millenarius

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

millēnārĭus, a, um, adj. [milleni],

containing a thousand, millenary (postclass.): numerus, Aug. Civ. Dei, 20, 7: aevum, Tert. de Anim. 32: dux lanceariorum, commander of a thousand , Cassiod. Hist. Eccl. 6, 35.