alizarine yellow

noun, often capitalized A&Y

Definition of alizarine yellow

  1. :  any of various mordant dyes not related chemically to alizarin but applicable by similar methods: such as a :  a monoazo dye made by coupling diazotized m-nitroaniline with salicylic acid —called also Alizarine Yellow 2G b :  a monoazo dye made by coupling p-nitroaniline with salicylic acid and used chiefly as an acid-base indicator —called also Alizarine Yellow R c :  gallacetophenone —called also Alizarine Yellow C

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First Known Use of alizarine yellow

1893


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