comedones

comedo

 [kom´ĕ-do] (pl. comedo´nes) (L.)
a plug of keratin and sebum within the dilated orifice of a hair follicle frequently containing the bacteria Corynebacterium acnes, Staphylococcus albus, and Pityrosporum ovale; see also acne vulgaris.
closed comedo whitehead (def. 1).
open comedo blackhead.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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