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Congo color

American  

noun

Chemistry.

  1. any of a group of azo dyes derived from benzidine that will dye cotton and other vegetable fibers without the aid of a mordant.

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.