Definition of quinine bush in US English:

quinine bush

noun

  • 1US either of two bitter shrubs of the family Garryaceae, Garrya fremontii and G. elliptica, extracts of which were formerly used medicinally in place of quinine.

  • 2Australian= quinine tree.

Origin

Late 19th century; earliest use found in Robert Bentley (1821–1893), botanist and pharmacognosist.