1
- a gnawing mammal of an order that includes rats, mice, squirrels, hamsters, porcupines, and their relatives, distinguished by strong constantly growing incisors and no canine teeth. They constitute the largest order of mammals.啮齿目动物。
1.1
- Order Rodentia: three suborders.
词源
mid 19th cent.: from Latin rodent- 'gnawing', from the verb rodere.