plural -s
: any of a group of colorless compounds obtained by reduction of the phthaleins into which they are easily reconverted by oxidation
especially : the compound C20H16O4 from phenolphthalein

Word History


International Scientific Vocabulary phthal- + -in

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Dictionary Entries Near phthalin

Cite this Entry

“Phthalin.” Dictionary, Merriam-Webster, Accessed 19 Jul. 2024.

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