DEFINITIONS

subatomic particle

SEE SYNONYMS FOR subatomic particle ON THESAURUS.COM

n.

Any of various units of matter below the size of an atom, including the elementary particles and hadrons.

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Words nearby subatomic particle

subastral, subastringent, subatmospheric, subatom, subatomic, subatomic particle, subatomic particles, subaudition, subauricular, subaxial, subaxillary
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Science definitions for subatomic particle

subatomic particle
[ sŭb′ə-tŏm′ĭk ]

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. See also composite particle elementary particle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.