Calque of hippopotamus, from Ancient Greek ἱπποπόταμος (hippopotamos), from ἵππος (hippos, “horse”) + ποταμός (potamos, “river”).
river horse (plural river horses)
- (poetic) hippopotamus
- 1851, Herman Melville, Moby-Dick, Chapter 1
- It is out of the idolatrous dotings of the old Egyptians upon broiled ibis and roasted river horse, that you see the mummies of those creatures in their huge bake-houses the pyramids.