: 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
Examples of boron in a Sentence
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By comparing two types of borosilicate glass, one containing magnesium and one without, the team discovered that the diffusion of boron atoms depends strongly on the glass composition and the time it has been exposed to water.
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Prabhat Ranjan Mishra, Interesting Engineering, 16 Oct. 2025
The analyst added that these permanent magnets use elements such as samarium-cobalt and neodymium-iron-boron molecules or yttrium, a rare earth metal used to prevent corrosion.
—Lisa Kailai Han, CNBC, 13 Oct. 2025
Enhance Soil Fertility Rely on the soil sample analysis to determine the levels of phosphorus, potassium, calcium, magnesium, zinc, manganese, and boron in your soil.
—Mary Marlowe Leverette, Southern Living, 10 Sep. 2025
One side of the drums is coated with beryllium, the other with boron.
—David Szondy
september 10, New Atlas, 10 Sep. 2025
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Prabhat Ranjan Mishra, Interesting Engineering, 16 Oct. 2025
The analyst added that these permanent magnets use elements such as samarium-cobalt and neodymium-iron-boron molecules or yttrium, a rare earth metal used to prevent corrosion.
—Lisa Kailai Han, CNBC, 13 Oct. 2025
Enhance Soil Fertility Rely on the soil sample analysis to determine the levels of phosphorus, potassium, calcium, magnesium, zinc, manganese, and boron in your soil.
—Mary Marlowe Leverette, Southern Living, 10 Sep. 2025
One side of the drums is coated with beryllium, the other with boron.
—David Szondy
september 10, New Atlas, 10 Sep. 2025
See All Example Sentences for boron
Cite this Entry
“Boron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boron. Accessed 30 Oct. 2025.
Copy CitationKids Definition
boron
noun
bo·ron
ˈbō(ə)r-ˌän 
ˈbȯ(ə)r-
: a metalloid element found in nature only in combination (as in borax) see element
Medical Definition
boron
noun
bo·ron
ˈbō(ə)r-ˌän, ˈbȯ(ə)r-
: 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
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