blackhead

Meanings

Plural: blackheads

Noun

• a black-tipped plug clogging a pore of the skin
• A type of 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.
• A form of histomoniasis in poultry, characterized by cyanotic discoloration on the bird's head.
• A scaup: any of various ducks of the genus Aythya.

Synonyms

comedo, open comedo