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colourant

noun
🔊/ˈkʌlərənt/
🔊/ˈkʌlərənt/
(US English colorant)
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  1. a substance that is used to put colour in something, especially a person’s hair着色剂；染色剂（尤指染发剂）
    • natural hair colourants天然染发剂
    • Medicines also contain colourants, often in large amounts.药物还含有大量的着色剂。
    Topics Appearancec2