I.a member of a college, commission, or board of fifteen men for any official function. — Usually in plur.: quindĕcimvĭri , gen. ūm and ōrum, the college or board of fifteen men, the fifteen. So esp.,
I. In Rome, the quindecimviri Sibyllini or sacris faciundis, a college of priests who had charge of the Sibylline books, from which, in times of danger, they divined the means of averting the peril by religious rites, Hor. l. l.; Tac. A. 6, 12 fin.; Inscr. Orell. 1100; 2263 sq.; 2351.— Gen. plur.: “quindecimvirum, Tac. l. l.: quindecemvirum conlegi magister,” Plin. 28, 2, 3, § 12.—Sing.: “L. Cotta quindecimvir sententiam dicturus,” Suet. Caes. 79; Tac. A. 6, 12, 1: “quindecimvir sacris faciundis,” Gell. 1, 12. —
II. Quindecimviri agris dandis, fifteen commissioners for apportioning lands, Plin. 7, 43, 45, § 139.