triarylmethane dye

[ trahy-ar-il-meth-eyn ]
/ traɪˌær ɪlˈmɛθ eɪn /

noun Chemistry.

any of the class of dyes containing three aryl groups attached to a central carbon atom: used chiefly for dyeing cotton, wool, and silk.

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020