Definition of papoose root in US English:

papoose root

noun

  • A North American plant, Caulophyllum thalictroides (family Berberidaceae), bearing panicles of small yellowish flowers and blue berries; also called blue cohosh; (also) the thick, twisted root of this plant, used in herbal medicine as a diuretic, emmenagogue, etc.

Origin

Early 19th century.