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1. a comedo whose opening is not widely dilated, appearing as a small, flesh-colored papule; because the keratin and sebum produced cannot escape, it may rupture and cause an inflammatory lesion in the dermis. See also acne vulgaris. Called also closed comedo.
2. popular name for milium.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Walter, English surgeon, 1840-1913. See: Whitehead deformity, Whitehead operation.
Farlex Partner Medical Dictionary © Farlex 2012


(wīt′hĕd′, hwīt′-)
1. A skin lesion consisting of a hair follicle that is occluded with sebum and keratin, appearing white at the surface.
2. See milium.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


(1) Closed comedo.
(2) Milia, see there.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


, pl. milia (mil'ē-ŭm, -ă)
A small subepidermal keratin cyst, usually multiple and therefore commonly referred to in the plural.
Synonym(s): whitehead (1) .
[L. millet]

closed co·me·do

(klōzd kom'ĕ-dō)
A comedo with a narrow or obstructed opening on the skin surface; closed comedos may rupture, producing a low-grade dermal inflammatory reaction.
Synonym(s): whitehead (2) .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Whitehead, Alfred North, Adventures of Ideas, New York, The Free Press, 1933 / 1967.
Whitehead, Alfred North, Modes of Thought, New York, The Free Press, 1938 / 1968.
Whitehead, Alfred North, Essays in Science and Philosophy, New York, Philosophical Library, 1948.