antimatter

noun

an·​ti·​mat·​ter
ˈan-tē-ˌma-tər,
ˈan-ˌtī- How to pronounce antimatter (audio)
: matter composed of antiparticles

Examples of antimatter in a Sentence

Recent Examples on the Web That there was enough leftover matter after this great annihilation to form galaxies, stars, planets and even us but almost no antimatter is known as the matter-antimatter imbalance. Luke Caldwell, Scientific American, 1 Feb. 2024 Hard Science Physicists probe why the Universe exists and has matter A new study rocks prevailing theories on antimatter in the early Universe. Big Think, 24 June 2024 As a result of this process, known as beta decay, the nucleus also emits an electron or its antimatter partner, the positron. Paul Sutter, Ars Technica, 11 June 2024 Some of them seek to offer matter the upper hand by introducing new particles that decay, producing more matter than antimatter in the process, or that interact differently with matter and antimatter. Luke Caldwell, Scientific American, 1 Feb. 2024 See all Example Sentences for antimatter 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'antimatter.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of antimatter was in 1934

Dictionary Entries Near antimatter

Cite this Entry

“Antimatter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antimatter. Accessed 26 Jul. 2024.

Kids Definition

antimatter

noun
an·​ti·​mat·​ter ˈant-i-ˌmat-ər How to pronounce antimatter (audio)
: matter whose parts match parts of ordinary matter except in having some opposite properties (as a positive instead of a negative charge)

More from Merriam-Webster on antimatter

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