noun. A skin lesion consisting of a hair follicle that is occluded with sebum and keratin, appearing black at the surface.

noun. An infectious disease of turkeys and some wildfowl that is caused by a protozoan (Histomonas meleagridis) and results in lesions of the intestine and liver.

noun. Any of various birds, such as the scaup, with dark head markings.

noun. A popular name of the scaups or sea-ducks of the genus Aithyia: as, the greater and lesser blackheads, A. marila and A. affinis. See scaup.

noun. A local name in the United States of the black-headed minnow, or fathead, Pimphales promelas.

noun. In entomology, the larva of an American tortricid moth, Eudemis vacciniana, which feeds on the leaves of the cranberry. Also called fire-worm.

noun. A common name for comedo. See comedo.

noun. The scaup duck.

noun. A 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.

noun. A scaup: a kind of duck.

noun. a black-tipped plug clogging a pore of the skin

"Extractions of active acne whether it is the pustule type we call a pimple or a comedone, which we refer to as a blackhead are tricky and unnecessary and can be unsafe too."

blemish  defect  mar  

birthmark  bleb  blemish  blister  bulla