Толковый словарь английского языка - phenolphthalein
Phenolphthalein
phenolphthalein
noun Etymology: International Scientific Vocabulary phenol + phthalein any of various xanthene dyes, from phthalic acid Date: 1875 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
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n. Chem. a white crystalline solid used in solution as an acid-base indicator and medicinally as a laxative. Etymology: PHENOL + phthal f. NAPHTHALENE + -IN ...Толковый словарь английского языка Oxford English Reference
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