Merriam-Webster Collegiate Dictionary - tubocurarine

 noun  Etymology: International Scientific Vocabulary tubo- (from Latin tubus tube) + curare + -ine; from its being shipped in sections of hollow bamboo  Date: 1898 a toxic alkaloid or its crystalline hydrochloride salt C37H42Cl2N2O6 that is obtained chiefly from the bark and stems of a South American vine (Chondrodendron tomentosum of the family Menispermaceae) and in its dextrorotatory form constitutes the chief active constituent of curare and is used especially as a skeletal muscle relaxant