Aceratherium

noun

Acera·​the·​ri·​um

¦āˌserəˈthirēəm

: a genus of extinct hornless rhinoceroses of the Oligocene, Miocene, and Pliocene

Word History

Etymology

New Latin, irregular from Greek akeratos + New Latin -therium

First Known Use

circa 1845, in the meaning defined above

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