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blackhead

[blak-hed]
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noun
  1. a small, black-tipped, fatty mass in a skin follicle, especially of the face; comedo.
  2. any of several birds having a head that is black, as the greater scaup, Aythya marila.
  3. Also called enterohepatitis. Veterinary Pathology. a malignant, infectious disease of turkeys, chickens, and many wild birds, caused by a protozoan parasite, Histomonas meleagridas, attacking especially the intestines and liver, and often characterized by a darkening of the skin on the head.
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Origin of blackhead

First recorded in 1650–60; black + head
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for blackhead

blister, blemish, lump, acne, freckle, blot, bruise, wart, blotch, smudge, imperfection, pimple, snag, stigma, stain, scar, discoloration, abscess, zit, carbuncle

Examples from the Web for blackhead

Historical Examples of blackhead


British Dictionary definitions for blackhead

blackhead

noun
  1. a black-tipped plug of fatty matter clogging a pore of the skin, esp the duct of a sebaceous glandTechnical name: comedo
  2. an infectious and often fatal disease of turkeys and some other fowl caused by the parasitic protozoa Histomonas meleagridisTechnical name: infectious enterohepatitis
  3. any of various birds, esp gulls or ducks, with black plumage on the head
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for blackhead

n.

"comedo," 1837, from black (adj.) + head (n.). So called for its appearance.

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Online Etymology Dictionary, © 2010 Douglas Harper

blackhead in Medicine

blackhead

(blăkhĕd′)
n.
  1. A plug of keratin and sebum within a hair follicle that is blackened at the surface.open comedo
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.