Dictionary.com
Thesaurus.com

nucleon

American  
[noo-klee-on, nyoo-] / ˈnu kliˌɒn, ˈnju- /

noun

Physics.
  1. a proton or neutron, especially when considered as a component of a nucleus.


nucleon British  
/ ˈnjuːklɪˌɒn /

noun

  1. a proton or neutron, esp one present in an atomic nucleus

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

nucleon Scientific  
/ no̅o̅klē-ŏn′ /
  1. A proton or a neutron, especially as part of an atomic nucleus.


Other Word Forms

Etymology

Origin of nucleon

First recorded in 1935–40; nucle(us) + -on 1

Vocabulary lists containing nucleon

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Models that include only traditional two nucleon interactions fail to produce the observed structure.

From Science Daily Mar. 8, 2026

The high-speed motion of orbiting sensors increases the coupling between axion halos and nucleon spins, producing a tenfold sensitivity improvement compared with Earth-based dark matter searches.

From Science Daily Dec. 6, 2025

The electrons in that beam slammed into the target's protons, exciting its internal quarks until the proton began to ring like a bell with nucleon resonance.

From Salon Sep. 1, 2023

The team's research, published this month in the journal Physical Review Letters, has finally shed the first light on how these nucleon resonances work at their core.

From Salon Sep. 1, 2023

The larger nucleus has a greater binding energy and less mass per nucleon than the two that combined.

From Textbooks Aug. 12, 2015

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training