phenolphthalein

English

Etymology

From phenol +‎ phthalein.

Pronunciation

  • (Received Pronunciation) IPA(key): /ˌfiː.nɒlˈ(f)θa.liːn/, /ˌfiː.nɒlˈ(f)θeɪ.liːn/
  • (General American) IPA(key): /ˌfi.nl̩ˈθæl.i.ɪn/, /ˌfi.nl̩ˈθæˌlin/, /ˌfi.nl̩ˈθeɪˌlin/

Noun

phenolphthalein (countable and uncountable, plural phenolphthaleins)

  1. (organic chemistry, pharmacology) A white or yellowish-white crystalline compound C20H14O4 used in medicine as a laxative and in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids.

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