■ noun a mammal of an order (Rodentia) that includes rats, mice, squirrels, and porcupines, distinguished by strong constantly growing incisors and no canine teeth.
Origin
C19: from L. ~- , rodere 'gnaw'.
RODENT
Meaning of RODENT in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004