OREODONT
O"re*o*dont, a. (Paleon.)
Defn: Resembling, or allied to, the genus Oreodon.
OREOGRAPHIC
O`re*o*graph"ic, a.
Defn: Of or pertaining to oreography.
OREOGRAPHY
O`re*og"ra*phy, n. Etym: [Gr. -graphy.]
Defn: The science of mountains; orography.
OREOSELIN
O`re*os"e*lin, n. (Chem.)
Defn: A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant (Imperatoria Oreoselinum), and yields resorcin on decomposition.
OREOSOMA
O`re*o*so"ma, n. pl. Etym: [NL., from Gr. (Zoöl.)
Defn: A genus of small oceanic fishes, remarkable for the large conical tubercles which cover the under surface.