Are yams and sweet potatoes the same?
poisonous alkaloid found in tobacco leaves, 1819, from French nicotine, earlier nicotiane, from Modern Latin Nicotiana, formal botanical name for the tobacco plant, named for Jean Nicot (c.1530-1600), French ambassador to Portugal, who sent tobacco seeds and powdered leaves back to France 1561. His name is a diminutive of Nicolas.
nicotine nic·o·tine (nĭk'ə-tēn')
A colorless, poisonous alkaloid derived from the tobacco plant and used as an insecticide. It is the substance in tobacco to which smokers can become addicted.
A poisonous chemical substance found in the tobacco plant.