black heads

Medical Dictionary

blackhead black·head (blāk'hěd')
n.
A plug of keratin and sebum within a hair follicle that is blackened at the surface. Also called open comedo.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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