euphrasia
Concise Oxford English Dictionary © 2008 Oxford University Press:
euphrasia /juːˈfreɪzɪə/
▶noun eyebright or a related plant, especially as a herbal or homeopathic remedy for eye problems. [Genus Euphrasia.]
– origin C18: via med. L. from Gk, lit. ‘cheerfulness’.
'euphrasia' also found in these Oxford entries:

