colchicine

noun1

1. •
   A highly toxic alkaloid, chemical formula C₂₂H₂₅NO₆, originally extracted from plants of the genus Colchicum and formerly used to treat rheumatic complaints, now used mainly in the treatment of gout.

   • Gloriosa superba: spectacularly beautiful climbing lily. Roots, stalks, leaves contain an acrid narcotic, superbine, as well as colchicine and choline. Three grains of colchicine are fatal. Hawaii. — 1964