hippopotamushippopotamus /ˌhɪpəˈpɑt̮əməs/ noun (plural hippopotamuses or hippopotami /-maɪ/) [countable]Etymology
ETYMOLOGYhippopotamus
Origin: 1500-1600 Latin Greek, from hippos horse + potamos river
a large African animal with a large head, a wide mouth, and thick gray skin, that lives in and near water [Origin: 1500–1600 Latin, Greek, from hippos horse + potamos river]