acne vulgaris
noun
acne vul·gar·is
-ˌvəl-ˈgar-əs, -ˈger-
: a chronic acne involving mainly the face, chest, and shoulders that is common in adolescent humans and various domestic animals and is characterized by the formation of blackheads, whiteheads, inflamed papules, pustules, or painful nodules or cysts and that may result in scarring
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Merriam-Webster unabridged
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