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Meaning of vexillum

vex•il•lum

Pronunciation: (vek-sil'um), [key]
— pl. vex•il•la
  1. a military standard or flag carried by ancient Roman troops.
  2. a group of men serving under such a standard.
  3. video frequency.
  4. the large upper petal of a papilionaceous flower. See diag. under
  5. the web or vane of a feather.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.