Vexillum \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.
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2. (Eccl.)
(a) A banner.
(b) The sign of the cross.
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3. (Bot.) The upper petal of a papilionaceous flower; the
standard.
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4. (Zool.) The rhachis and web of a feather taken together;
the vane.
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