noun
(countable, medicine) 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.
(uncountable) A form of histomoniasis in poultry, characterized by cyanotic discoloration on the bird's head.
(countable) A scaup: any of various ducks of the genus Aythya.
Mac + Safari
iPhone + iPad
Google Chrome
Mozilla Firefox
Opera
Microsoft Edge