Vexillum

vek-sil′um, n. in the ancient Roman army, a standard, the troop serving under such a standard: ( eccles. ) a proce ional banner: ( bot. ) the large posterior petal of a papilionaceous flower—also Vex′il ; the web or vane of a feather:— pl. Vexill′a .— adjs. Vex′illar , Vex′illary .— ns. Vex′illary , Vex′illātor , a standard-bearer.— adj. Vex′illate , having vexilla.— n. Vexillā′tion , a company under one vexillum. [L., 'an ensign'— vehĕre , to carry.]