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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When packed together, fermions cannot be compressed past a certain point. Shalma Wegsman, Wired News, 25 May 2025 The group worked out a new set of rules (opens a new tab) for curves that can accommodate certain toy fermions. Charlie Wood, Quanta Magazine, 25 Sep. 2024 That one harnesses Majorana fermions to create topological qubits that are designed to store information in a way that’s inherently protected against many types of errors. New Atlas, 28 Feb. 2025 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 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 2 Jun. 2025.

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