Definition of Perionychium
Perionychium: The tissue surrounding the nail, whether it be a fingernail or a toenail, including the tissue bordering the root and sides of the nail.
The word is composed of "peri-" meaning around or surrounding + the Greek word "onyx" for nail = around the nail.
Last Editorial Review: 6/14/2012
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?