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Chapter 9 - Milady - Nail Structure & Growth
Chapter Glossary
16
Cosmetology
Not Applicable
07/24/2017

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Term
bed epithelium
Definition
Thin layer of tissue that attaches the nail plate and the nail bed.
Term
cuticle
Definition
Dead, colorless tissue attached to the natural nail plate.
Term
eponychium
Definition
Living skin at the base of the natural nail plate that covers the matrix area.
Term
free edge
Definition
Part of the nail plate that extends over the tip of the finger or toe.
Term
hyponychium
Definition
Slightly thickened layer of skin under the nail that lies between the fingertip and free edge of the natural nail plate.
Term
ligament
Definition
Tough band of fibrous tissue that connects bones or holds an organ in place.
Term
lunula
Definition
Visible part of the matrix that extends from underneath the living skin; the whitish, half-moon shape at the base of the nail.
Term
matrix
Definition
Area where the nail plate cells are formed; this area is composed of matrix cells that produce the nail plate.
Term
nail bed
Definition
Portion of the living skin that supports the nail plate as it grows toward the free edge.
Term
nail groove
Definition
Furrow on each side of the nail.
Term
malformation
Definition
When a nail is abnormal in shape or form.
Term
nail plate
Definition
Hardened keratin plate that sits on and covers the natural nail bed. It is the most visible and functional part of the natural nail unit.
Term
nail unit
Definition
Composed of several major parts of the fingernail including the nail plate, nail bed, matrix, cuticle, eponychium, hyponychium, specialized ligaments, and nail fold.
Term
natural nail
Definition
Also known as onyx; the hard protective plate is composed mainly of keratin, the same fibrous protein found in skin and hair.
Term
perionychium
Definition
The tissue bordering the root and sides of a nail.
Term
side wall
Definition
Also known as lateral nail fold; the fold of skin overlapping the side of the nail.
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