TOBACCO. Now used recreationally throughout the world, tobacco originated in South America as long as eight thousand years ago as a product of two cultivated hybrid species of the genus Nicotiana, N. rustica and N. tabacum. The genus, which belongs to...

Tobacco generally refers to the leaves and other parts of certain South American plants used by Native Americans because of the nicotine the plant contains. Tobacco plants are a species of the genus Nicotiana, belonging to the Solanaceae (nightshade)...

Tobacco generally refers to the leaves and other parts of certain South American plants that were domesticated and used by Native Americans for the alkaloid NICOTINE. Tobacco plants are a species of the genus Nicotiana, belonging to the Solanaceae...

When Christopher Columbus (1451-1506) reached America, he found that the Native Americans who had occupied the land for thousands of years were already using tobacco in much the same ways it is used today. The tobacco plant is native to America,...

Tobacco, Nicotiana tabacum (family Solanaceae), is grown in over one hundred countries around the world, in both temperate and tropical climates. It is a stout, rapidly growing annual, 1 to 2 meters tall. It has large, ovate to oblong leaves and...

Tobacco (Nicotiana tabacum) is an herbaceous plant cultivated around the world for its leaves, which can be rolled into cigars, shredded for cigarettes and pipes, processed for chewing, or ground into snuff. Tobacco leaves are the source of...

Dried leaves of the plant Nicotiana tabacum. Tobacco is smoked in cigarettes or cigars, chewed, or taken intranasally as snuff. The active ingredient in tobacco is NICOTINE, a mild stimulant (see STIMULANTS) that is responsible for tobacco’s...

Tobacco is an agricultural product processed from the fresh leaves of plants in the genus Nicotiana. Tobacco has been growing on the American continent since about 6000 BC and began being used by native cultures at about 3000 BC. It has been smoked in...