| 释义 | 
		phe·nol·phthalein \| ̷ ̷ˌ ̷ ̷+\ noun Etymology: International Scientific Vocabulary phenol + phthalein  : a white or yellowish white crystalline compound C20H14O4 formed by condensation of phthalic anhydride and phenol and used in medicine as a laxative and in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by even weak acids — compare phthalein |