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Rat
Rat is the term generally and indiscriminately applied to numerous members of several rodent families having bodies longer than about 12 cm, or 5 inches (Smaller thin-tailed rodents are just as often indiscriminately referred to as mice).Encyclopædia Britannica In scientific usage, a rat is any one of about 56 different species of small, omnivorous rodents belonging to the genus Rattus.
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