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elementary particle

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elementary particle

–noun Physics.
any lepton, hadron, photon, or graviton, the particles once thought to be the indivisible components of all matter or radiation.


Origin:
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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elementary particle  
n.  Any of the subatomic particles that compose matter and energy, especially one hypothesized or regarded as an irreducible constituent of matter. Also called fundamental particle. See Table at subatomic particle.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: elementary particle
Function: noun
1 : any of the particles of which matter and energy are composed or which mediate the fundamental forces of nature;especially : one (as the photon or the electron) whose existence has not been attributed to the combination of other more fundamental entities
2 : one of thestructural units of mitochondrial cristae that are observable by the electron microscope usually as spheres or stalked spheres and are prob. the seat of fundamental energy-producing reactions
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

elementary particle n.

  1. A knoblike body that appears on the luminal surfaces of mitochondrial cristae and is believed to be involved with the electron transport system.

  2. Any of the subatomic particles that compose matter and energy, especially one hypothesized or regarded as an irreducible constituent of matter. Also called fundamental particle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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