Dictionary entry

Terephthalic

Webster's Dictionary 1913

Ter′eph‐thal″ic (?), a. [Terebene + phthalic.] (Chem.) Of, pertaining to, or designating, a dibasic acid of the aromatic series, metameric with phthalic acid, and obtained, as a tasteless white crystalline powder, by the oxidation of oil of turpentine; — called also paraphthalic acid. Cf. Phthalic.