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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 ?
But, Williams argues, Whitehead is not simply interested in these future events.
In "Whitehead's Involution of an Outside Chance" Peter Canning is also concerned by a certain habit of mind.
With Whitehead, Canning argues that within a clinical practice of life "what is relevant to the meaning of life is to take the point of view of life itself." Although life is oriented towards a past that it remembers and a future that it anticipates, from the point of view of life the future is invented.
If the future is open to possibility we must at this point abandon Whitehead, Canning argues, for "Whitehead is unable to assign a definite ontological status to pure possibility." Here, a turn is made to Spinoza as a return to the foundations of metaphysics, and in particular the positing of the idea as already real and material.
In her breathtakingly innovative contribution "Cutting Away from Smooth Space: Alfred North Whitehead's Extensive Continuum in Parametric Software," Parisi begins with extension, first addressed by Whitehead in one of his very early essays "La theorie relationiste de l'espace." Working with the abstractions of ontological computer science and formal ontology, the decision to begin with extension allows a propositioning of Whitehead's mereotopological conceptualization of the extensive continuum with conceptualizations of space being produced within practices of parametric design.
To focus here primarily on the latter, Parisi begins with a reminder that Whitehead himself begins with prehensions, his technical term for the ways in which feelings are felt by any and all actual occasions.
But in a way similar to Whitehead's radical empiricism, an empiricism of saying yes to experience, Nocek argues that "an ontology of life must be fundamentally more and not less, inclusive, capable of accounting for the diversity of actual and potential life, both organic and inorganic." And it is last of these--the life of inorganic matter, or what he also designates with Deleuze and Guattari as "a life proper to matter"--that is Nocek's main concern.
But with Whitehead, and Deleuze and Guattari and a host of others, Nocek proposes that life is a process.