Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of phthalyl is as below...

Phthalyl :: Phthalyl (n.) The hypothetical radical of phthalic acid.

Phthalide :: Phthalide (n.) A lactone obtained by reduction of phthalyl chloride, as a white crystalline substance; hence, by extension, any one of the series of which phthalide proper is the type..

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