Terephthalic \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}.
[1913 Webster]