a substance that causes physiological or psychological dependence

the addictive drug found in tobacco leaves

a drug that increases the action of the central nervous system, the heart, and other organs

a cancer-causing substance

a thick, sticky, dark fluid produced when tobacco burns

a colorless, odorless, and poisonous gas

tobacco that is sniffed through the nose, held in the mouth, or chewed

thickened, white, leathery-looking spots on the inside of the mouth that can develop into oral cancer

the process that occurs in the body when nicotine, an addictive drug, is no longer used

a product that delivers small amounts of nicotine into the user's system while he or she is trying to give up the tobacco habit

air that has been contaminated by tobacco smoke

the smoke exhaled from the lungs of a smoker

the smoke from the burning end of a cigarette, pipe, or cigar