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blackheads Definition
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blackheads
noun(black-head)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
blackheads
noun(black-head)a destructive disease of turkeys and related birds caused by a protozoan (Histomonas meleagridis) that invades the intestinal ceca and liver
blackheads
noun(black-head)a larval clam or mussel attached to the skin or gills of a freshwater fish