資料來源 : Webster's Revised Unabridged Dictionary (1913)

Keratosa \Ker`a*to"sa\, n. pl. [NL., fr. Gr. ke`ras, -atos, a
   horn.] (Zo["o]l.)
   An order of sponges having a skeleton composed of hornlike
   fibers. It includes the commercial sponges.