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 In the 1930s, Wolfgang Pauli and Markus Fierz proposed a graviton with mass. Quanta Magazine, "The Physicist Who Slayed Gravity’s Ghosts," 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, "Scientists Propose Experiment to Test Quantum Gravity," 8 Mar. 2018 The elusive graviton has been the subject of debate in theoretical physics for almost 100 years. Caroline Delbert, Popular Mechanics, "Did Scientists Finally Solve the Impossible Physics Riddle?," 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, "In Fake Universes, Evidence for String Theory," 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, "A Bold Critic of the Big Bang’s ‘Smoking Gun’," 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, "In Fake Universes, Evidence for String Theory," 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, "Supergravity Snags Super Award: $3-Million Special Breakthrough Prize," 6 Aug. 2019 For gravity, a particle called the graviton does the job. Lorenzo Bianchi, Newsweek, "Was This Stephen Hawking's Theory of Everything?," 19 Mar. 2018

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.

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First Known Use of graviton

1942, in the meaning defined above

History and Etymology for graviton

International Scientific Vocabulary gravity + -on entry 2

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Time Traveler for graviton

Time Traveler

The first known use of graviton was in 1942

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Statistics for graviton

Cite this Entry

“Graviton.” Dictionary, Merriam-Webster, Accessed 26 Nov. 2020.

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