noun
boron
BOR-on
Boron (noun) means a chemical element with the symbol B and atomic number 5, classed as a metalloid. Example: “Boron has the chemical symbol B.”
noun
1
A chemical element with the symbol B and atomic number 5, classed as a metalloid.
"Boron has the chemical symbol B."
"The periodic table lists boron with an atomic number of 5."
"In its pure form, boron can appear as a dark powder."
How to use boron
Learner’s notesIn plain EnglishBoron is the chemical element with the symbol B.
When to use it
It is a technical term used mainly in chemistry and science writing.
Memory tip
Boron is usually uncountable, so you normally say boron rather than a boron.
Trace the full origin ↓
Easily confused with
borax
Common pairings
boron atom
the element boron
pure boron
Vocabulary Flow
Build your vocabulary from words like boron.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice
Fill the gap
Can you complete this real example?
_____ has the chemical symbol B.
Etymology
The word was coined by the British chemist Humphry Davy, who altered his earlier term boracium. It combines the stem of borax with an ending modelled on carbon.
Synonyms
View more →
B
Related words
Rhymes for boron
See all rhymes for boron →Frequently asked questions
What is boron?
Boron is a chemical element with the symbol B and atomic number 5. It is classed as a metalloid.
What does boron look like in its pure form?
In its pure form, boron is described as a dark amorphous powder.
Who came up with the name boron?
The British chemist Humphry Davy coined it, changing his earlier word boracium. The name draws on borax and on the ending of carbon.
What is the meaning of boron?
"boron" (noun) means a chemical element with the symbol B and atomic number 5, classed as a metalloid.
