Any of many different species in genus Dipodomys, rodents that move about by hopping.

plural of kangaroo rat

plural of Norway rat

The black rat, Rattus rattus.

The brown rat.

Synonym of black rat

The black rat.

The brown rat.

A brown rat. / (slang) A neglected boy who lives around the wharfs. / (slang) A man who hangs around a wharf in the hope of finding temporary work there.

plural of black rat