A large aquatic rodent(Ondatra zibethica)of North America, related to the lemming and the vole and having a dense brown coat and musk glands under a broad, flat tail.

• 麝鼠一种美洲北部的大型水生啮齿动物（麝香鼠），与旅鼠和田鼠有关，长有深褐色皮毛和宽而扁的尾巴（下有放出麝香味的分泌腺）