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pionic
Variant of pion
noun
Particle Physics any of three short-lived mesons that may be positive, negative, or neutral: pions have a mass c. 270 times that of an electron and play an important role in the binding forces within the nucleus of an atom
Related Forms:
- pionic adjective
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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