blackhead

noun

Etymology: Etymology tree Proto-Germanic *blakaz Proto-West Germanic *blak Old English blæc Middle English blak English black Proto-Indo-European *kap- Proto-Indo-European *káput Proto-Germanic *haubudą Old English hēafod Middle English heed English head English blackhead From black + head.

1. 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.

   “See there! A son is born And we pronounce him fit to fight There are blackheads on his shoulders And he pees himself in the night.”

   “Wallace sees a cluster of tiny blackheads at the corner of his nose.”

2. A form of histomoniasis in poultry, characterized by cyanotic discoloration on the bird's head.
3. A scaup: any of various ducks of the genus Aythya.