1. Massive thick-skinned herbivorous animal living in or around rivers of tropical Africa
   "The hippopotamus spent most of the day submerged in the river to stay cool";
   - hippo, river horse, Hippopotamus amphibius

Derived forms: hippopotami, hippopotamuses

Type of: artiodactyl, artiodactyl mammal, even-toed ungulate

Part of: genus Hippopotamus

Encyclopedia: Hippopotamus