
1) Petal
Found on
https://www.crosswordclues.com/clue/vexillum

Latin, meaning: flag, banner, standard / troop, company, small unit.
Found on
http://archives.nd.edu/vvv.htm
[gastropod] Vexillum is a genus of small to medium-sized sea snails, marine gastropod mollusks in the family Costellariidae. Species within the genus Vexillum include: ...
Found on
http://en.wikipedia.org/wiki/Vexillum_(gastropod)

• (n.) A company of troops serving under one standard. • (n.) A banner. • (n.) The rhachis and web of a feather taken together; the vane. • (n.) A flag or standard. • (n.) The upper petal of a papilionaceous flower; the standard. • (n.) The sign of the cross.
Found on
http://thinkexist.com/dictionary/meaning/vexillum/

Standard with a flag on a crossbar.
Found on
http://www.encyclo.co.uk/local/20764

The vexillum was a standard which was a square piece of cloth, probably ca. 50 sq. cm, suspended from a cross-bar attached to a pole and decorated with a hem and fringe. It carried the name of the legion or detached unit, however it was a type of standard more commonly born by cavalry. The senior standard-bearer of an ala was known as the vexillari…...
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Vex·il'lum noun ;
plural Vexilla . [ Latin , 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.
...Found on
http://www.encyclo.co.uk/webster/V/21

vexillum (vek SIGHL uhm) (s), vexilla (pl) 1. In ancient Rome, a military standard, flag, or banner; or the troops serving under a separate standard. 2. In Roman antiquity, a square flag, hanging transversely from the end of a spear by a wooden crosspiece, used especially by the calvary. 3. A company of troops serving under one standard; e...
Found on
http://www.wordinfo.info/words/index/info/view_unit/2294/2
No exact match found.