ac·ne /ˈækni/
  痤瘡,粉刺
  ac·ne /ˈæknɪ/ 名詞
  ac·ne n.  Med. Inflammation of the sebaceous glands that are associated with hair follicles, leading to visible comedones and pimples, especially on the face, back, and chest.
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  acne
       n : an inflammatory disease involving the sebaceous glands of
           the skin; characterized by papules or pustules or
           comedones