eyebright

English
The common eyebright, Euphrasia rostkoviana. Mallnitz, Austria.

Etymology

From eye +‎ bright.

Noun

eyebright (countable and uncountable, plural eyebrights)

  1. Any of the flowering plants of the genus Euphrasia, originally as used to treat eye infections. [from 16th c.]
    • 1997, Roy Porter, The Greatest Benefit to Mankind, Folio Society 2016, p. 273:
      Paracelsus had been recommending the plant eyebright for bad eyes in the sixteenth century; it was still in widespread use in the eighteenth.

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