Phthal"ide (?), n. [Phthalyl + anhydride.] Chem.

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.

[Written also phthalid.] <-- phthalic anhydride? would be classed as an acid anhydride, rather than a lactone. Obtained commercially by a different process. -->


© Webster 1913.

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