prop. n. [ Gr. 'o`ros, -eos, mountain + 'odoy`s, 'odo`ntos, tooth. ] (Paleon.) 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 ]
n. (Chem.) A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant (Imperatoria Oreoselinum), and yields resorcin on decomposition. [ 1913 Webster ]
‖n. pl. [ NL., from Gr. 'o`ros, -eos, mountain + sw^ma body. ] (Zool.) A genus of small oceanic fishes, remarkable for the large conical tubercles which cover the under surface. [ 1913 Webster ]
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