rodent

详细解释:a. 咬的, 啮齿类的
n. 啮齿动物
【医】 咬的, 侵蚀性的(溃疡), 啮齿动物

英语解释：

名词 rodent:

relatively small gnawing animals having a single pair of constantly growing incisor teeth specialized for gnawing同义词：gnawer, gnawing animal