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subatomic particle

American  
[suhb-uh-tahm-ik pahr-ti-kuhl] / ˌsʌb əˈtɑm ɪk ˈpɑr tɪ kəl /

noun

plural

subatomic particles

  1. Physics. any of various basic constituents of matter that are smaller than an atom, such as a proton, electron, or gluon.

subatomic particle Scientific  
/ sŭb′ə-tŏm′ĭk /

  1. Any of various particles of matter that are smaller than a hydrogen atom. Protons, neutrons, and electrons are subatomic particles, as are all hadrons and leptons.

  2. See also composite particle elementary particle

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.