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sulfur dye

American

[suhl-fer dahy] / ˈsʌl fər ˌdaɪ /

Also sulfide dye

noun

Chemistry.

any of the class of dyes produced by heating an organic compound, as an indophenol, with sulfur or sodium polysulfide, used chiefly in dyeing cotton.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023