bo·​ron | \ ˈbȯr-ˌän How to pronounce boron (audio) \

Definition of boron

: a metalloid chemical element that is found in nature only in combination and that is used especially in borosilicate glass and detergents — see Chemical Elements Table

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Other Words from boron

boronic \ bȯr-​ˈä-​nik How to pronounce boron (audio) \ adjective

Examples of boron in a Sentence

Recent Examples on the Web West of Silver Peak, the Rhyolite Ridge Project would extract lithium and boron from the ridge by drilling and blasting ore, crushing it and then drawing the minerals out with diluted sulfuric acid, according to the company’s website. Stephanie Ebbs, Ginger Zee, Jon Schlosberg, ABC News, "Nevada sees lithium ‘white gold rush’ as demand set to skyrocket," 23 Apr. 2021 The wildflower is found only on 10 acres (4 hectares) at Rhyolite Ridge where the Australian mining company, Ioneer Ltd., wants to dig for lithium and boron on federal land about 220 miles (354 kilometers) southeast of Reno. Scott Sonner, Star Tribune, "Judge sets deadline for rare Nevada plant-listing decision," 22 Apr. 2021 The weakness of the aluminum compared with the steel used in conventional cars is made up for with what some might call overengineering: early versions of the Model S had boron-steel inserts in the side panels secured with aerospace-grade bolts. David Biello, Scientific American, "How Tesla Motors Builds One of the World's Safest Cars," 23 Sep. 2013 The results were conclusive: Nearly all of Indiana's pits had been releasing a dangerous mix of heavy metals and toxic chemicals such as arsenic, boron, lead and mercury. Sarah Bowman, The Indianapolis Star, "Other states are making utilities dig up toxic coal ash. Indiana is letting it sit there.," 11 Feb. 2021 For example, in Michigan City, 94% of groundwater samples exceeded limits for arsenic, 33% for thalium, 17% for boron. Meredith Colias-pete,, "Indiana plans for coal ash cleanup insufficient, report says," 12 Dec. 2020 About 40 percent of its airframe is titanium and boron composites. Kevin Brown, Popular Mechanics, "A Fighter Pilot's Fighter Plane: PM Meets the F-15," 19 Nov. 2020 In the case of the sun, 99 percent of its energy comes from proton-proton fusion, which can create beryllium, lithium and boron before breaking them down into helium. NBC News, "For the first time, scientists detect the ghostly signal that reveals the engine of the universe," 25 Nov. 2020 Those wells contained mercury, boron, calcium, sulfate and barium — all of which are potential indicators of coal ash contaminants. ProPublica, "A Power Company’s Quiet Land-Buying Spree Could Shield It From Coal Ash Cleanup Costs," 24 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boron.' 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 boron

1812, in the meaning defined above

History and Etymology for boron

borax + -on (as in carbon)

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Statistics for boron

Last Updated

5 May 2021

Cite this Entry

“Boron.” Dictionary, Merriam-Webster, Accessed 5 May. 2021.

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More Definitions for boron


bo·​ron | \ ˈbȯr-ˌän How to pronounce boron (audio) \

Kids Definition of boron

: a powdery or hard solid chemical element that is used especially in making glass and detergents


bo·​ron | \ ˈbō(ə)r-ˌän, ˈbȯ(ə)r- How to pronounce boron (audio) \

Medical Definition of boron

: a trivalent metalloid element found in nature only in combination and used in metallurgy and in composite structural materials symbol B — see Chemical Elements Table

Other Words from boron

boronic \ bȯr-​ˈän-​ik, bōr-​ How to pronounce boron (audio) \ adjective

More from Merriam-Webster on boron

Nglish: Translation of boron for Spanish Speakers Encyclopedia article about boron

Comments on boron

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