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

Using the new method, the researchers directly observed how UV radiation alters chemical bonds involving hydrogen, silicon, and boron atoms near the surface of high-efficiency silicon solar cells. —Georgina Jedikovska, Interesting Engineering, 27 Jan. 2026

Blue diamonds are among the rarest gemstones on earth, and owe their unusual and highly prized color to the presence of boron, which absorbs warmer tones. —Kate Matthams, Forbes.com, 16 Jan. 2026

Further, borates contain atoms of both boron and oxygen. —Keith Cooper, Space.com, 5 Jan. 2026

Borosilicate glass is made of boron oxide and silica. —Kait Hanson, Southern Living, 24 Dec. 2025

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