say it: suhb-uh-TAH-mik
subatomic is an adjective meaning "of or relating to constituents of the atom or forces within the atom". It carries 2 recorded senses.
of or relating to constituents of the atom or forces within the atom
“subatomic particles”
“harnessing subatomic energy”
of smaller than atomic dimensions
Definitions, synonyms and semantic relations for subatomic come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.