Dictionary

J/psi particle

J/psi particle

noun \ˌjā-ˈsī-, -ˈpsī-\

Definition of J/PSI PARTICLE

:  an unstable neutral fundamental particle of the meson group that has a mass about 6000 times the mass of an electron —called also J particle, J/psi, psi particle

First Known Use of J/PSI PARTICLE

1977

Browse

Next Word in the Dictionary: JPPPrevious Word in the Dictionary: JpnAll Words Near: J/psi particle
March 01, 2015
macaroni Hear it
Tube-shaped pasta or a fop or dandy
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears