Eu″phra‐sy (ū″frȧ‐sy̆), n. [NL. euphrasia, fr. Gr. ευφρασἴα delight, fr. ευφραἴνειν to delight; εὐ̑ well + φρήν heart, mind: cf. LL. eufrasia, F. eufraise.] (Bot.) The plant eyebright (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.