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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.

Etymology

Origin of pilonidal

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.