subatomic particle
Americannoun
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Any of various particles of matter that are smaller than a hydrogen atom. Protons, neutrons, and electrons are subatomic particles, as are all hadrons and leptons.
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See also composite particle elementary particle
Other Word Forms
Noun Inflected Forms
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.
At 2.4 x 1020eV, the energy of this single subatomic particle is equivalent to dropping a brick on your toe from waist height.
From Science Daily • Nov. 23, 2023
The largest scientific project in Antarctica, ICECUBE, attempts to quantify and trace an unfathomably small subatomic particle — the neutrino.
From Salon • May 29, 2023
Through what’s called beta-minus decay, a neutron will transform into a proton, spitting out an electron and another subatomic particle called a neutrino in the process.
From Scientific American • Jan. 9, 2023
Take the muon, a subatomic particle that became briefly famous last year.
From New York Times • Jun. 13, 2022
“Well, I know a quark is a subatomic particle, but if you ask me, it also sounds like the noise a subatomic duck might make.”
From "Shine!" by J.J. and Chris Grabenstein
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.
