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hyperpigmentation
hyperpigmentation n. 
/ˌhʌɪpəpɪɡm(ə)nˈteɪʃn/, /ˌhaɪpərˌpɪɡˌmɛnˈteɪʃən/ Medicine excessive pigmentation.
Brit. /ˌhʌɪpəpɪɡmɛnˈteɪʃn/
, /ˌhʌɪpəpɪɡmɛnˈteɪʃn//ˌhʌɪpəpɪɡm(ə)nˈteɪʃn/U.S. /ˌhaɪpərˌpɪɡm(ə)nˈteɪʃən/
, /ˌhaɪpərˌpɪɡm(ə)nˈteɪʃən//ˌhaɪpərˌpɪɡˌmɛnˈteɪʃən/ΘΚΠ
the world > health and disease > ill health > a disease > disorders of visible parts > skin disorders > [noun] > disordered pigmentation
melasma1563
orange skin1822
melanopathia1847
xanthosis1853
xanthelasma1867
xanthochroia1867
xanthoderma1867
xanthopathia1867
xanthoma1869
argyria1874
chloasma1877
leucoderma1884
xeroderma pigmentosum1884
hyperchromatosis1886
melanodermia1886
leucodermia1888
hyperchromasia1889
hyperpigmentation1890
hypochromia1890
xanthochromia1894
xanthodermia1900
melanization1927
1890 J. S. Billings National Med. Dict. I. 669/2 Hyperpigmentation.
1899 G. T. Jackson Dis. Skin (ed. 3) 394 Nævus Pigmentosus... A congenital, circumscribed hyper-pigmentation of the skin.
1956 D. M. Pillsbury et al. Dermatol. xxxviii. 868 Endocrine disturbances are..commonly associated with hyperpigmentation such as is seen..during pregnancy, and with exophthalmic goiter.
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