Vex*il"lum (?), n.; pl. Vexilla (#). [L., a standard, a flag.]
1. Rom. Antiq. (a)
A flag or standard.
(b)
A company of troops serving under one standard.
2. Eccl. (a)
A banner.
(b)
The sign of the cross.
3. Bot.
The upper petal of a papilionaceous flower; the standard.
4. Zool.
The rhachis and web of a feather taken together; the vane.
© Webster 1913.