Ter`pe*nyl"ic (?), a. [Terpene + -yl + -ic.] Chem.
Of, pertaining to, or designating, an acid, C8H12O4 (called also terpentic acid), homologous with terebic acid, and obtained as a white crystalline substance by the oxidation of oil of turpentine with chromic acid.
© Webster 1913.