grav·​i·​ton | \ ˈgra-və-ˌtän How to pronounce graviton (audio) \

Definition of graviton

: a hypothetical particle with zero charge and rest mass that is held to be the quantum of the gravitational field

Examples of graviton in a Sentence

Recent Examples on the Web As a 2006 study demonstrated, a Jupiter-mass planet in tight orbit around a neutron star would interact with approximately one graviton per decade, which is collisionless enough to fit the bill to describe dark matter. Ethan Siegel, Forbes, 9 Apr. 2021 In the 1930s, Wolfgang Pauli and Markus Fierz proposed a graviton with mass. Quanta Magazine, 18 Aug. 2020 Two groups of scientists may have finally solved that problem, by proposing an experiment to determine if the graviton exists without ever observing it directly. Avery Thompson, Popular Mechanics, 8 Mar. 2018 The elusive graviton has been the subject of debate in theoretical physics for almost 100 years. Caroline Delbert, Popular Mechanics, 27 Jan. 2020 On the plus side, researchers realized that a certain vibration mode of the string fit the profile of a graviton, the coveted quantum purveyor of gravity. Quanta Magazine, 18 Feb. 2015 During this trillionth of a trillionth of a trillionth of a second, quantum mechanical fluctuations in space-time generated gravitons, gravitational ripples in space-time. Peter Byrne, Quanta Magazine, 3 July 2014 And on that stormy night in Aspen in 1984, Green and Schwarz discovered that the graviton contributed a term to the equations that, for a particular version of string theory, exactly canceled out the problematic anomaly. Quanta Magazine, 18 Feb. 2015 That inclusion would imply that the graviton has a supersymmetric partner called the gravitino, which the theory predicts to (uniquely) have a spin of 3/2. Philip Ball, Scientific American, 6 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'graviton.' 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 graviton

1942, in the meaning defined above

History and Etymology for graviton

International Scientific Vocabulary gravity + -on entry 2

Learn More About graviton

Time Traveler for graviton

Time Traveler

The first known use of graviton was in 1942

See more words from the same year

Dictionary Entries Near graviton




See More Nearby Entries 

Statistics for graviton

Cite this Entry

“Graviton.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2021.

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

More from Merriam-Webster on graviton Encyclopedia article about graviton


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Love words? Need even more definitions?

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