hal·​o·​gen | \ ˈha-lə-jən How to pronounce halogen (audio) \

Definition of halogen

 (Entry 1 of 2)

: any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic molecules



Definition of halogen (Entry 2 of 2)

: containing, using, or being a halogen a halogen lamp

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Other Words from halogen


halogenous \ ha-​ˈlä-​jə-​nəs How to pronounce halogen (audio) \ adjective

Examples of halogen in a Sentence

Recent Examples on the Web: Noun This is for use with up to 150 Watts of dimmable LEDs and up to 600 Watts for incandescent or halogen bulbs. Chris Hachey, BGR, "Best Dimmer Light Switch," 26 Apr. 2021 The Palisade received a Good rating for its standard LED Projector high- and low-beam headlights, where the lower trim Telluride's halogen projectors were given a Poor rating. Austin Irwin, Car and Driver, "Every New 2021 Crossover and SUV with the Best Safety Ratings," 13 Apr. 2021 The room became so quiet that for the first time Chowdhury noticed the slight buzzing of the halogen light bulbs overhead. Elliot Ackerman, Wired, "2034, Part I: Peril in the South China Sea," 26 Jan. 2021 In late 2019, his administration blocked an energy efficiency rule that would have banned the sale of most halogen and incandescent bulbs on Jan. 1, 2020. Washington Post, "Trump’s big policy win: stronger showers, faster dishwashers. It’s something almost no one asked for," 30 Dec. 2020 Outside, the city of Colombo was coming to a crawl of traffic lights and halogen, the shops winking out, one by one, as curfew regulations loomed. Yudhanjaya Wijeratne, Wired, "The Future of Work: ‘Work Ethics,’ by Yudhanjaya Wijeratne," 13 Nov. 2020 The rig also comes equipped with heated hand grips, a halogen light, and drift cutters. Bradley Ford, Popular Mechanics, "The Best Snowblowers for Digging Yourself Out," 9 Sep. 2020 The range starts with the $28,595 GTI S, which comes with cloth seats (in the now-traditional plaid), a 6.5-inch infotainment system, and halogen headlights. Jonathan M. Gitlin, Ars Technica, "The 2020 VW Golf GTI proves you shouldn’t overcomplicate an icon," 8 June 2020 Halogen Coming in somewhere between incandescent bulbs and fluorescent ones on the energy-efficiency spectrum, halogen bulbs produce an artificial light that’s most similar to natural light, which is certainly better for your health. Stefanie Waldek, House Beautiful, "The 6 Main Types of Light Bulbs and How to Use Them in Your Home," 1 Apr. 2020 Recent Examples on the Web: Adjective While halogen filaments deliver 360-degree illumination, LED bulbs typically emit light with a pair of back-to-back 180-degree planes. Daniel Gray, Ars Technica, "How do we stop people from blinding other drivers with aftermarket LEDs?," 16 Mar. 2020 On Home Depot’s website, the group found different prices quoted for paint, light bulbs, toilet paper, caulk guns, halogen floor lamps, screwdrivers and more. Levi Sumagaysay, The Mercury News, "FTC urged to probe ‘secret surveillance scores’ used against shoppers, job and housing applicants," 25 June 2019 Test Results: Maximum Cubby Storage Exterior Measurement Comparisons Every 124 Spider comes standard with a manual softtop that’s effortless to fold down, plus halogen headlights and LED taillights. Car and Driver, "2018 Fiat 124 Spider," 2 Nov. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'halogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of halogen


1842, in the meaning defined above


1880, in the meaning defined above

History and Etymology for halogen


Swedish, from hal- + -gen

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Learn More about halogen

Time Traveler for halogen

Time Traveler

The first known use of halogen was in 1842

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Statistics for halogen

Last Updated

10 May 2021

Cite this Entry

“Halogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/halogen. Accessed 15 May. 2021.

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More Definitions for halogen


halo·​gen | \ ˈhal-ə-jən How to pronounce halogen (audio) \

Medical Definition of halogen

: any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VII A of the periodic table and exist in the free state normally as diatomic molecules

Other Words from halogen

halogenous \ ha-​ˈläj-​ə-​nəs How to pronounce halogen (audio) \ adjective

More from Merriam-Webster on halogen

Britannica.com: Encyclopedia article about halogen

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