subatomic

adjective

sub·​atom·​ic ˌsəb-ə-ˈtä-mik How to pronounce subatomic (audio)
1
: of or relating to the inside of the atom
2
: of, relating to, or being particles smaller than atoms

Examples of subatomic in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In particle physics, decay refers to the process where unstable subatomic particles transform into two or more lighter, more stable particles. William Barter, Space.com, 1 Aug. 2025 Quantum Computing’s Emerging Capabilities and Threats Quantum computing works by harnessing the distinctive properties of atoms and subatomic particles. Chuck Brooks, Forbes.com, 1 Aug. 2025 Neutrinos are virtually massless subatomic particles with no charge. Jay Kakade july 20, New Atlas, 20 July 2025 The use of subatomic particles to process data could represent a breakthrough that’s unmatched in modern human history, according to analysts at Bank of America, who compared it to the discovery of fire. Preston Fore, Fortune, 19 July 2025 See All Example Sentences for subatomic

Word History

First Known Use

1874, in the meaning defined at sense 1

Time Traveler
The first known use of subatomic was in 1874

Browse Nearby Words

Cite this Entry

“Subatomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subatomic. Accessed 19 Aug. 2025.

Medical Definition

subatomic

adjective
sub·​atom·​ic ˌsəb-ə-ˈtäm-ik How to pronounce subatomic (audio)
1
: of or relating to the inside of the atom
2
: of, relating to, or being particles smaller than atoms
Last Updated: - Updated example sentences
Love words? Need even more definitions?

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