say it: uh-TAH-mik
atomic is an adjective meaning "of or relating to or comprising atoms". It carries 3 recorded senses.
of or relating to or comprising atoms
“atomic structure”
“atomic hydrogen”
(weapons) deriving destructive energy from the release of atomic energy
“nuclear war”
“nuclear weapons”
“atomic bombs”
immeasurably small
Definitions, synonyms and semantic relations for atomic 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.