Source : Webster's Revised Unabridged Dictionary (1913)

Hippopotamus \Hip`po*pot"a*mus\, n.; pl. E. {Hippopotamuses}, L.
   {Hippopotami}. [L., from Gr.?; "i`ppos horse + ? river. Cf.
   {Equine}.] (Zo["o]l.)
   A large, amphibious, herbivorous mammal ({Hippopotamus
   amphibius}), common in the rivers of Africa. It is allied to
   the hogs, and has a very thick, naked skin, a thick and
   square head, a very large muzzle, small eyes and ears, thick
   and heavy body, and short legs. It is supposed to be the
   behemoth of the Bible. Called also {zeekoe}, and {river
   horse}. A smaller species ({H. Liberiencis}) inhabits Western
   Africa.