psi particle

noun

ˈsī- How to pronounce psi particle (audio)
ˈpsī-
: j/psi particle

Word History

First Known Use

1974, in the meaning defined above

Time Traveler
The first known use of psi particle was in 1974

Dictionary Entries Near psi particle

Psilotum

psi particle

psi phenomena

See More Nearby Entries 

Cite this Entry

“Psi particle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psi%20particle. Accessed 23 Feb. 2025.

Copy Citation

Share

Love words? Need even more definitions?

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

Popular in Grammar & Usage

See All

Democracy or Republic: What's the difference?

Why is '-ed' sometimes pronounced at the end of a word?

What's the difference between 'fascism' and 'socialism'?

More Commonly Misspelled Words

Words You Always Have to Look Up
See All

Popular in Wordplay

See All

More Words with Remarkable Origins

Terroir, Oenophile, & Magnum: Ten Words About Wine

8 Words for Lesser-Known Musical Instruments

9 Superb Owl Words

15 Words That Used to Mean Something Different
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
boy-thinking-light-bulb
Quiz: Are You An Idiom Savant? Figure out what these figures of speech actually ...