pigmentationn.
/ˌpɪɡmɛnˈteɪʃn/, /ˌpɪɡm(ə)nˈteɪʃn/, U.S. /ˌpɪɡmənˈteɪʃ(ə)n/, /ˌpɪɡˌmɛnˈteɪʃ(ə)n/ Chiefly Biology and Medicine.
Coloration or discoloration resulting from the formation or deposition of pigment in the tissues; (gen.) the presence of pigment, coloration by pigment.
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the world > life > biology > substance > pigment > [noun] > manifestation of
pigmentation1867
1867 J. King Causes Chronic Dis. 1547 In retinal hemorrhage, retinal pigmentation, and certain cases of atrophy of the choroid, it is dark in some part of its extent.
1881 A. Flint Treat. Princ. Med. (ed. 5) 59 Pigmentation is not in itself a morbid process of much importance.
1965 B. E. Freeman tr. A. Vandel Biospeleol. ii. 20 A few species retain normal pigmentation.
1980 Illustr. London News Mar. 24/1 With the possibility of storing works of art the glass would now be grey, as green might affect the pigmentation of pictures.
1990 Internat. Jrnl. Epidemiol. 19 808/1 Previous studies have shown very consistently an increased risk of melanoma with light pigmentation, shown by light or red hair colour, light skin colour, and blue eyes.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1867