(plural hippopotamuses or hippopotami), [informal] hippo (plural hippos) [noun] [C] - a very large animal with a large rectangular head, short legs and thick, dark grey skin which lives in river areas in tropical AfricaHippopotamuses' skin dries out easily, so they spend the day in water and only come onto land at night.
HIPPOPOTAMUS
Meaning of HIPPOPOTAMUS in English
Cambridge English vocab. Кембриджский английский словарь. 2012