Meaning of pilonidal in English:

pilonidal

Pronunciation /ˌpʌɪlə(ʊ)ˈnʌɪdl/

adjective

Medicine Biology
  • Designating a sinus tract or cyst containing hair, typically found in the sacrococcygeal region and often chronically inflamed.

Origin

Late 19th century. From pilo- + classical Latin nīdus nest + -al.