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  • Deet
    Deet
    a brand of diethyltoluamide.
  • DEET
    DEET
    acronym
    diethyl(meta)toluamide; an insect repellent
  • deet
    deet
    A colorless, oily liquid that has a mild odor and is used as an insect repellent. Its chemical name is diethyl toluamide. Chemical formula: C 12 H 17 NO.

Deet

American  
[deet] / dit /
Chemistry, Trademark.
  1. a brand of diethyltoluamide.


DEET British  
/ diːt /

acronym

  1. diethyl(meta)toluamide; an insect repellent

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

deet Scientific  
/ dēt /
  1. A colorless, oily liquid that has a mild odor and is used as an insect repellent. Its chemical name is diethyl toluamide. Chemical formula: C 12 H 17 NO.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“One of the big four, which would be Deet, Picaridin, IR3535 or oil of lemon eucalyptus if you like it natural,” Hansen says.

From Los Angeles Times ● Nov. 4, 2026

Plus, the lack of any harmful chemicals such as Deet, makes me more comfortable using them.

From The Verge ● Mar. 1, 2022

“I showed people the leggings I’m wearing under my dress, like the Deet that I was spraying on my legs,” she says.

From Washington Post ● Sep. 9, 2021

I would also look into solutions that use Permethrin, which is an eco-friendly alternative to Deet.

From Seattle Times ● Oct. 12, 2020

Out of the three main characters, Emmanuel’s skill makes Deet a break-out character, closely matched by Taylor-Joy.

From Salon ● Aug. 28, 2019

Infection can be prevented by wearing long-sleeved clothing and using mosquito nets, as well as chemical insect repellents such as DEET.

From Salon ● Mar. 20, 2025

The CDC recommends using insect repellent, including DEET, if you’re pregnant or nursing.

From Los Angeles Times ● Jun. 6, 2024

Residents are urged to take anti-mosquito mitigation measures, such as using DEET, clearing out existing stagnant pools of water to prevent the laying of mosquito eggs, and keeping windows and doors closed and screened.

From Washington Times ● Aug. 19, 2023

The best step you can take to protect yourself from mosquito bites is to use an insect repellant recommended by the Environmental Protection Agency, such as DEET.

From Scientific American ● Jul. 31, 2023

Experts say the best defense against mosquitoes remains traditional repellents with ingredients like DEET, Picaridin and IR 3535.

From Seattle Times ● Jul. 6, 2023

He pulled out a bottle of deet and dabbed the poison on himself like a socialite applying Chanel.

From Salon ● Dec. 30, 2012

And to all will I say, ‘Voilá, deet efer woman haf such a frent for herself and such a second mütter for her children?’

From Janice Meredith by Paul Leicester Ford

Fie was innocent, Rowland—on my deet, he was innocent.

From Gladys, the Reaper by Anne Beale

Why deet I not it think before?” cried the baroness, boxing her own ear.

From Janice Meredith by Paul Leicester Ford

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