phthalic acid

n.
A colorless crystalline organic acid, C₆H₄(COOH)₂, prepared from naphthalene and used in the synthesis of dyes, perfumes, and other organic compounds.

n.

A colorless crystalline organic acid prepared from naphthalene and used in the synthesis of dyes and other organic compounds.

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The noun has one meaning:

Meaning #1: a colorless acid used to make dyes and perfumes

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