单词	hyperpigmentation
释义	hyperpigmentation noun hy·​per·​pig·​men·​ta·​tion ˌhī-pər-ˌpig-mən-ˈtā-shən  -ˌmen- : excess pigmentation in a bodily part or tissue (such as the skin) Vitamin C has been reported to inhibit the production of melanin, the stuff that produces not only a tan but also freckles and hyperpigmentation. Anne Weintraub The presence of nickel can cause a skin rash that leads to hyperpigmentation, or darkening, of the skin. Jenyne M. Raines hyperpigmented ˌhī-pər-ˈpig-mən-təd  -ˌmen- adjective hyperpigmented skin Word History First Known Use 1866, in the meaning defined above Medical Definition hyperpigmentation noun hy·​per·​pig·​men·​ta·​tion -ˌpig-mən-ˈtā-shən, -ˌmen-  : excess pigmentation in a body part or tissue (as the skin) hyperpigmentation of deep inflammatory acne lesions Elizabeth A. Abel et al.
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