phenolphthalein
noun
- chemical compound
Wiktionary
Pronunciation: /ˌfiː.nɒlˈ(f)θa.liːn/ / /ˌfiː.nɒlˈ(f)θeɪ.liːn/ / /ˌfi.nl̩ˈθæl.i.ɪn/
noun
Etymology: From phenol + phthalein.
- 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.