Source : Webster's Revised Unabridged Dictionary (1913)

Uintatherium \U*in`ta*the"ri*um\, n. [NL., fr. Uinta, the Indian
   name of the region where the animals were discovered + Gr.
   qhri`on beast.] (Paleon.)
   An extinct genus of large Eocene ungulates allied to
   Dinoceras. This name is sometimes used for nearly all the
   known species of the group. See {Dinoceras}.

Dinoceras \Di*noc"e*ras\, n. [NL., fr. Gr. ? terrible + ?, ?,
   horn.] (Paleon.)
   A genus of large extinct Eocene mammals from Wyoming; --
   called also {Uintatherium}. See Illustration in Appendix.

   Note: They were herbivorous, and remarkable for three pairs
         of hornlike protuberances on the skull. The males were
         armed with a pair of powerful canine tusks.

Source : WordNet®

Uintatherium
     n : type genus of the Uintatheriidae; extinct large herbivorous
         ungulates somewhat resembling elephants; from the Eocene
         in Wyoming [syn: {genus Uintatherium}]