Meaning of perionychium

per•i•o•nych•i•um

Pronunciation: (per"ē-ō-nik'ē-um), [key]
— pl. -nych•i•a
  1. the epidermis surrounding the base and sides of a fingernail or toenail.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.