Webster’s Revised Unabridged Dictionary · 1913
Keratose
Ker′a·tose′ (kĕr′ȧ·tōs′), n. [Gr. κέρας, -ατος, horn.] (Physiol. Chem.) A tough, horny animal substance entering into the composition of the skeleton of sponges, and other invertebrates; — called also keratode.
Ker′a·tose′, a. (Zoöl.) Containing hornlike fibers or fibers of keratose; belonging to the Keratosa.