Medical term:

epionychium


eponychium

 [ep″o-nik´e-um]
1. cuticle.
2. the horny fetal epidermis at the site of the future nail.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ep·o·nych·i·um

(ep'ō-nik'ē-ŭm),
1. The corneal layer of epidermis overlapping and in direct contact with the nail root proximally or the sides of the nail plate laterally, forming the undersurface of the nail wall or nail folds. Synonym(s): hidden nail skin, perionychium
2. The thin, condensed, eleidin-rich layer of epidermis that precedes and initially covers the nail plate in the embryo. It normally degenerates by the eighth month except at the nail base where it remains as the cuticle of the nail.
3. The thin skin adherent to the nail at its proximal portion.
Synonym(s): epionychium
[G. epi, upon, + onyx (onych-), nail]
Farlex Partner Medical Dictionary © Farlex 2012

ep·o·nych·i·um

(ep'ō-nik'ē-ŭm) [TA]
1. The thin, condensed, eleidin-rich layer of epidermis that precedes and initially covers the nail plate in the embryo. It normally degenerates by the eighth month, except at the nail base, where it remains as the cuticle of the nail.
2. The corneal layer of epidermis overlapping and in direct contact with the nail root proximally or the sides of the nail plate laterally, forming the undersurface of the nail wall or nail folds.
Synonym(s): perionychium.
3. The thin skin adherent to the nail at its proximal portion.
[G. epi, upon, + onyx (onych-), nail]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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