adj 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 .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2004.