Word Study
oreodon
CIDE DICTIONARY
oreodon, prop. n. [Gr. 'o`ros, -eos, mountain + 'odoy`s, 'odo`ntos, tooth.].
A genus of extinct herbivorous mammals, abundant in the Tertiary formation of the Rocky Mountains. It is more or less related to the camel, hog, and deer. [1913 Webster]
For further exploring for "oreodon" in Webster Dictionary Online