First Known Use: 1880
Dictionary
pilonidal
adjective pi·lo·ni·dal \ˌpī-lə-ˈnī-dəl\
Definition of PILONIDAL
: of, relating to, or being a hair-containing cyst of the skin in the lower-back region near the upper crease of the buttocks
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Origin of PILONIDAL
Latin pilus hair + nidus nest
Medical Dictionary
pilonidal
adjective pi·lo·ni·dal \ˌpī-lə-ˈnīd-əl\
Medical Definition of PILONIDAL
1
: containing hair nested in a cyst—used of congenitally anomalous cysts in the sacrococcygeal area that often become infected and discharge through a channel near the anus
2
: of, relating to, involving, or for use on pilonidal cysts, tracts, or sinuses
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