| ACN | an inflammatory disease involving the sebaceous glands of the skin |
|---|---|
| ACN | a skin disease of adults (more often women) in which blood vessels of the face enlarge resulting in a flushed appearance |
| ACN | the most common form of acne |
| ACN | (of complexion) blemished by imperfections of the skin |
| ACN | resembling acne |
| ACN | a subclass of Sporozoa |