Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
An azo dye that turns red in alkaline, blue in acidic solutions.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: acid-base indicator, azo dye
History
No etymology was provided for this word.
