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subatomic in WordNet English dictionary
adjective- of or relating to constituents of the atom or forces within the atom
"subatomic particles"; "harnessing subatomic energy"
subatomic
- of smaller than atomic dimensions
subatomic
WordNet Lexical Database v3.0, © 2006 Princeton University
subatomic in English Wiktionary
- (adjective) (physics) Relating to particles that are constituents of the atom, or are smaller than an atom; such as proton, neutron, electron, etc.
- (adjective) Relating to any length or mass that is smaller in scale than a the diameter of a hydrogen atom.
Wiktionary, GNU Free Documentation Licence