K meson

noun Physics.

Also K-me·son [key-mee-zon, -son, -mez-on, -mes-on] /ˈkeɪˈmi zɒn, -sɒn, -ˈmɛz ɒn, -ˈmɛs ɒn/.

Origin of K meson

First recorded in 1950–55

Definition for k meson (2 of 2)

[ key-on ]
/ ˈkeɪ ɒn /

noun Physics.

a meson with strangeness +1 and either positive or zero electric charge, or its antiparticle, with strangeness −1 and either negative or zero electric charge. Symbol: K

Origin of kaon

1955–60; ka- (spelling of name of letter k) + (mes)on
Also called K meson, K-meson.


ka·on·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for k meson

/ (ˈkeɪɒn) /


a meson that has a positive or negative charge and a rest mass of about 966 electron masses, or no charge and a rest mass of 974 electron massesAlso called: K-meson

Word Origin for kaon

C20: ka representing the letter k + (mes) on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for k meson

[ kāŏn′ ]

Any of three unstable mesons, one having charge +1 and a mass of 966 electron masses, and two being electrically neutral, with a mass 974 electron masses. Their half-life is approximately 10-8 seconds, and they decay through the weak force. Their decay patterns suggest that CP invariance may be violated. Also called K-meson K particle See Table at subatomic particle.
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