U

rhinoceros

noun, plural rhi·noc·er·os·es, (especially collectively) rhi·noc·er·os.

any of several large, thick-skinned, perissodactyl mammals of the family Rhinocerotidae, of Africa and India, having one or two upright horns on the snout: all rhinoceroses are endangered.
Douay Bible. unicorn(def 4).

noun plural -oses or -os

any of several perissodactyl mammals constituting the family Rhinocerotidae of SE Asia and Africa and having either one horn on the nose, like the Indian rhinoceros (Rhinoceros unicornis), or two horns, like the African white rhinoceros (Diceros simus) They have a very thick skin, massive body, and three digits on each foot

c.1300, from Latin rhinoceros, from Greek rhinokeros, literally “nose-horned,” from rhinos “nose” (a word of unknown origin) + keras “horn” (see kerato-). Related: Rhinocerotic.

What is the plural of rhinoceros? … Well, Liddell and Scott seem to authorize ‘rhinocerotes,’ which is pedantic, but ‘rhinoceroses’ is not euphonious. [Sir Charles Eliot, “The East Africa Protectorate,” 1905]