\Eu"phra*sy\, n. [NL. euphrasia, fr. Gr. ? delight, fr.
? to delight; ? well + ? heart, mind: cf. LL. eufrasia, F.
eufrasie.] (Bot.)
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.