Any of numerous small rodents of the families Muridae and Cricetidae, such as the common house mouse(Mus musculus), characteristically having a pointed snout, small, rounded ears, and a long, naked or almost hairless tail.

• 鼠一种鼠科和仓鼠科家族的小型啮齿类动物，如常见的家鼠（台湾鼷鼠），典型特点为尖嘴、小圆耳朵、长而无毛或少毛的尾巴