Online Google Dictionary

nicotine 中文解釋 wordnet sense Collocation Usage
Noun
/ˈnikəˌtēn/,
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A toxic colorless or yellowish oily liquid that is the chief active constituent of tobacco. It acts as a stimulant in small doses, but in larger amounts blocks the action of autonomic nerve and skeletal muscle cells. Nicotine is also used in insecticides,
  1. A toxic colorless or yellowish oily liquid that is the chief active constituent of tobacco. It acts as a stimulant in small doses, but in larger amounts blocks the action of autonomic nerve and skeletal muscle cells. Nicotine is also used in insecticides


  1. an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide
  2. Nicotine is an alkaloid found in the nightshade family of plants (Solanaceae) that constitutes approximately 0.6–3.0% of dry weight of tobacco, with biosynthesis taking place in the roots and accumulation occurring in the leaves. ...
  3. An alkaloid (C10H14N2), commonly occurring in the tobacco plant. In small doses it is a habit-forming stimulant; in larger doses it is toxic and is often used in insecticides
  4. The addictive drug in tobacco. Nicotine activates a specific type of acetylcholine receptor.
  5. a stimulant drug and a main component in tobacco. Nicotine is highly addictive and reaches the brain seconds after puffing a cigarette, immediately causing an increase in blood pressure and pulse in some people. ...
  6. The main active ingredient of tobacco. Extremely toxic and causing irritation of lung tissues, constriction of blood vessels, increased blood pressure and heart rate, and, in general, central nervous system stimulation.
  7. the drug in tobacco leaves. Whether someone smokes, chews, or sniffs tobacco, he or she is delivering nicotine to the brain. Each cigarette contains about 10 milligrams of nicotine. According to the National Institute on Drug Abuse, more than 3. ...
  8. Nicotine is one of thousands of chemicals found in tobacco. It acts primarily on the brain. Nicotine is the major factor responsible for addiction to cigarettes and other tobacco products. ...
  9. (NIK-uh-teen) — A drug that is found in cigarettes. Nicotine can be harmful to a developing baby.
  10. An addictive, poisonous alkaloid chemical found in tobacco. It is also a stimulant that increases heart rate and oxygen use by cardiac muscle. Nicotine is also used as an insecticide. The lethal dose for a human adult is about 50mg.
  11. (active constituent of tobacco) — named after Jean Nicot (French ambassador to Portugal, who introduced tobacco to France)
  12. The psychoactive substance in cigarettes that is both a stimulant and a depressant.
  13. A liquid alkaloid obtained from the dried leaves of the tobacco plant Nicotiana tabacum first synthesized in 1904. Nicotine is an extremely poisonous drug where a few drops in the stomach may be sufficient to cause death due to respiratory paralysis. ...
  14. Nicotine is a naturally occurring organic compound in the same family of substances (alkaloids) as Caffeine. ...
  15. One of the active and potentially poisonous ingredients in tobacco. It directly stimulates the nervous system.
  16. a powerful central nervous system stimulant contained in tobacco
  17. a harmful drug found in all tobacco products
  18. An alkaloid (chemical substance) derived from the tobacco plant that is responsible for smoking's psychoactive and addictive effects. It is toxic at high doses but can be safe and effective as a medicine at lower doses.
  19. A naturally occurring substance in plants, including tobacco.
  20. Smoke 'em if you got 'em. See also: Secondhand Smoking Hoax
  21. Nicotine is extracted from tobacco and can be used as an insecticide, often in the form of nicotine sulphate. It is apparently a stable insecticide. However, it is toxic to humans and is generally avoided for this reason.
  22. In it's most pure state, it is colorless and extremely poisonous. It smells like tobacco. Tobacco contains only a small amount of nicotine. The cigar leaf only contains about 2 percent nicotine.
  23. an organic chemical found in the tobacco plant described as a "potent" nerve poison and is used as ingredient for may insecticides. Taken in small doses through smoking tobacco products like cigarettes or cigars, it affects the nervous systems. It is also highly-addictive. ...
  24. The addictive substance found in tobacco.
  25. A colorless, oily chemical found in tobacco that makes people physically dependent on smoking. It is poisonous in large doses.