From Latin rhinoceros, from Ancient Greek ῥινόκερως (rhinokerōs), composed of ῥίς (rhis, “nose”) + κέρας (kéras, “horn”).
rhinoceros (plural rhinoceros, less commonly: rhinoceroses or rare, academic: rhinocerotes)
- Any of several large herbivorous pachyderms native to Africa and Asia of the five genera in the family Rhinocerotidae, with thick, gray skin and one or two horns on their snouts.
- 1658, Thomas Brown, “Of Unicorns Horn”, in Pseudodoxia Epidemica: Or Enquiries Into Very many Received Tenents And commonly Presumed Truths. The Fourth Edition, page 203:
- Herein therefore to draw up our determinations beside the several pieces of Scripture mentioning this Animal (which some may well contend to be only meant of the Rhinoceros) we are so far from denying there is any Unicorn at all, that we affirme there are many kinds thereof. In the number of Quadrapedes we will concede no less then five; that is the Indian Oxe, Indian Ass, Rhinoceros, the Oryx, and that which is more eminently termed Monoceros, or Unicornis.
Usage notes 
- In natural history, the plural rhinoceros is often used, in the same way that the singular of the names of many wild animals is often used in natural history as the plural (compare gazelle, elephant, etc).
- The plurals rhinoceri and rhinoceroi are often found, formed by association with other Latin and Greek plurals, though they do not represent true Latin or Greek forms.
- The Latin-derived plural form rhinocerotes is usually considered as a plural of the archaic form rhinocerot.
herbivorous pachyderm with horn(s)
See also 
rhīnocerōs (genitive rhīnocerōtis); m, third declension
- vessel made of a rhinoceros's horn
- nickname for someone with a long nose