vexillātĭo, ōnis, f. [vexillum].
I A body of the vexillarii; acc. to others, a body of soldiers united under one flag (vexillum), a corps , battalion , Suet. Galb. 20; Inscr. Orell. 845; 2009 sq. al.—
II A division of cavalry , a troop , squadron , Veg. Mil. 2, 1; Amm. 25, 1, 9; Ap. Met. 7, 7, 20.