n.
Pronunciation: ˌ per- ē - ō - ' ni-k ē - ə m
Function: noun
Inflected Form: plural -ia \ -k ē - ə \
Etymology: New Latin, from peri- + Greek onych-, onyx nail ― more at NAIL
Date: circa 1879
: the tissue bordering the root and sides of a fingernail or toenail