Webster's Revised Unabridged Dictionary · 1913

Vexillar

Vexillar

[Compare French vexillaire, Latin vexillarius a standard bearer.]

1.
Of or pertaining to an ensign or standard.
2.
(Botany) Of or pertaining to the vexillum, or upper petal of papilionaceous flowers.
Collocations (1)
Vexilary aestivation (Botany) , a mode of aestivation in which one large upper petal folds over, and covers, the other smaller petals, as in most papilionaceous plants.

Also: Vexillary