[rodents; the largest order of placental mammals (class Eutheria), all possessing one pair of chisel-like upper incisors for gnawing and flat-crowned premolars and molars for grinding; it includes the mice, rats, guinea pigs, squirrels, beavers, and many more. ( CSP )]
UMLS (NCI) C0035804 Relation/PAR: Mammal
Relation/CHD: chinchilla
Cricetinae
house mouse
laboratory mouse
Peromyscus
field mouse
Cavia
laboratory rat
squirrel
gerbil/jird