uintatherium

from The Century Dictionary.

• noun The typical genus of Uintatheriidæ, originally based on fragmentary material, and now believed to be synonymous with Dinoceras of same ostensible date.
• noun [lowercase] An animal of this genus.

from the GNU version of the Collaborative International Dictionary of English.

• noun (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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun type genus of the Uintatheriidae; extinct large herbivorous ungulates somewhat resembling elephants; from the Eocene in Wyoming