cuticle

nouns

the dead skin at the base of a fingernail or toenail
cuticle
is a type of (narrower)
a natural protective body covering and site of the sense of touch
"your skin is the largest organ of your body"
cutis, skin, tegument
the outer layer of the skin covering the exterior body surface of vertebrates
cuticle, epidermis
hard outer covering or case of certain organisms such as arthropods and turtles
carapace, cuticle, shell, shield
is derived from
cuticular