Source : Webster's Revised Unabridged Dictionary (1913)

Oreosoma \O`re*o*so"ma\, n. pl. [NL., from Gr. 'o`ros, -eos,
   mountain + ? body.] (Zo["o]l.)
   A genus of small oceanic fishes, remarkable for the large
   conical tubercles which cover the under surface.