Meaning of lichenification

li•chen•i•fi•ca•tion

Pronunciation: (lī-ken"u-fi-kā'shun), [key]
— n. Med.
  1. a leathery hardening of the skin, usually caused by chronic irritation.
  2. a patch of skin so hardened.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.