English dictionary, thesaurus, translations & etymology
FreeDict.com
noun Uncommon

neutron

NOO-tron

Neutron (noun) means a subatomic particle with no electric charge found in the nucleus of an atom. Example: “Splitting an atom releases a burst of neutrons.”

noun
1
A subatomic particle with no electric charge found in the nucleus of an atom.
"Splitting an atom releases a burst of neutrons."
"A neutron and a proton together make up most of an atom's mass."

How to use neutron

Learner’s notes

In plain EnglishA chargeless particle found in the nucleus of atoms, alongside protons.

Easily confused with
Common pairings
neutron star free neutron

Word forms

neutrons plural

Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “neutron” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

Splitting an atom releases a burst of _____.

Etymology

From neutral plus the particle-naming suffix -on. Coined in 1899, though the modern meaning was firmly established by Ernest Rutherford in 1920.

· First attested 1899

Class of 1899 neutron joined the language around 1899.
See the full Class of 1899 →

Frequently asked questions

What does “neutron” mean?

The word “neutron” means a subatomic particle with no electric charge found in the nucleus of an atom. In plain terms, a chargeless particle found in the nucleus of atoms, alongside protons.

How do you pronounce “neutron”?

“Neutron” is pronounced NOO-tron (/ˈnu.tɹɑn/ in IPA).

How do you use “neutron” in a sentence?

Here is “neutron” used in a sentence: “Splitting an atom releases a burst of neutrons.”

What part of speech is “neutron”?

“Neutron” is a noun.

Where does the word “neutron” come from?

The word “neutron” dates back to around 1899. From neutral plus the particle-naming suffix -on. Coined in 1899, though the modern meaning was firmly established by Ernest Rutherford in 1920.

Is “neutron” a common word?

“Neutron” is an uncommon word in modern English.

Featured in

Definitions: FreeDict original editorial