eponychium

[ ep-uh-nik-ee-uhm ]
/ ˌɛp əˈnɪk i əm /

noun, plural ep·o·nych·i·a [ep-uh-nik-ee-uh], /ˌɛp əˈnɪk i ə/,

Embryology. the modified outer layer of the epidermis that partially covers the fetal fingernails and toenails and that persists after birth as the cuticle.
Anatomy. a thin, cuticular fold extending over the lunula of a nail.

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Origin of eponychium

1880–85; <New Latin, equivalent to ep-ep- + onych- (see onyx) + -ium-ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for eponychium

eponychium
[ ĕp′ə-nĭkē-əm ]

n.

The condensed eleidin-rich areas of the epidermis preceding the formation of nails in the embryo.
The thin skin adhering to the nail at its base.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.