|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|See also rosacea Also called: acne vulgaris a chronic skin disease common in adolescence, involving inflammation of the sebaceous glands and characterized by pustules on the face, neck, and upper trunk|
|[C19: New Latin, from a misreading of Greek akmē eruption on the face. See |
acne ac·ne (āk'nē)
An inflammatory disease of the sebaceous glands and hair follicles of the skin that is marked by the eruption of pimples or pustules, especially on the face.
acne vulgaris acne vul·gar·is (vŭl-gâr'ĭs)
An inflammatory eruption affecting the face, upper back, and chest, consisting of blackheads, cysts, papules, and pustules, and occurring primarily during puberty and adolescence.