noun. The primary lesion of acne vulgaris, consisting of a hair follicle that is occluded with sebum and keratin; a blackhead or whitehead.

noun. A small, worm-like, black-tipped mass, such as may sometimes be squeezed out of the sebaceous follicles of the face.

noun. A small nodule or cystic tumor, common on the nose, etc., which on pressure allows the escape of a yellow wormlike mass of retained oily secretion, with a black head (dirt).

noun. a blackhead

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

"Need I remind you, sir, who it was that single-handedly captured—alive, I might add—the only specimen of Malus cerebrum comedo in the history of monstrumology?"

blemish  defect  mar  

comedones