| 释义 | phthalein \ˈthalēə̇n, -āl-, -ˌlēn\ noun
 also phthalein dye
 (-s)
 Etymology: International Scientific Vocabulary phthal- + -ein
 : any of a group of xanthene dyes (as phenolphthalein, fluorescein, rhodamine) that are intensely colored in alkaline solution and are obtained by condensation of phenols with phthalic anhydride
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