• (n.) Any one of the several species of Kneiffia, esp. K. fruticosa (syn. Oenothera fruticosa), of the Evening-primrose family, having flowers that open by daylight. Found on http://thinkexist.com/dictionary/meaning/sundrops/
Sun'drops` noun [ Sun + drop .] (Botany) Any one of the several species of Kneiffia , esp. K. fruticosa (syn. OEnothera fruticosa ), of the Evening-primrose family, having flowers that open by daylight. Found on http://www.encyclo.co.uk/webster/S/239