Congo color: Meaning and Definition of

Con'go col"or

Pronunciation: [key]
— Chem. Chem.
  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. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.