Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of a group of four mesons, one positively charged and one negatively charged, having a mass 966 times that of an electron, and two electrically neutral, having a mass 974 times that of an electron. The two charged kaons have the same mean lifetime, about 1.24 × 10−10 second; the two neutral kaons have lifetimes of about 9 × 10−11 second and 5 × 10−8 second.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics any of four unstable subatomic particles, mesons, they are a combination of a strange quark or antiquark and either an up or down quark or antiquark

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an unstable meson produced as the result of a high-energy particle collision

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[ka, pronunciation of the letter K + –on.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From contracted pronunciation of K-meson

Examples

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