Encyclopedia

Acidophile (histology) An acidophile (or acidophil, or, as an adjectival form, acidophilic) describes is a term used by histologists to describe a particular staining pattern of cells and tissues when using haematoxylin and eosin stains. Specifically, the name refers to structures which "love" acid, and take it up readily.
AcidWarp AcidWarp is a 2D demo originally written for DOS in 1992 by Noah Spurrier and Mark Bilk. It periodically generated over 40 different patterns on the fly by plotting 2D mathematical formulas, and then animated them through palette rotation.
Acinaces The acinaces, also spelled akinakes (Greek ἀκινάκης) or akinaka (unattested Old Persian *akīnakah) is a type of sword or dagger used by the Ancient Persians. The design is of Scythian origin, but was made famous by the Persians, and rapidly spread around the old world (its influence can even be seen in the design of Chinese weapons).
Acinos Acinos is a genus of ten species of annual and short-lived evergreen perennial woody plants native to southern Europe and western Asia. Its name comes from the Greek word akinos, the name of a small aromatic plant.
Acis and Galatea Acis and Galatea is a "pastoral opera" or masque composed by George Frideric Handel while he was living in Cannons (the seat of James Brydges, 1st Duke of Chandos, during the summer of 1718, to words by John Gay, Alexander Pope, and John Hughes, who borrowed freely from John Dryden's English translation of Ovid published in 1717, The Story of Acis, Polyphemus and Galatea. In 1732 Handel revised and expanded it to three acts.
Acis et Galatée Acis et Galatée (Acis and Galatea) is an opera by Jean-Baptiste Lully. Unlike most of his operas, which are designated tragédies en musique, Lully called this work a pastorale-héroïque, because it was on a pastoral theme and had only three acts (plus a prologue) compared to the usual five.
Acislo Antonio Palomino de Castro y Velasco Acislo Antonio Palomino de Castro y Velasco (1653-1726), Spanish painter and writer on art, was born of good family at Bujalance, near Córdoba, in 1653, and studied philosophy, theology and law at Córdoba, receiving also lessons in painting from Juan de Valdés Leal, who visited there in 1672, and afterwards from Juan de Alfaro y Gómez (1675).
Ack Ack Ack Ack "Ack Ack Ack Ack"' (sometimes known as "Ack Ack Ack") is a song by early American punk band The Urinals. It appeared on their second record, Another EP, and can be found on the compilation CD Negative Capability...
Ack Ack Handicap The Ack Ack Handicap is a Grade III race for Thoroughbred horses run at Churchill Downs in the fall. In 2006, because Churchill was hosting the Breeders' Cup races, the Ack Ack was run on the same card on the same day.
Ackee The Ackee or Akee (Blighia sapida) is a member of the Sapindaceae (soapberry family), native to tropical West Africa in Cameroon, Gabon, Sao Tome and Principe, Benin, Burkina Faso, Cote D'Ivoire, Ghana, Guinea, Guinea-Bissau, Mali, Nigeria, Senegal, Sierra Leone and Togo .
Ackerley Group The Ackerley Group was an American media company that owned several television stations (mainly in New York State, California, as well as one in Fairbanks) that was taken over by Clear Channel Communications in 2001.
Ackerman syndrome Ackerman syndrome is a familial syndrome of fused molar roots with a single canal (taurodontism), hypotrichosis, full upper lip without a cupid’s bow, thickened and wide philtrum, and occasional juvenile glaucoma.
Ackermania Ackermania is a genus in the orchid family (Orchidaceae), classified in the subfamily Epidendroideae, tribe Maxillarieae, subtribe Zygopetalinae. This newly created genus, in alliance with Chondrorhyncha, is named after James Ackerman, an American orchid taxonomist.
Ackermann function In computability theory, the Ackermann function or Ackermann-PĂ©ter function is a simple example of a computable function that is not primitive recursive. It takes two natural numbers as arguments and yields another natural number.
Ackermann steering geometry Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii.
Ackersdijk en Vrouwenregt Ackersdijk en Vrouwenregt is a former municipality in the Dutch province of South Holland, located about halfway between Delft and Schiedam. It existed from 1817 to 1855, when it was joined to the municipality of Vrijenban.
Acklam Acklam was a village in the North Riding of Yorkshire in England. It was incorporated into the County Borough of Middlesbrough during the early 1900s and is now part of the town of Middlesbrough in the borough of Middlesbrough and the ceremonial county of North Yorkshire.
Ackley Improved Ackley Improved (designated AI) rifle cartridges are commercially available cartridges that are "improved" by firing in the AI chamber. The AI version has less case body taper and a sharper (usually 40 degree) shoulder, giving the cartdrige case more powder capacity, thus improving it's performance.
Acknowledgement of receipt Acknowledgement of receipt (equivalent terms include avis de réception, advice of delivery, return receipt requested/required/wanted/demanded, ..., Rückschein, ricevuto di ritorno, and many others; the standard abbreviations are AR and AD) is a postal service which returns to the sender of a letter (usually registered; in the case of a parcel, it may be insured) a form or card signed by the recipient.
Acknowledgement window size Acknowledgement window size is a small, variable number of bits that count the length of each acknowledgement segment in response to one full burst of wireless connection packets received from a sending entity per connection.
Acknowledgment (law) In law, an acknowledgment is a declaration or avowal of one's own act, to give it legal validity; as, the acknowledgment of a deed before a proper officer. The term also refers to the certificate of the officer attesting such declaration.
Acknowledgment index An acknowledgment index is an experimental method for analyzing the scientific literature; it quantifies the acknowledgements in scientific journals. Typically, such an article has a section where the authors acknowledge funding, technical staff, and colleagues that have contributed materials or knowledge.
Ackworth, West Yorkshire Ackworth is a village in the metropolitan borough of Wakefield, West Yorkshire, England, situated between Pontefract, Barnsley and Doncaster on the small River Went. According to the 2001 census it had a population of 6,493.
Acla Acla was a Spanish colonial town founded by order of the Governor of Castilla de Oro, Pedrarias Dávila, in 1515. It was located on the central coastline of the modern-day Kuna Yala, to the northeast of Panamá.
Aclare Aclare (Áth an Chláir in Irish) is a village in County Sligo, Republic of Ireland, and the main village in the parish of Tourlestrane. It straddles the border of the townlands of Lislea and Carns and is situated on the Inagh (also spelt "Eignagh") river, a tributary of the Moy.
Acle Acle is a small market town on the River Bure in Norfolk within The Broads National Park. It is located halfway between Norwich and Great Yarmouth and has the only bridge across the River Bure between Wroxham and Great Yarmouth.
Acme (computer virus) Acme is a computer virus which infects EXE files. Each time an infected file is executed, Acme may infect an EXE in the current directory by creating a hidden 247 byte long read-only COM file with the same base name.
Acme Corporation The Acme Corporation is a fictional corporation that exists in the Looney Tunes universe. It made its first appearance in a Buddy cartoon (Buddy's Bug Hunt), and it also appeared in the Egghead cartoon Count Me Out in which Egghead purchases a "Learn How To Box" kit from Acme.
Acme Group Acme Group or Acme Associates is a fake company in Stockholm, Sweden that claims to provide different financial services including banking and saving. The company "went bankrupt" and the owners dissapeared with all the money the bank was storing.
Acme Novelty Library Acme Novelty Library is a singular and artistically adventurous comic book created by Chicago cartoonist Chris Ware and published by Fantagraphics Books. It is considered a significant work in alternative comics.
Acme Records Acme Records, an independent record label based in Hastings, East Sussex, England, was formed in 1994 by Gary Ramon (the frontman of Sun Dial). It is known for reissuing classic prog rock and psychedelic rock albums from the 1960s and 1970s, including out-of-print and previously unreleased material.
Acme Sierra The Acme S-1 Sierra was an experimental aircraft of unusual configuration built in the US in 1948 to investigate the advantages of a pusher propeller configuration. Apart from this engine installation, the aircraft was unusual in having an X-shaped tail incorporating ruddervators on the upper fins.
Acme thread form Threads formed around a shaft are used to translate rotational motion into linear motion. In this way fasteners such as screws and bolts convert the rotational motion or torque of a screwdriver or wrench into a compressional holding force.
Acne Jeans Acne Jeans is a Swedish denim manufacturer and part of the Stockholm-based design firm ACNE. The denim offshoot began in 1997 when it designed 100 pairs of jeans to distribute to friends, family, and clients of the company, and its first collection was released the following year.
Acocil Acocil is the name for either of two species of freshwater crayfish endemic to Mexico - Cambarellus montezumae and Cambarellus zempoalensis. The former species is widespread in ponds, lakes, lagoons and reservoirs, including, for example, the Guadalupe Victoria dam; the latter is known only from its type locality, the Lagunas de Zempoala in the State of Morelos.
Acoelomorpha The Acoelomorpha are a phylum of animals formerly considered to be in Platyhelmintha, but recently classified by Jaume Baguñà and Marta Riutort as a separate phylum, basal among the Bilateria. The Acoela are very small flatworms that do not have a gut.
Acoemetae Acoemetae (or "Acoemeti") was an order of monks in the 5th century, who by turns, kept up a divine service day and night. The order was founded about the year 400, by one Alexander, a man of noble birth, who fled from the court of Byzantium to the desert, both from love of solitude and fear of episcopal honours.
Acokanthera venenata Acokanthera venenata is a shrub used as the source of an arrow poison and to coat caltrops made from the sharp fruits of the puncture vine (Tribulus terrestris). All three plants of the genus Acokanthera contain toxic cardiac glycosides strong enough to cause death.
Acol, Kent Acol (formerly Acholt) is a village in the English county of Kent. Located about 1½ miles south of Birchington, close to the Western end of the runway at Manston Airport, it is one of the smallest communities in Kent.
Acolouthia Acolouthia, (from the Greek akoloutheo, to follow) in ecclesiastical terminology signifies the order or arrangement of the Divine Office (perhaps because the parts are closely connected and follow in order) and also, in a wide sense, the Office itself. The Acolouthia is composed of musical and rhetorical elements, the first usually given in the musical mode or tone (Echos), according to which the liturgical compositions are chanted.
Acolytes (comics) The Acolytes is a team of comic book mutant supervillains in the Marvel Comics' universe. The Acolytes followed the principles of the mutant Magneto, particularly the mutant right of superiority over normal humans.
Acomb Stakes The Acomb Stakes is a Group 3 flat horse race in the United Kingdom for two-year-old thoroughbreds run over a distance of 7 furlongs (1,408 metres) at York Racecourse during the Ebor Festival meeting in August.
Aconcagua River The Aconcagua River rises on the southern slope of the mountain Aconcagua, flows eastward through a broad valley, or bay in the mountains, and enters the Pacific 20 km north of ValparaĂ­so, Chile. The river has a course of about 320 km (200 mi), and its waters irrigate the most populous sections of the Chilean provinces of San Felipe de Aconcagua Province and Los Andes.
Aconitine Aconitine is a highly poisonous alkaloid derived from the aconite plant. It is a neurotoxin that opens TTX-sensitive Na+ channels in the heart and other tissues, and is used for creating models of cardiac arrhythmia.
Acontias percivali Acontias percivali, also known as Percival's legless lizard, Tanzanian legless lizard, and the Percival's Lance Skink is a small, legless species of skink from Namibia, Botswana, Zimbabwe, South Africa, Kenya, Angola, and Tanzania. It inhabits savannas by burrowing just below the surface of the soil.
Acontius Acontius (Gr. Akontios), was in Greek mythology a beautiful youth of the island of Ceos, the hero of a love-story told by Callimachus in a poem now lost, which forms the subject of two of Ovid's Heroides (xx, xxi).
Acoreus Acoreus was the name of a wise man consulted by Julius Caesar, according to the Roman writer Lucan, asking him many questions about ancient Egypt’s history and its calendar. Caesar learned that the Egyptians based their year on the solar year, that is, on the apparent motion of the Sun through all of the zodiacal constellations, and that the Egyptians knew that such a year averaged 365 1/4 days.
Acorn The acorn is the fruit of the oak tree (genera Quercus, Lithocarpus and Cyclobalanopsis, in the family Fagaceae). It is a nut, containing a single seed (rarely two seeds), enclosed in a tough, leathery shell, and borne in a cup-shaped cupule.
Acorn Antiques Acorn Antiques is a parodic soap opera written by Victoria Wood as a regular feature in the two seasons of Victoria Wood - As Seen On TV, which ran from 1985 to 1987. It was progressed into a musical, by Wood, in 2005.
Acorn Archimedes The Acorn Archimedes was Acorn Computers Ltd's first general purpose home computer based on their own 32-bit ARM RISC CPU. The name is also commonly used to describe computers which were based on the same architecture, even where Acorn did not include 'Archimedes' in the official name.
Acorn Community Acorn Community is a medium sized egalitarian, intentional community located in rural Virginia, USA and is a member of the Federation of Egalitarian Communities. Acorn was started in 1993 as a daughter community of the older, larger Twin Oaks.
Acorn Electron The Acorn Electron was a budget version of the BBC Micro educational/home computer made by Acorn Computers Ltd. It had 32 kilobytes of RAM, and its ROM memory included BBC BASIC along with its operating system.
Acorn Green Acorn Green was a children's comic book series in the mid-1980s based around a community of woodland creatures, all of whom had different jobs to play in the wood, for instance policeman, nurse, fireman and postman.
Acorn Network Computer The Acorn Network Computer was a network computer designed and manufactured by Acorn Computers Ltd. It was the implementation of the Reference Standard that Oracle Corporation commissioned Acorn to specify for network computers.
Acorn System 1 The Acorn System 1, initially called the Acorn Microcomputer (Micro-Computer), was an early 8-bit microcomputer for hobbyists, based on the MOS 6502 CPU, and produced by British company Acorn Computers from 1979.
Acorn to Oak - LDS University in Argentina The Acorn to Oak (or Bellota A Roble) project was started on March 24, 2006 to ultimately establish a private, Latter-day Saint university in Latin America. The project derives its name from a statement given by Melvin J.
Acornsoft Acornsoft was the software arm of Acorn Computers Ltd, and was a major publisher of software for the BBC Micro and Acorn Electron. As well as games, they also produced a large number of educational titles, extra computer languages and business and utility packages - these included ROM-based word processor VIEW and the spreadsheet Acornsoft ViewSheet which Acorn supplied on ROM chips/cartridges for the BBC Micro/Acorn Electron and included as standard in the BBC Master and Acorn Business Computer.
Acorus Acorus is a genus of monocot flowering plants. This genus was once placed within the family Araceae (aroids), but more recent phylogenies place it in its own family Acoraceae and order Acorales, of which it is the sole genus of the oldest surviving line of monocots.
Acosmism Acosmism, in contrast to pantheism, denies the reality of the universe, seeing it as ultimately illusory, (the prefix "a-" in Greek meaning negation; like "un-" in English), and only the infinite unmanifest Absolute as real.
Acouchy The acouchies (genus Myoprocta) are rodents belonging to the Dasyproctidae family. They are generally smaller than the common agoutis and have a very short tail (5 to 7 cm), while the common agoutis lack a tail.
Acousmatic music Acousmatic music is a specialised sub-set of electroacoustic music. It is created using non-acoustic technology, exists only in recorded form in a fixed medium, and is composed specifically to be heard over loudspeakers.
Acoustic approximation A fundamental principle in the field of acoustics, the acoustic approximation states that an acoustic wave is created by a small pressure ripple riding on a comparitively large equilibrium (bias) pressure. Typically, the acoustic pressure is on the order of a few ppm of the equilibrium pressure.
Acoustic cleaning Acoustic cleaning is used wherever there is a build up of dry materials and particulates which need to be cleaned regularly to ensure maximum efficiency and minimize maintenance and down time. An acoustic cleaner works by generating powerful sound waves which will vibrate the dry materials differently to each other and the surrounding structures.
Acoustic contrast factor The acoustic contrast factor is a number used to describe the relationship between the densities and the sound velocities (or, equivalently because of the form of the expression, the densities and compressibilities) of two media. It is most often used in the context of biomedical ultrasonic imaging techniques using acoustic contrast agents and in the field of ultrasonic manipulation of particles much smaller than the wavelength using ultrasonic standing waves.
Acoustic CD/DVD Bayside's release features a ten-song acoustic EP and DVD footage of Bayside's acoustic set on the Never Sleep Again Tour 2005, at the House of Blues, Chicago. The DVD also features a "making of" the album video and a John "Beatz" Holohan montage segment, who was killed in a car crash on October 31, 2005.
Acoustic Control Corporation Acoustic Control Corporation was a manufacturer of instrument amplifiers, founded started by Steve Marks (with the help of his father) and based in Van Nuys, California. Its original location was a shack on Sunset Boulevard in Los Angeles, California.
Acoustic emission testing Acoustic Emission (AE) is a naturally occurring phenomenon whereby external stimuli such as mechanical loading generate sources of elastic waves. AE occurs when a small surface displacement of a material is produced.
Acoustic holography Acoustic holography is a method used to estimate the sound field near a source by measuring acoustic parameters away from the source via an array of pressure and/or particle velocity transducers. Measuring techniques included within acoustic holography are becoming increasingly popular in various fields, most notably those of transportation, vehicle and aircraft design, and NVH.
Acoustic impedance The acoustic impedance Z (or sound impedance) is the ratio of sound pressure p to particle velocity v in a medium or acoustic component. Alternatively, it is the product of the longitudinal wave velocity and the density of the medium.
Acoustic instrument An acoustic instrument is a musical instrument which does not produce sound using electronics, as does an electronic musical instrument. Electric instruments include both electronic instruments and electrically amplified acoustic instruments.
Acoustic junction The jam band Acoustic Junction was formed in Boulder, CO in 1989 by singer/guitarist Reed Foehl. Although the group endured endless lineup changes in the years that followed, other mainstays of the roster included multi-instrumentalist Tim Roper, bassist Curtis Thompson and drummer Matt Coconis.
Acoustic levitation Acoustic levitation is a method for suspending matter in a fluid by using acoustic radiation pressure from intense sound waves in the fluid. Acoustic levitation is possible because of the non-linear effects of intense sound waves.
Acoustic location Acoustic location is the art and science of using sound to determine the distance and direction of something. This can be done actively or passively, and can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).
Acoustic lubrication Acoustic or sonic lubrication occurs when sound (measurable in a vacuum by placing a microphone on one element of the sliding system) permits vibration to introduce separation between the sliding faces. This could happen between two plates or between a series of particles.
Acoustic Ladyland Acoustic Ladyland are a London based jazz band consisting of Tom Herbert on double bass, Pete Wareham on tenor and baritone saxophone, Seb Rochford on drums and Tom Cawley on Piano. They are part of the F-IRE Collective.
Acoustic Live Acoustic Live is a live album released by English synthpop duo Erasure in 2006. It is a double-CD set that is a recording of a concert appearance performed on 19 April 2006 at the Shepherds Bush Empire in London.
Acoustic Live in Newcastle Acoustic Live in Newcastle is the second live album released by Sting. It was recorded and released shortly after the studio album The Soul Cages, at the Buddle Arts Centre in Newcastle upon Tyne, England, on April 20, 1991.
Acoustic metric In mathematical physics, a metric describes the arrangement of relative distances within a surface or volume, usually measured by signals passing through the region – essentially describing the intrinsic geometry of the region. An acoustic metric will describe the signal-carrying properties characteristic of a given particulate medium in acoustics, or in fluid dynamics.
Acoustic mine An acoustic mine is a type of naval mine which monitors audio activity in its vicinity. Depending on its design, it will either actively send out audio pulses, not unlike a sonar, listening to the speed at which the echo returns to it or passively listen to its environment, depending only on the noise that is made without its interference.
Acoustic music Acoustic music can refer to music that solely or primarily uses acoustic instruments, such as the acoustic guitar, banjo, mandolin, piano, cello, and voice. The category includes much contemporary folk and singer-songwriter music, as well as bluegrass music.
Acoustic phonetics Acoustic phonetics is a subfield of phonetics which deals with acoustic aspects of speech sounds. Acoustic phonetics investigates properties like the mean squared amplitude of a waveform, its duration, its fundamental frequency, or other properties of its frequency spectrum, and the relationship of these properties to other branches of phonetics (e.
Acoustic radiation pressure Acoustic radiation pressure is the difference between the average pressure at a surface moving with the sound displacements (the Lagrangian pressure) and the pressure that would have existed in the fluid of same mean density at rest.
Acoustic resonance Acoustic resonance is the tendency of an acoustic system to absorb more energy when the frequency of its oscillations matches the system's natural frequency of vibration (its resonant frequency) than it does at other frequencies.
Acoustic rock Acoustic rock, in the simplest terms, is rock music played on unamplified instruments, typically featuring acoustic guitar, drums, and vocals. Its appeal lies in that it comes across as more down to earth with its natural, simple and personal sound.
Acoustic Research Acoustic Research is a brand of Hi-Fi loudspeakers formerly produced by Acoustic Research Corporation of Massachusetts and now by Audiovox electronics company. AR is well-known for the AR-3 loudspeaker, which utilized the 12" Acoustic Suspension woofer of the AR-1, and incorporated newly designed dome midrange and high frequency devices.
Acoustic scale In music the acoustic scale is a seven note scale, containing the musical notes: C, D, E, F#, G, A and Bb, which is formed from a major triad (C E G) with an added minor seventh and raised fourth (Bb and F#, drawn from the overtone series) and major second and major sixth (D and A) (Wilson 1992, p.7).
Acoustic shadow An acoustic shadow is an area through which sound waves fail to propagate, due to topographical obstructions or disruption of the waves via phenomena such as wind currents. For example, at the Battle of Iuka, a northerly wind prevented General Ulysses S.
Acoustic source localization Acoustic source localization is the task of locating a sound source given measurements of the sound field at several disparate locations. Microphone arrays are typically employed for the sampling of the spatial sound field.
Acoustic tags Acoustic tags are small sound-emitting devices that allow the remote tracking of fish in three dimensions. Commonly used to monitor the behavior of fish, studies are conducted in lakes, rivers, tributaries, estuaries and at sea.
Acoustic thermometry Acoustic Thermometry of Ocean Climate (ATOC) is an idea to observe the state of the world's oceans, and the ocean climate in particular, using long-range acoustic transmissions. Prototype measurements of temperature have been made in the North Pacific Basin and across the Arctic Basin.
Acoustic torpedo An acoustic torpedo is a torpedo designed for medium-range use, often fired from a submarine. In general, acoustic torpedoes are equipped with a mid-grade acoustic sensor designed either to detect the sound of churning water from a moving vessel, or actively to locate targets using SONAR.
Acoustical measurements and instrumentation Analysis of sound and acoustics plays a role in such engineering tasks as product design, production test, machine performance, and process control. For instance, product design can require modification of sound level or noise for compliance with standards from ANSI, IEC, and ISO.
Acoustically Navigated Geological Underwater Survey The Acoustically Navigated Geological Underwater Survey (ANGUS) is a deep-towed still camera sled operated by Woods Hole Oceanographic Institute. It is capable of remaining in the deep ocean for 12 to 14 hours at a time, and can take up to 16,000 photographs in one lowering.
Acousticophilia Acousticophilia is a form of paraphilia where sexual arousal is derived from sounds like music, poems or foreign-language chitchat. People with this condition usually have a specific interest, such as female Japanese conversation.
Acoustics (album) Acoustics was an album released by Floater in August 2004. Refusing to settle for covering their electric songs, the band brings new tales that are accompanied not only by the guitars and percussion Floater is known for, but also strings, piano, and other facets that are in keeping with this band's unique style.
Acousto-optic effect The acousto-optic effect is a photoelastic effect generated by an ultrasonic wave in transparent optical material, usually fused silica, which couples the modulating strain field of the ultrasonic wave to the optical index of refraction. The amplitude of the refractive index change is proportional to that of the sound.
Acousto-optic modulator An acousto-optic modulator (AOM), also called a Bragg cell, uses the acousto-optic effect to diffract and shift the frequency of light using sound waves (usually at radio-frequency). They are used in lasers for Q-switching, telecommunications for signal modulation, and in spectroscopy for frequency control.
Acqua & Sapone-Caffè Mokambo Acqua & Sapone-Caffè Mokambo (UCI Team Code: ASA) is a professional continental cycling team based in Italy and participates in UCI Europe Tour and when selected as a wildcard to UCI ProTour events. They are managed by Palmiro Masciarelli, assisted by directeur sportifs Lorenzo Di Lorenzo, Bruno Cenghialta and Franco Gini.
Acqua Alta Acqua Alta is a phenomenon that regularly occurs in the city of Venice, Italy, most commonly during high and spring tides. It involves the flooding of the most low lying areas of Venice, or, in more severe cases, up to 96% of the City.
Acqua Felice The Acqua Felice is one of the aqueducts of Rome, completed in 1586 by Pope Sixtus V, whose birth name, which he never fully abandoned, was Felice Peretti. Its source is at the springs at Pantano Borghese, off Via Casilina.

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