n. an Australian shrub, Duboisia hopwoodii, whose leaves have traditionally been used for their stimulant, analgesic, and hallucinogenic effects by members of Aboriginal tribes. The primary active ingredient is nicotine. Although some indigenous peoples still use pituri, it was most popular during the 19th and early 20th centuries. The leaves were cured, powdered, and then rolled into a quid to be chewed or smoked.