pi meson

pi meson

noun Physics.

Origin:
1945–50

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Collins
World English Dictionary
pi meson
 
n
another name for pion

pion or pi meson (ˈpaɪɒn)
 
n
physics a meson having a positive or negative charge and a rest mass 273.13 times that of the electron, or no charge and a rest mass 264.14 times that of the electron
 
[C20: from Greek letter pi1 + on]
 
pi meson or pi meson
 
n
 
[C20: from Greek letter pi1 + on]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
pi meson  
See pion.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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