Definition of phthalein in English:

phthalein

(also phthaleine, phthaleïne)

noun

Chemistry
  • Any of a series of organic dyes produced by replacing the oxygen atom of one of the C=O groups of phthalic anhydride by two (substituted) phenyl groups. Frequently attributive, especially in "phthalein dye".

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. From phthal- + -ein, after German Phtaleïn.

Pronunciation

phthalein

/ˈ(f)θeɪlɪiːn//ˈ(f)θalɪɪn//ˈ(f)θeɪlɪɪn/