vex·il·lum
| \ vek-ˈsi-ləm
\
\
plural vexilla\
vek-ˈsi-lə
\
\
Definition of vexillum
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 sense 2b, wing sense 2e(2)
Other Words from vexillum
vexillary
\
ˈvek-sə-ˌler-ē
\
adjective
\
adjective
a vexillary corolla
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“Vexillum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vexillum. Accessed 15 Apr. 2021.
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Time Traveler for vexillum
The first known use of vexillum was in 1683
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