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

The new lineup of vitamins and minerals includes molybdenum, boron, and choline. —Alaina Chou, Bon Appetit Magazine, 29 Aug. 2025

The Hy-Bor material, a mix of high-end carbon fibers and boron fibers from American company Specialty Materials, makes its tennis debut for Head. —Tim Newcomb, Forbes.com, 21 Aug. 2025

At its core is bilayer graphene, sandwiched between layers of hexagonal boron nitride. —Aamir Khollam, Interesting Engineering, 7 Aug. 2025

Plants are particularly sensitive to boron and salts, found in high concentrations in many laundry detergents and water softeners. —Erica Browne Grivas, Better Homes & Gardens, 16 July 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