tobacco

(redirected from tobaccos)
Also found in: Dictionary, Thesaurus, Legal, Idioms, Encyclopedia.

tobacco

 [tah-bak´o]
the dried prepared leaves of Nicotiana tabacum, an annual plant widely cultivated in the United States, the source of various alkaloids, the principal one being nicotine. See also smoking and nicotine poisoning.

to·bac·co

(tō-bak'ō),
An herb of South American origin, Nicotiana tabacum, which has large ovate to lanceolate leaves and terminal clusters of tubular white or pink flowers. Tobacco leaves contain 2-8% of nicotine and are the source of smoking and chewing tobacco or snuff. Tobacco smoke contains nicotine, carbon monoxide (4%), nitric oxide, and numerous aromatic hydrocarbons and other substances known to be carcinogens, including benzo[a]pyrene, β-naphthylamine, and nitrosamines.

Cigarette smoking is the leading preventable cause of disease and death in the U.S., being responsible for approximately 440,000 deaths (20% of all deaths) each year, and approximately $157 billion in health-related economic losses. Smoking two packages of cigarettes a day reduces life span by 8.3 years. Smoking tobacco in any form (cigarettes, cigars, pipe) is a strong independent risk factor for atherosclerosis, acute myocardial infarction, unstable angina, stroke, and sudden death. Tobacco is responsible for 81,000 deaths annually due to ischemic heart disease (including 45% of all deaths due to coronary artery disease in men under 65) and more than 50% of all strokes in both sexes before age 65. Smoking lowers HDL cholesterol and raises LDL and VLDL cholesterol, and increases the risk of intermittent claudication and aortic aneurysm. It may cause as much as a 30-fold increase in the risk of thromboembolic disease in women taking oral contraceptives. Smoking is responsible for 124,000 deaths each year due to lung cancer, and markedly increases the risk of other cancers, particularly those of the oral cavity, larynx, esophagus, kidney, bladder, uterine cervix, and pancreas. Cigarette smoking is the principal cause of chronic bronchitis and pulmonary emphysema. Involuntary or passive smoking (inhalation by nonsmokers of second-hand or sidestream smoke) causes 53,000 deaths annually, 37,000 of them due to coronary artery disease. Maternal smoking during pregnancy is associated with increased risk of miscarriage, stillbirth, and low birth weight. Children of smokers are at increased risk of sudden infant death syndrome, meningococcal meningitis, and dental caries. Use of smokeless tobacco (chewing tobacco or snuff applied to the buccal mucosa) greatly increases the risk of cancer and premalignant lesions of the oral cavity. Nicotine use is powerfully addictive, leading to habituation, tolerance, and dependency. In the U.S., 90% of smokers become habituated to tobacco before age 21 and 3,000 children begin smoking each day. The likelihood of becoming and remaining a smoker increases in inverse proportion to the number of years of education completed. Quitting smoking decreases the risk of death from all causes by 30%. Effective strategies for smoking cessation include behavior modification therapy, nicotine replacement (gum, skin patches, inhaler, nasal spray), hypnosis, and drug therapy (bupropion, clonidine, nortriptyline), but the relapse rate 3 months after smoking cessation is 60%.

tobacco

Public health Any product prepared from the dried leaves of Nicotiana tabacum, rich in the addictive alkaloid, nictoine Tobacco mortality–US ±425K/yr; cardiovascular deaths ±180K/yr; lung CA deaths ±120K/yr; 2nd-hand smoke deaths 9K/yr. See Black tobacco, Blonde tobacco, Environmental tobacco smoke, Nicotine, Smokeless tobacco, Smoking.

tobacco

Dried leaves of the plant Nicotina tabacum. Tobacco contains the drug NICOTINE for the effects of which it is smoked, chewed or inhaled as a powder (snuff). All these activities are dangerous. Cigarette smoking, in particular, is responsible for a greatly increased risk of cancer of the lung, mouth, bladder and pancreas and for an increased likelihood of chronic BRONCHITIS, EMPHYSEMA, coronary artery disease and disease of the leg arteries. Smoking is also harmful during pregnancy, leading to smaller and less healthy babies.

to·bac·co

(tŏ-bak'ō)
Herb of South American origin, Nicotiana tabacum, which has large ovate to lanceolate leaves; leaves contain 2-8% nicotine and are source of smoking tobacco, chewing tobacco, and snuff. Tobacco smoke contains nicotine, carbon monoxide (4%), nitric oxide, and numerous aromatic hydrocarbons and other substances known to be carcinogens.
References in classic literature ?
When the schooner departed, he called the kanakas down to the beach and challenged them to throw him in a wrestling bout, promising a case of tobacco to the one who succeeded.
Mauki's weekly allowance of tobacco was two sticks.
When Mauki was done, he carried the boat compass and all the rifles and ammunition down to the cutter, which he proceeded to ballast with cases of tobacco. It was while engaged in this that a hideous, skinless thing came out of the house and ran screaming down the beach till it fell in the sand and mowed and gibbered under the scorching sun.
He landed at Port Adams with a wealth of rifles and tobacco such as no one man had ever possessed before.
This man not only came out, but he brought with him seven hundred and fifty dollars in gold sovereigns--the money price of eight years and a half of labor plus the cost price of certain rifles and cases of tobacco.
The scarecrow gasped, struggled, and at length emitted a murmur, which was so incorporated with its smoky breath that you could scarcely tell whether it were indeed a voice or only a whiff of tobacco. Some narrators of this legend hold the opinion that Mother Rigby's conjurations and the fierceness of her will had compelled a familiar spirit into the figure, and that the voice was his.
It might be apprehended, however, that as the life of the illusion seemed identical with the vapor of the pipe, it would terminate simultaneously with the reduction of the tobacco to ashes.
'Dickon, a fresh pipe of tobacco!' and, 'Dickon, another coal for my pipe!' and have it into thy pretty mouth as speedily as may be.
While thus muttering, the witch had filled a fresh pipe of tobacco, and held the stem between her fingers, as doubtful whether to thrust it into her own mouth or Feathertop's.
'Tis an innocent and useful vocation, and will suit my darling well; and, if each of his human brethren had as fit a one, 't would be the better for mankind; and as for this pipe of tobacco, I need it more than he."
Then there is the blend--a combination of tobaccos with contrasting flavors in what ultimately becomes a marriage.
But anti-tobacco activists say the settlement McPherson and his colleagues were pushing on tobaccos behalf was not in the public interest and never was.