methyl orange

English Thesaurus

1. an azo dye used as an acid-base indicator; used for titrations involving weak bases (noun.substance)

hypernym	:	acid-base indicator,
definition	:	an indicator that changes color on going from acidic to basic solutions (noun.substance)

hypernym	:	azo dye,
definition	:	any dye containing one or more azo groups (noun.substance)