Definition of nicotine in English:


Line breaks: nico|tine
Pronunciation: /ˈnɪkətiːn


[mass noun]
A toxic colourless or yellowish oily liquid which 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.
More example sentences
  • The nicotine in tobacco smoke causes both physical and psychological dependence.
  • These laws offer a promising framework for the regulation of nicotine, including tobacco products.
  • I understand these results are based on the amount of nicotine found in the bloodstream.


early 19th century: from French, from nicotiana + -ine4.

Definition of nicotine in: