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Meaning of blackhead

black•head

Pronunciation: (blak'hed"), [key]
— n.
  1. a small, black-tipped, fatty mass in a skin follicle, esp. of the face; comedo.
  2. any of several birds having a black head, as the greater scaup, Aythya marila.
  3. Also calleda malignant, infectious disease of turkeys, chickens, and many wild birds, caused by a protozoan parasite, Histomonas meleagridas, attacking esp. the intestines and liver, and often characterized by a darkening of the skin on the head.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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