pilonidal

American  

[pahy-luh-nahyd-l] / ˌpaɪ ləˈnaɪd l /

adjective

Pathology.

1. noting or pertaining to a growth of hair in a dermoid cyst or in the deeper layers of the skin.

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Etymology

Origin of pilonidal

From New Latin, dating back to 1875–80; see origin at pile ³, -o-, nidus, -al ¹

Example Sentences

My cheeks are crooked because I had something called a pilonidal cyst in my early 20s.

From Slate • Feb. 22, 2026

“I had what’s called a pilonidal infection. It’s an infection at the top of your butt crack,” he said, trying not to crack a smile.

From Seattle Times • Aug. 25, 2022