English

Definition of colourant noun from the Oxford Advanced Learner's Dictionary

 

colourant

 noun
(especially US English colorant) noun
BrE BrE//ˈkʌlərənt//
 
; NAmE NAmE//ˈkʌlərənt//
 
Hair products and accessories
 
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a substance that is used to put colour in something, especially a person’s hair natural hair colourants Medicines also contain colourants, often in large amounts. See related entries: Hair products and accessories
See the Oxford Advanced American Dictionary entry: colourant