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psi particle

American  
[sahy, psahy] / saɪ, psaɪ /

noun

Physics.

  1. any of a family of mesons consisting of a charmed quark and a charmed antiquark.

  2. an early name for the J/psi particle.

psi particle British  

noun

  1. See J/psi particle

"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
psi particle Scientific  
/ sī,psī /

  1. See J/psi particle

Etymology

Origin of psi particle

First recorded in 1970–75

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Since the simultaneous findings by Richter and Ting, at least seven more members of the J, or psi, particle family have been discovered, further strengthening the quark theory.

From Time Magazine Archive

In 1974 he found and named the psi particle, which gave physicists conclusive evidence that quarks really exist.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.