Ăbŏrīgĭnes

the primeval Romans, the Aborigines, the nation which, previous to historical record, descended from the Apennines, and, advancing from Carseoli and Reate into the plain, drove out the Siculi; the ancestors of the Romans, Cato ap. Serv. ad Verg. A. 1, 6; Varr. L. L. 5, § 53 Müll.; Cic. Rep. 2, 3; Sall. C. 6; Liv. 1, 1.

Used as an appellative, original inhabitants, Plin. 4, 21, 36, § 120: Indigenae sunt inde ... geniti, quos vocant aborigines Latini, Graeci αὐτόχθονας, Serv. ad Verg. A. 8, 328.—

Hence, ăbŏrīgĭnĕus, a, um, adj., aboriginal: sacellum, Ter. Maur. p. 2425 P.