hippopotamus

noun2

1. •
   A semi-aquatic, herbivorous, African hoofed mammal of the family Hippopotamidae.
2. •
   The common hippopotamus (Hippopotamus amphibius).

   • These were the first hippopotami that we had ever seen, and, to judge by their insatiable curiosity, I should judge that we were the first white men that they had ever seen. — 1886