noun
or phenolsulfonphthalein | ̷ ̷ˌ ̷ ̷| ̷ ̷ˌ ̷ ̷| ̷ ̷( ̷ ̷) ̷ ̷
Etymology: International Scientific Vocabulary phenol + sulfonephthalein or sulfonphthalein
: a red crystalline compound C 19 H 14 O 5 S formed by condensation of the anhydride of ortho -sulfobenzoic acid and phenol and used chiefly as a test of kidney function and as an acid-base indicator — called also phenol red