1. a flag or banner, especially one used as a military or ceremonial standard
Usage: formal; historical
2. the upper petal of a flower in the pea family that stands upright like a banner
Usage: botanical

Examples

• The Roman legion carried its vexillum into battle.
• Each military unit had its own distinctive vexillum.
• The ceremonial vexillum was displayed during the parade.
• The botanist pointed out the vexillum of the sweet pea flower.
• Ancient vexilla were often decorated with eagles or other symbols.
• The vexillum of the lupine flower is typically the largest petal.