melanin
noun
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How to pronounce melanin:

Definition of melanin:

melanin (noun):
eumelanin
see also neuromelanin, pheomelanin
insoluble pigments that account for the color of e.g. skin and scales and feathers.
any of various black, brown, reddish-brown, reddish-yellow, or yellow pigments of living organisms that in animals are typically produced in melanocytes by the oxidation of tyrosine followed by polymerization and are found especially in skin, hair, feathers, and eyes

Synonyms for melanin:

cutis
feather
plumage
plume
skin
tegument