rodent

n. order of gnawing or nibbling mammals

Rodentia is an order of mammals also known as rodents, characterised by two continuously-growing incisors in the upper and lower jaws which must be kept short by gnawing. Forty-percent of mammal species are rodents, and they are found in vast numbers on all continents other than Antarctica. Common rodents include mice, rats, squirrels, chipmunks, gophers, porcupines, beavers, hamsters, gerbils, and guinea pigs. Rodents have sharp incisors that they use to gnaw wood, break into food, and bite predators. Most eat seeds or plants, though some have more varied diets. They have historically been pests, eating human seed stores and spreading disease.
See more at Wikipedia.org...

Noun
1. relatively small gnawing animals having a single pair of constantly growing incisor teeth specialized for gnawing
(synonym) gnawer, gnawing animal
(hypernym) placental, placental mammal, eutherian, eutherian mammal
(hyponym) mouse
(member-holonym) Rodentia, order Rodentia

v. break in, run in, grind

v. roam about, rove, lurk, prowl, stalk, hang around

(v. t.)
Of or pertaining to the Rodentia.
  

(v. t.)
Gnawing; biting; corroding; (Med.) applied to a destructive variety of cancer or ulcer.
  

(v. t.)
Gnawing.
  

(n.)
One of the Rodentia.