J/psi particle

noun
\ ˌjā-ˈsī- How to pronounce J/psi particle (audio) , -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, in the meaning defined above

Keep scrolling for more

Learn More about J/psi particle

Time Traveler for J/psi particle

Time Traveler

The first known use of J/psi particle was in 1977

See more words from the same year

Dictionary Entries near J/psi particle

JPEG

Jpn

JPP

J/psi particle

Jr

JSC

JSD

See More Nearby Entries 

Statistics for J/psi particle

Cite this Entry

“J/psi particle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/J%2Fpsi%20particle. Accessed 18 Jan. 2021.

Comments on J/psi particle

What made you want to look up J/psi particle? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!