acid dye

noun

Chemistry.

1. any of a class of dyes containing one or more acidic groups, as the sulfo group: used in acid solution chiefly for dyeing wool and silk.

acid dye

noun

1. a dye in which the chromophore is part of a negative ion usually applied from an acidic solution

Word History and Origins

Origin of acid dye¹

First recorded in 1885–90