boron

noun

bo·​ron ˈbȯr-ˌän 

: 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

bȯr-ˈä-nik 

adjective

Examples of boron in a Sentence

Recent Examples on the Web

Then there are micronutrients like zinc, boron, molybdenum and others. —Edward Lotterman, Twin Cities, 15 Mar. 2026

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, 13 Mar. 2026

The company on Thursday announced its selection of a 120-acre site in Northlake 10 miles from its existing Fort Worth facility to manufacture neodymium-iron-boron (NdFeB) magnets, a critical component for semiconductor manufacturing. —Sasha Richie, Dallas Morning News, 26 Feb. 2026

Research also suggests that boron plays a role in osteogenesis, or the formation of new bone material. —Lauren Manaker, SELF, 6 Feb. 2026

Word History

Etymology

borax + -on (as in carbon)

First Known Use

1812, in the meaning defined above

Phrases Containing boron

• boron carbide

Rhymes for boron

• anton
• argon
• axon
• baronne
• baryon
• baton
• buisson
• bygone
• capon
• cardon
• chiffon
• coupon

Kids 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

boronic

bȯr-ˈän-ik, bōr- 

adjective