A black-tipped plug clogging a pore of the skin

• Dermal blemish
• Certain facial blemish

Wikipedia Word definitions in Wikipedia
A comedo is a clogged hair follicle (pore) in the skin. Keratin (skin debris) combines with oil to block the follicle. A comedo can be open ( blackhead ) or closed by skin ( whitehead ), and occur with or without acne . The word comedo comes from the Latin ...

Wiktionary Word definitions in Wiktionary
n. a blackhead

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"blackhead," etc., 1866, from Latin comedo "glutton," from comedere "to eat up" (see comestible ). A name formerly given to worms that devour the body; transferred in medical use to secretions that resemble them.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Comedo \Com"e*do\, n.; pl. Comedones . [L., a glutton. See Comestible .] (Med.) 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).

WordNet Word definitions in WordNet
n. a black-tipped plug clogging a pore of the skin [syn: blackhead ] [also: comedones (pl)]