fermion

noun
fer·​mi·​on | \ ˈfer-mē-ˌän How to pronounce fermion (audio) , ˈfər- \

Definition of fermion

: a particle (such as an electron, proton, or neutron) whose spin quantum number is an odd multiple of ¹/₂ — compare boson

Other Words from fermion

fermionic \ ˌfer-​mē-​ˈä-​nik How to pronounce fermion (audio) , ˌfər-​ \ adjective

Examples of fermion in a Sentence

Recent Examples on the Web Pauli postulated that fermion particles like protons, electrons, and neutrons with the same quantum state could not exist in the same space. Joshua Hawkins, BGR, 24 Nov. 2021 Very intelligent aliens can achieve quantum computation by exciting the various energy and spin states in this fermion-gravitonic superfluid. Stephon Alexander, Wired, 31 Aug. 2021 Microsoft is taking yet another tack, trying to twist elusive subatomic particles called Majorana fermions into a braided shape that would keep qubits in a quantum state longer. Washington Post, 26 Oct. 2019 The distant competitors include asymptotically safe gravity, E8 theory, noncommutative geometry and causal fermion systems. Quanta Magazine, 18 Dec. 2017 In the early 1970s several researchers independently proposed that bosons and fermions might be related to one another via a fundamental symmetry called supersymmetry. Philip Ball, Scientific American, 6 Aug. 2019 Every species of quarticle is either a boson or fermion. Quanta Magazine, 28 Feb. 2017 Any two fermions that are within touching distance of each other must be different. Chris Lee, Ars Technica, 28 Nov. 2018 The quasiparticles produced here, called Majorana fermions, are their own antimatter. Shannon Palus, Discover Magazine, 22 Dec. 2016

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

See More

First Known Use of fermion

1947, in the meaning defined above

History and Etymology for fermion

Enrico Fermi + English -on entry 2

Learn More About fermion

Time Traveler for fermion

Time Traveler

The first known use of fermion was in 1947

See more words from the same year

Dictionary Entries Near fermion

Fermi level

fermion

Fermi surface

See More Nearby Entries 

Statistics for fermion

Last Updated

8 Dec 2021

Cite this Entry

“Fermion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fermion. Accessed 27 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on fermion

Britannica.com: Encyclopedia article about fermion

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!