subatomic particle
n.
Any of various units of matter below the size of an atom, including the elementary particles and hadrons.
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Nearby words
subastral, subastringent, subatmospheric, subatom, subatomic, subatomic particle, subatomic particles, subaudition, subauricular, subaxial, subaxillary
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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.