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单词 blackhead
释义

WordReference Random House Learner's Dictionary of American English © 2024
black•head /ˈblækˌhɛd/USA pronunciation   n. [countable]
  1. Pathologya small, black-tipped spot on the skin, esp. on the face.

WordReference Random House Unabridged Dictionary of American English © 2024
black•head  (blakhed′),USA pronunciation n. 
  1. Pathologya small, black-tipped, fatty mass in a skin follicle, esp. of the face;
    comedo.
  2. Birdsany of several birds having a black head, as the greater scaup, Aythya marila.
  3. Veterinary DiseasesAlso called enterohepatitis. a 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.
  • black + head 1650–60

Collins Concise English Dictionary © HarperCollins Publishers::
blackhead /ˈblækˌhɛd/ n
  1. a black-tipped plug of fatty matter clogging a pore of the skin, esp the duct of a sebaceous gland
  2. any of various birds, esp gulls or ducks, with black plumage on the head
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