nucleon

noun
nu·​cle·​on | \ ˈnü-klē-ˌän How to pronounce nucleon (audio) , ˈnyü- \

Definition of nucleon

1 : a proton or neutron especially in the atomic nucleus
2 : a hypothetical single entity with one-half unit of isospin that can manifest itself as either a proton or a neutron

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Other Words from nucleon

nucleonic \ ˌnü-​klē-​ˈä-​nik How to pronounce nucleon (audio) , ˌnyü-​ \ adjective

Examples of nucleon in a Sentence

Recent Examples on the Web Her model explained why certain numbers of nucleons make for stable atomic configurations. Courtney Linder, Popular Mechanics, 25 Feb. 2020 Her model explained why certain numbers of nucleons make for stable atomic configurations. Courtney Linder, Popular Mechanics, 25 Feb. 2020 Her model explained why certain numbers of nucleons make for stable atomic configurations. Courtney Linder, Popular Mechanics, 25 Feb. 2020 Her model explained why certain numbers of nucleons make for stable atomic configurations. Courtney Linder, Popular Mechanics, 25 Feb. 2020 The isotope is created by a nuclear reaction, and the research team believes the nucleus wobbles because of one extra nucleon. Caroline Delbert, Popular Mechanics, 12 Feb. 2020 Plenty of nuclei have odd numbers of nucleons overall, but this gold isotope is a rare one because of the wobbling. Caroline Delbert, Popular Mechanics, 12 Feb. 2020 Oxygen atoms, for example, have eight protons, but may have eight or ten neutrons, for a total of 16 or 18 nucleons. The Economist, 1 Aug. 2019 Atomic nuclei are made of protons and neutrons, known collectively as nucleons. The Economist, 1 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nucleon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of nucleon

1923, in the meaning defined at sense 1

History and Etymology for nucleon

International Scientific Vocabulary

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Time Traveler for nucleon

Time Traveler

The first known use of nucleon was in 1923

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Dictionary Entries Near nucleon

nucleometer

nucleon

nucleonics

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Statistics for nucleon

Cite this Entry

“Nucleon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nucleon. Accessed 26 Sep. 2021.

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More Definitions for nucleon

nucleon

noun
nu·​cle·​on | \ ˈn(y)ü-klē-ˌän How to pronounce nucleon (audio) \

Medical Definition of nucleon

: a nuclear particle:
a : proton
b : neutron

Other Words from nucleon

nucleonic \ ˌn(y)ü-​klē-​ˈän-​ik How to pronounce nucleon (audio) \ adjective

More from Merriam-Webster on nucleon

Britannica.com: Encyclopedia article about nucleon

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