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
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Chinese scientists have made a major step in the hunt for elusive subatomic particles called neutrinos. Mrigakshi Dixit, Interesting Engineering, 17 Oct. 2025 Quantum mechanics was originally formulated to explain and predict the perplexing behaviors of atoms, molecules and subatomic particles. Zhixin Wang, The Conversation, 10 Oct. 2025 During this period, Reines and a Los Alamos co-worker, Clyde Cowan, started to work on detecting neutrinos, a subatomic particle that had been theorized in the 1930s but, in the mid-1950s, had not been proven to exist. Andre Mouchard, Oc Register, 10 Oct. 2025 The trio won the physics prize for their research on the weird world of subatomic quantum tunneling that advances the power of everyday digital communications and computing. Jessica Coacci, Fortune, 8 Oct. 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

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Cite this Entry

“Subatomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subatomic. Accessed 20 Oct. 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
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