vexillum
noun
vex·il·lum
vek-ˈsi-ləm 
plural vexilla
vek-ˈsi-lə
1
: a square flag of the ancient Roman cavalry
2
: the web or vane of a feather
3
: the upper, large, often lobed petal of a papilionaceous flower (as of a pea or bean plant) : banner sense 6, standard sense 8a
The flowers are blue with a white patch on the vexillum (standard) which turns to purple as the flower ages …—
David Simons
compare keel entry 2 sense 2b, wing sense 2e(2)
David SimonsDictionary Entries Near vexillum
Cite this Entry
“Vexillum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vexillum. Accessed 28 Nov. 2024.
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