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

Fermenting rice water for nine days increases its levels of potassium, calcium, magnesium, copper, and boron by up to 204%, according to one study.2 The microbial population reached its peak at three days of fermentation. —Leanne Potts, Better Homes & Gardens, 26 June 2025

Maintaining and even improving bone health requires a diet with sufficient calcium, protein, vitamins C, D3 and K2, and trace minerals such as magnesium, boron, copper, manganese, potassium, phosphorous, nickel, vanadium, zinc, silicon, selenium and strontium. —Jia H. Jung, Mercury News, 4 June 2025

Even elements like tungsten and boron are making their presence felt and playing crucial roles in advancing fusion energy. —Sahit Muja, Forbes.com, 16 Apr. 2025

Plant nutrients that are needed in much lower quantities are boron, calcium, chlorine, copper, iron, magnesium, manganese, molybdenum, sulfur and zinc. —Rita Perwich, San Diego Union-Tribune, 1 Mar. 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