ALL meanings of phenolsulfonephthalein
phe·nol·sul·fone·phthal·ein
P p - noun phenolsulfonephthalein a bright to dark red crystalline compound, C 1 9 H 1 4 O 5 S, slightly soluble in water, alcohol, and acetone: used as an acid-base indicator and as a diagnostic reagent in medicine. 1