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By surface analysis, phthal(ic) + -ein.
Etymology from Wiktionary, CC BY-SA 4.0.
phthalein
Today it means: Any of a range of lactones formed by the reaction of phenols with phthalic anhydride. Full definition →
Today it means: Any of a range of lactones formed by the reaction of phenols with phthalic anhydride. Full definition →
By surface analysis, phthal(ic) + -ein.
Etymology from Wiktionary, CC BY-SA 4.0.