Definitions

from the GNU version of the Collaborative International Dictionary of English

  • An artificial red dye from which the Congo group received its name. It is also widely used either in aqueous solution or as test paper (Congo paper) for the detection of free acid, which turns it blue.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)

Etymologies

Sorry, no etymologies found.

Examples

Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.