nicotine
noun
nic·o·tine
ˈni-kə-ˌtēn 
: a poisonous alkaloid C10H14N2 that is the chief active principle of tobacco and is used as an insecticide
Examples of nicotine in a Sentence
Recent Examples on the Web
At the same time, vaping among teens has surged, introducing nicotine and acidic chemicals that erode enamel, inflame gums, and increase long-term oral health risks.
—
Sun Sentinel Editorial Board, Sun Sentinel, 14 Jan. 2026
The apps worked best when added to traditional methods like medication (nicotine patches or pills) or behavioral counseling.
—New Atlas, 13 Jan. 2026
The Town of Amherst was the most recent to adopt the policy, with Brookline becoming the first to do so in 2020, banning anyone born after January 1, 2000 from being able to buy nicotine and tobacco products.
—Tim Dunn, Boston Herald, 8 Jan. 2026
The permits suspensions bar the market from conducting lottery sales and from selling over-the-counter medications and vape or nicotine products.
—Justin Muszynski, Hartford Courant, 7 Jan. 2026
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Cite this Entry
“Nicotine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nicotine. Accessed 20 Jan. 2026.
Kids Definition
nicotine
noun
nic·o·tine
ˈnik-ə-ˌtēn
: a poisonous substance found in tobacco and used as an insecticide
Medical Definition
nicotine
noun
nic·o·tine
ˈnik-ə-ˌtēn
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