subatomic

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌsʌbəˈtɒmɪk/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˌsʌbəˈtɑmɪk/ ,USA pronunciation: respelling(sub′ə tom′ik)


WordReference Random House Learner's Dictionary of American English © 2026
sub•a•tom•ic /ˌsʌbəˈtɑmɪk/USA pronunciation   adj. 
  1. Physicsof or relating to a process that occurs within an atom.
  2. Physicsof or relating to particles contained in an atom, as electrons, protons, or neutrons.

WordReference Random House Unabridged Dictionary of American English © 2026
sub•a•tom•ic  (sub′ə tom′ik),USA pronunciation adj. [Physics.]
  1. Physicsof or pertaining to a process that occurs within an atom.
  2. Physicsnoting or pertaining to a particle or particles contained in an atom, as electrons, protons, or neutrons.
  • sub- + atomic 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::
subatomic /ˌsʌbəˈtɒmɪk/ adj
  1. of, relating to, or being a particle making up an atom or a process occurring within atoms
  2. having dimensions smaller than atomic dimensions
'subatomic' also found in these entries (note: many are not synonyms or translations):
accelerator - Bothe - pentaquark - quantum teleportation - Richter - -tron - atomic mass unit - corpuscular radiation - de Broglie wave - magneton - on

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