I. Decimus, a Roman praenomen, abbrev. D. In the gens Claudia it was given only to patricians; but among the Junii and Laelii to plebeians also; cf. Varr. L. L. 9, § 61 Müll.—Hence, Dĕcĭmiānus , a, um, adj., named for Decimus: “pirus,” Plin. 15, 15, 16, § 54.—
II. Decima, the goddess that presides over accouchements, a partus tempestivi tempore, Varr. and Caesel. ap. Gell. 3, 16, 10 sq.; cf. also Tert. Anim. 37; id. adv. Val. 32.