Definition of dayflower
: 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.
From the M-W Editors
First Known Use of dayflower
circa 1688
Learn More about dayflower
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Britannica.com: Encyclopedia article about dayflower
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