phenolphthalein

noun phe·nol·phtha·lein \ ˌfē-nᵊl-ˈtha-lē-ən , -ˈtha-ˌlēn , -ˈthā- \

Definition of phenolphthalein

: a white or yellowish-white crystalline compound C20H14O4 used in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids and in medicine as a laxative

Origin and Etymology of phenolphthalein

International Scientific Vocabulary phenol + phthalein any of various xanthene dyes, from phthalic acid


Medical Dictionary

phenolphthalein

noun phe·nol·phtha·lein \ ˌfēn-ᵊl-ˈthal-ē-ən , -ˈthal-ˌēn , -ˈthāl- \

medical Definition of phenolphthalein

: a white or yellowish white crystalline compound C20H14O4 that is used in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids and that is used in medicine as a laxative

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