perionychium


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Related to perionychium: nail wall, sympodia

cuticle

 [ku´tĭ-k'l]
1. a layer of more or less solid substance covering the free surface of an epithelial cell.
2. the narrow band of epidermis extending from the nail wall onto the nail surface; called also eponychium and perionychium.
enamel cuticle primary cuticle.
primary cuticle a film on the enamel of unerupted teeth, considered to be the final product of degenerating ameloblasts after completion of enamel formation. Called also enamel cuticle and Nasmyth's membrane.

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]

perionychium

/peri·onych·i·um/ (-o-nik´e-um) eponychium (1).

perionychium

(pĕr′ē-ō-nĭk′ē-əm)
n. pl. perionych·ia (-ē-ə)
The border of epidermal tissue surrounding a fingernail or toenail.

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]

perionychium

the epidermis bordering a nail or claw.