Congo red

RELATED WORDS :

POS

Noun Phrase

HYPHEN

Con=go red

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WORDNET DICTIONARY

Noun Congo red has 1 sense

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

CIDE DICTIONARY

Congo red,

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. [Webster 1913 Suppl.]