(Science: botany) The plant eyesight (euphrasia officionalis), formerly regarded as beneficial in disorders of the eyes. Then purged with euphrasy and rue The visual nerve, for he had much to see. (Milton)
Origin: NL. Euphrasia, fr. Gr. Delight, fr. To delight; well – heart, mind: cf. LL. Eufrasia, f. Eufrasie.