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Definition of pigmentation noun from the Oxford Advanced American Dictionary

 

pigmentation

 noun
noun
NAmE//ˌpɪɡmənˈteɪʃn//
 
[uncountable]
 
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the presence of pigments in skin, hair, leaves, etc. that causes them to be a particular color The dark pigmentation of the skin gives protection in hot climates.
See the Oxford Advanced Learner's Dictionary entry: pigmentation