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n. pl. vex·il·la (vĕk-sĭl′ə)
1. A usually square banner hung from a crossbar on a staff, used as a military standard in ancient Rome.
2. Botany See standard.
3. Zoology The weblike part of a feather; the vane.

[Latin, banner; akin to vēlum, sail.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -la (-lə)
1. (Zoology) ornithol the vane of a feather
2. (Botany) botany another name for standard16
[C18: from Latin: banner, perhaps from vēlum sail]
ˈvexillary, vexˈillar adj
ˈvexillate adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(vɛkˈsɪl əm)

n., pl. vex•il•la (vɛkˈsɪl ə)
1. a standard or flag carried by ancient Roman troops.
3. Ornith. vane (def. 5).
[1720–30; < Latin of vēlum sail]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


1. a military Standard or banner carried by ancient Roman troops.
2. the men serving under such a banner.
See also: Flags
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Exploring biotic impacts from Carcinus maenas predation and Didemnum vexillum epibiosis on Mytilus edulis in the Gulf of Maine.
Individuals from Sangha-Mbaere are closely related to Chlidonoptera vexillum, which was described from Cameroon and is known from other regions of Central Africa, and Chlidonoptera lestoni which to date is known only from Ghana.
ne dimissis quidem finem esse militiae, sed apud vexillum
Assessment of chemical treatments for controlling Didemnum vexillum, other biofouling, and predatory sea stars in Pacific oyster aquaculture.
+5 RACE RATING h 8 Sep 28 Newton Abbot 2m1f Hcp Hdl 1.Bulletproof 2.Bumble Bay 3.Hold The Fort 10 ran Record of first five: 2 wins from 4 runs - Bulletproof, Vexillum = +4 Record of last five: 1 win from 4 runs - East Hill = +1 Total record: 3 wins from 8 runs (37%) for a profit of +PS21 to PS1 levels.
4 mm longus, dense nigro-strigosus; corolla luteo-viridula, vexillum obovatum 9-11 mm longum; stamina 6-7 mm longa; fructus sessilis deflexus oblongus rectus vel fere rectus, 10-13 mm longus, luteolus strigosus omnino bilocularis, ex apice dehiscens; semina plerumque 4 per loculum, 1.5-1.8 mm longa opaca.
Likewise, high toxicities were also observed in those bivalve species, Atrina vexillum, Pinna bicolor, and Pinna muricata, obtained from the sea grasses of sites 1 and 2.
And it was volunteers in a community-based monitoring program in Sitka who discovered one of the most dangerous of Alaska's known marine invasive species, the glove leather tunicate (Didemnum vexillum).
Dwi'n cofio gweld un o'r rhain, sef y chwistrell for garped (Didemnum vexillum; sea squirt), oedd wedi cyrraedd marina Caergybi yn 2008.