Bron`to*the"ri*um (?), n. [NL., fr. Gr. thunder + beast.] Paleon.

A genus of large extinct mammals from the miocene strata of western North America. They were allied to the rhinoceros, but the skull bears a pair of powerful horn cores in front of the orbits, and the fore feet were four-toed. See Illustration in Appendix.


© Webster 1913.

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