1. a poisonous chemical compound found in tobacco that is highly addictive

Examples

• Nicotine is the substance that makes cigarettes addictive.
• The nicotine patch helps people quit smoking by delivering small amounts of the drug.
• Tobacco plants naturally produce nicotine as a defense against insects.
• Many smokers experience withdrawal symptoms when they stop getting nicotine.
• E-cigarettes often contain nicotine in liquid form.
• The doctor explained how nicotine affects the brain’s reward system.