onycholysis

[ ŏn′ĭ-kŏlĭ-sĭs ]

n.

The separation or loosening of a fingernail or toenail from its nail bed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.