Definition: The rodents; the largest order of placental mammals (class Eutheria), all possessing one pair of chisellike upper incisors for gnawing and flat-crowned premolars and molars for grinding; it includes the mice, rats, guinea pigs, squirrels, beavers, and many more.
[Mod. L., fr. L. rodo, pres. p. rodens, to gnaw]
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Examples: glitazone, GI cocktail, etc.