euphrasia

 
Pronunciation: /juːˈfreɪzɪə/

noun

  • a plant of the genus Euphrasia in the figwort family, especially eyebright.
  • [mass noun] a preparation of eyebright used in herbal medicine and homeopathy, especially for treating eye problems.

Origin:

early 18th century: via medieval Latin from Greek, literally 'cheerfulness', from euphrainein 'gladden the mind'