neutron

noun

neu·​tron ˈnü-ˌträn 

ˈnyü-

: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus

neutronic

nü-ˈträ-nik 

nyü-

adjective

Examples of neutron in a Sentence

Recent Examples on the Web

Future experiments could expose Bi-2212 and Nb3Al to low-temperature neutrons or heavy ions. — Aamir Khollam, Interesting Engineering, 5 Sep. 2026

The only way to safely examine these delicate remains is through highly sensitive techniques like neutron imaging. — Andrew Paul, Popular Science, 3 Sep. 2026

But in the near term there are more practical uses, such as cooling materials to ultra-low temperatures, medical research, and neutron detection. — Eric Berger, ArsTechnica, 26 Aug. 2026

In most atoms, the energy needed to flip a neutron in this way would require a gamma-ray laser, which scientists can’t make yet. — Jacek Krywko, Scientific American, 20 Aug. 2026

Word History

Etymology

probably from neutral

First Known Use

1921, in the meaning defined above

Phrases Containing neutron

• neutron activation analysis
• neutron bomb
• neutron star

Rhymes for neutron

• anton
• argon
• axon
• baronne
• baryon
• baton
• boron
• buisson
• bygone
• capon
• cardon
• chiffon

Kids Definition

neutron

noun

neu·​tron ˈn(y)ü-ˌträn 

: an uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus

Medical Definition

neutron

noun

neu·​tron ˈn(y)ü-ˌträn 

: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus