BLACKHEAD

blackhead

Noun

  1. A comedo, a skin blemish, a type of acne vulgaris, where a pore becomes clogged with a dark, hard, cheesy keratin-filled substance forming a hard black "head" on the skin's surface.
  2. A form of histomoniasis in poultry, characterized by cyanotic discoloration on the bird's head.
  3. A scaup: a kind of duck.


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