NCI Dictionary of Cancer Terms
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smokeless tobacco (SMOKE-les tuh-BA-koh)
A type of tobacco that is not smoked or burned. It may be used as chewing tobacco or moist snuff, or inhaled through the nose as dry snuff. Smokeless tobacco contains nicotine and many harmful, cancer-causing chemicals. Using it can lead to nicotine addiction and can cause cancers of the mouth, esophagus, and pancreas. It may also cause heart disease, gum disease, and other health problems.