fermion

noun

fer·​mi·​on ˈfer-mē-ˌän How to pronounce fermion (audio)
ˈfər-
: a particle (such as an electron, proton, or neutron) whose spin quantum number is an odd multiple of ¹/₂ compare boson
fermionic adjective

Examples of fermion in a Sentence

Recent Examples on the Web
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Back in 1937, Italian physicist Ettore Majorana described a subatomic particle named a Majorana fermion with a unique quantum mechanical state that's resistant to local disturbances. New Atlas, 20 Feb. 2025 Known as semi-Dirac fermions, particles with this bizarre behavior were first predicted 16 years ago. Michael Irving, New Atlas, 11 Dec. 2024 The group worked out a new set of rules for curves that can accommodate certain toy fermions. Charlie Wood, WIRED, 3 Nov. 2024 But many of the matter particles that make up our world, such as electrons, are fermions, which have half-integer amounts of spin. Charlie Wood, WIRED, 3 Nov. 2024 See All Example Sentences for fermion

Word History

Etymology

Enrico Fermi + English -on entry 2

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of fermion was in 1947

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Cite this Entry

“Fermion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fermion. Accessed 3 Mar. 2025.

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