetone Dihydroxyacetone (also known as DHA) is a simple carbohydrate that is primarily used as an ingredient in sunless tanning products. It is often derived from plant sources such as sugar beets and sugar cane, by the fermentation of glycerin.
Dihydroxyacetone phosphate Dihydroxyacetone phosphate (DHAP) is a biochemical compound involved in many reactions, from the Calvin cycle in plants to the ether-lipid biosynthesis process in Leishmania mexicana. Its major biochemical role is in the glycolysis metabolic pathway.
Dichelostemma Dichelostemma is a genus of seven species of flowering plants in the order Asparagales. The genus is native to the western United States, especially in northern California, but also east to Utah and north to Oregon.

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