Dictionary
cor•ni•fi•ca•tion
Pronunciation: (kôr"nu-fi-kā'shun), [key]—
n. Biol.
the formation of a horny layer of skin, or horny skin structures, as hair, nails, or scales, from squamous epithelial cells.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.