Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun phenolphthalein

1 sense of phenolphthalein

Sense 1
phenolphthalein -- (a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8)
       => laxative -- (a mild cathartic)
       => acid-base indicator -- (an indicator that changes color on going from acidic to basic solutions)