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phe·nol·phthal·ein

phenolphthalein

 
pronunciation:
fi nal theI lin [or] fi nal theI li ihn [or] fi nal thae lin [or] fi nal thae li ihn
part of speech: noun
definition: a white or pale yellow crystalline powder that is used in making dyes and as an acid-base indicator and a laxative.