blackhead

noun black·head \ ˈblak-ˌhed \

Definition of blackhead

1 :a small plug of darkened sebum and dead skin cells that fills a pore of the skin especially on the face called also comedo, open comedo; compare whitehead
2 :a destructive disease of turkeys and related birds caused by a protozoan (Histomonas meleagridis) that invades the intestinal ceca and liver
3 :a larval clam or mussel attached to the skin or gills of a freshwater fish

Recent Examples of blackhead from the Web

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First Known Use of blackhead

circa 1837


BLACKHEAD Defined for English Language Learners

blackhead

noun

Definition of blackhead for English Language Learners

  • : a small, inflamed area on the skin with a dark spot in the middle


BLACKHEAD Defined for Kids

blackhead

noun black·head \ ˈblak-ˌhed \

Definition of blackhead for Students

:a darkened bit of oily material blocking a pore in the skin

Medical Dictionary

blackhead

noun black·head \ ˈblak-ˌhed \

medical Definition of blackhead

1 :a small plug of sebum blocking the duct of a sebaceous gland especially on the face — compare milium
2 :a destructive disease of turkeys and related birds caused by a protozoan of the genus Histomonas (H. meleagridis) that invades the intestinal ceca and liver called also enterohepatitis, histomoniasis, infectious enterohepatitis


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