n.
Pronunciation: ' d ā - ˌ flau ̇ (- ə )r
Function: noun
Date: circa 1688
: any of a genus ( Commelina ) of herbs of the spiderwort family having one petal smaller than the other two especially : a blue-flowered Asian herb ( C. communis ) with the smaller petal white that has become naturalized as a weed in the U.S.