Sundrops \Sun"drops`\, n. [Sun + drop.] (Bot.) Any one of the several species of {Kneiffia}, esp. {K. fruticosa} (syn. {[OE]nothera fruticosa}), of the Evening-primrose family, having flowers that open by daylight.
Oenothera fruticosa n : a day-flowering biennial or perennial of the genus Oenothera [syn: {sundrops}]