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

Meanwhile, some atoms of uranium-238 can absorb neutrons and become plutonium and other transuranic elements. —David Szondy, New Atlas, 28 Dec. 2024

They are made of fundamental particles, like the proton, neutron and electron. —Paul Sutter, Space.com, 24 Dec. 2024

However, the key challenge lies in effectively harnessing the fast-moving neutrons produced by the reaction to convert their energy into usable heat. —Benedict Cosgrove, Newsweek, 19 Dec. 2024

Another breed of hypothetical particle, axions are predicted to exist by quantum chromodynamics, which is our best quantum theory of the strong force that binds quarks together to form protons, neutrons and ultimately atomic nuclei. —Keith Cooper, Space.com, 19 Dec. 2024

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

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