onychomadesis

[ ŏn′ĭ-kō′mə-dēsĭs ]

n.

Complete shedding of a fingernail or toenail, usually associated with a systemic illness.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.