bo·​ron ˈbȯr-ˌän How to pronounce boron (audio)
: 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
boronic adjective

Examples of boron in a Sentence

Recent Examples on the Web These materials include hydrogen-rich substances such as water, polyethylene, or hydrogen-rich boron nitride nanotubes. The Physics Arxiv Blog, Discover Magazine, 12 Oct. 2023 Stainless steel and boron steel are strong, long-lasting, and rust-resistant. Pamela Porter, Better Homes & Gardens, 29 Aug. 2023 Some TikTok creators who are working to debunk the borax trend are also suggesting that people may be conflating borax with boron, which is a trace element found in many foods. Julia Landwehr, Health, 3 Aug. 2023 The team solved these problems by stacking and rotating hexagonal boron nitride layers like a sandwich, with the top layer of bread rotated in relation to the bottom. Robert Lea, Popular Mechanics, 17 Jan. 2023 These include horsetail extract, gotu kola, and boron. Amber Smith, Discover Magazine, 15 Dec. 2022 Boron - Commonly found in small quantities in green, leafy vegetables, boron is an element and micronutrient. Amber Smith, Discover Magazine, 6 Oct. 2023 That’s the boron nitride in the formula, explains cosmetic chemist Ginger King. Jesa Marie Calaor, Allure, 23 Sep. 2023 Two semiconductor layers sit on top of each other, one made of silicon and phosphorus, the other of silicon and boron. Dallas News, 13 Aug. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'boron.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


borax + -on (as in carbon)

First Known Use

1812, in the meaning defined above

Time Traveler
The first known use of boron was in 1812

Dictionary Entries Near boron

Cite this Entry

“Boron.” Dictionary, Merriam-Webster, Accessed 7 Dec. 2023.

Kids Definition


bo·​ron ˈbō(ə)r-ˌän How to pronounce boron (audio)
: a metalloid element found in nature only in combination (as in borax) see element

Medical Definition


: 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
boronic adjective

More from Merriam-Webster on boron

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