noun Oe·no·thera \ˌēnəˈthirə, ēˈnäthərə\

Definition of Oenothera

  1. :  a genus of mostly North American annual or biennial herbs (family Onagraceae) having usually nocturnal yellow flowers with erect buds and terete seeds in two rows in a capsule — see evening primrose, kneiffia

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Origin and Etymology of oenothera

New Latin, from Latin oenothera, onothera, a plant of the genus Epilobium, from Greek oinothēras, onothēras

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to cast off or become cast off

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