belonging or pertaining to the gnawing or nibbling mammals of the order Rodentia, including the mice, squirrels, beavers, etc.

a rodent mammal.

noun

beaver , biting , cavy , chinchilla , chipmunk , gerbil , gnawing , gopher , guinea pig , hamster , hare , kangaroo rat , leporide , leveret , marmot , mole , mouse , murine , muskrat , porcupine , prairie dog , rabbit , rat , ratel , squirrel , vole , weasel , woodchuck