Comedo

n.

1.

(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).

Noun

1.

comedo - a black-tipped plug clogging a pore of the skin Synonyms: blackhead

blackhead, blemish, cutis, defect, mar, skin, tegument