from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Relating to or marked by keratosis; horny.
from the GNU version of the Collaborative International Dictionary of English
- adj. Containing hornlike fibers or fibers of keratose; belonging to the Keratosa.
- n. A tough, horny animal substance entering into the composition of the skeleton of sponges, and other invertebrates; -- called also keratode.
Sorry, no etymologies found.
Oscar Schmidt has already pointed this out in the siliceous sponges and keratose sponges; and I, in my monograph, in three volumes, on the Calcareous