1.NounA plant (Lonchocarpus urucu, now Deguelia rufescens var. urucu) native to parts of northern South America used as a poison for fishing and an insecticide.
2.NounAn evergreen (Jacquinia barbasco, now Jacquinia arborea)
3.NounOne of several inedible wild Mexican yams (Dioscorea mexicana and Dioscorea composita) from which progesterone can be synthesized.