hyponychium

[hī′pō-nĭkē-əm]

n.

The epithelium of the nail bed, especially its posterior part in the region of the lunula.

Related formshy′po•nychi•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.