hy·​per·​pig·​men·​ta·​tion ˌhī-pər-ˌpig-mən-ˈtā-shən How to pronounce hyperpigmentation (audio)
: 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 adjective
hyperpigmented skin

Word History

First Known Use

1866, in the meaning defined above

Time Traveler
The first known use of hyperpigmentation was in 1866

Dictionary Entries Near hyperpigmentation

Cite this Entry

“Hyperpigmentation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperpigmentation. Accessed 9 Dec. 2022.

Medical Definition


hy·​per·​pig·​men·​ta·​tion -ˌpig-mən-ˈtā-shən, -ˌmen- How to pronounce hyperpigmentation (audio)
: excess pigmentation in a body part or tissue (as the skin)
hyperpigmentation of deep inflammatory acne lesions Elizabeth A. Abel et al.
hyperpigmented adjective
hyperpigmented skin
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