funditor

fundĭtor, ōris, m. [funda],

one who fights with a sling , a slinger , σφενδονίτης, a sort of light-armed soldier (cf.: jaculator, sagittarius), Caes. B. G. 2, 7, 1; 2, 10, 1; 2, 19, 4; 2, 24, 4 et saep.; Sall. J. 46, 7; 49, 6 al.