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1A plant of the genus Euphrasia in the figwort family, especially eyebright.‘The drops contain the extracts of ingredients such as aphis, or ground honey bees, and plants such as euphrasia and sabadilla.’
- 1.1mass noun A preparation of eyebright used in herbal medicine and homeopathy, especially for treating eye problems.
Early 18th century via medieval Latin from Greek, literally ‘cheerfulness’, from euphrainein ‘gladden the mind’.
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