Lewis & Short

ŏrīgĭnālis, e, adj. [origo], primitive, original (post-class.): Ceres frugum parens originalis, App. M. 11, p. 257: recurram ad originales libros, Hier. in Gal. 3, 10: rerum species, Macr. Somn. Scip. 1, 2: coloni, Cod. Th. 11, 1, 14.
Hence, adv.: ŏrīgĭnālĭ-ter, originally (eccl. Lat.), Aug. Trin. 3, 9; id. Retract. 1, 15.