Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
congo red | Yes | No | No | No |
acid-base indicator | Yes | No | No | No |
congo red (noun) | acid-base indicator (noun) |
---|---|
a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions) | an indicator that changes color on going from acidic to basic solutions |