nicotine

/'nikəti:n/

Thân thiện

A scientist carefully measures a small amount of nicotine in a laboratory.

Definition

1. Noun:
   • A toxic alkaloid found in tobacco: Nicotine is a naturally occurring chemical compound present in the leaves of the tobacco plant (Nicotiana tabacum). It is a potent neurotoxin and is the primary addictive substance in tobacco products like cigarettes, cigars, and vaping liquids.
   • A substance used in medicine and pest control: Historically and in controlled contexts, nicotine has been used in some medicinal products (e.g., nicotine replacement therapies for smoking cessation) and as an insecticide due to its toxicity to insects.

Examples of Usage

• Noun:
  • The addictive properties of cigarettes are primarily due to nicotine.
  • Nicotine patches deliver a controlled dose to help reduce cravings.
  • This insecticide contains a synthetic form of nicotine.

Advanced Usage

• "Nicotine dependence/addiction": The compulsive need to use tobacco products, driven by the body's adaptation to nicotine.
  • Overcoming nicotine addiction often requires a combination of behavioral therapy and medication.
• "Nicotine withdrawal": The set of physical and psychological symptoms (e.g., irritability, anxiety, cravings) that occur when a dependent person stops using nicotine.
  • Nicotine withdrawal symptoms typically peak within the first few days.

Variants and Related Words

• Nicotinic (adj): Pertaining to nicotine or its effects. Often used in scientific contexts like "nicotinic acetylcholine receptors," which are the brain receptors nicotine binds to.
  • Nicotinic receptors play a key role in the addictive process.
• Nicotinism (n): A dated term for nicotine poisoning or the condition caused by chronic nicotine use.

Synonyms

• Alkaloid: A class of naturally occurring organic compounds that contain nitrogen, many of which have pharmacological effects. Nicotine is one specific alkaloid.
• Neurotoxin: A substance that is poisonous or destructive to nerve tissue. Nicotine acts as a neurotoxin, especially in high doses.

Related Phrases

• "Nicotine fix" (informal idiom): The act of consuming tobacco or nicotine to satisfy a craving.
  • He stepped outside for a quick nicotine fix.
• "Nicotine-stained": Discolored or yellowed from exposure to tobacco smoke.
  • The walls of the old pub were nicotine-stained.

Học thuật

Noun

1. an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide