antimatter

American  

[an-tee-mat-er, an-tahy-] / ˈæn tiˌmæt ər, ˈæn taɪ- /

noun

Physics.

1. matter composed only of antiparticles, especially antiprotons, antineutrons, and positrons.

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antimatter British  

/ ˈæntɪˌmætə /

noun

1. a form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons

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antimatter Scientific  

/ ăn′tĭ-măt′ər /

1. A form of matter that consists of antiparticles.

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antimatter Cultural  

1. In physics, matter made of antiparticles.

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Etymology

Origin of antimatter

First recorded in 1950–55; anti- + matter

Example Sentences

By combining their results, researchers can better study neutrinos and their antimatter counterparts, offering insight into why the universe did not self destruct immediately after the Big Bang.

From Science Daily

The project is designed to look for an extremely rare event in which muonium, a short lived system made of a positive muon bound to an electron, spontaneously transforms into antimuonium, its antimatter counterpart.

From Science Daily

The same process also explains how antideuterons, made of antimatter, are produced.

From Science Daily

These very massive, elusive particles then decayed into lighter, more stable particles with a slight preference for matter over antimatter.

From Science Daily

Such simulations could shed light on major open questions in physics, including the imbalance of matter and antimatter, the creation of heavy elements inside supernovae, and the behavior of matter at ultra-high densities.

From Science Daily