subatomic

adjective sub·atom·ic \-ə-ˈtä-mik\

: smaller than an atom

: of or relating to the inside of an atom

Full Definition of SUBATOMIC

: of or relating to the inside of the atom

: of, relating to, or being particles smaller than atoms

See subatomic defined for English-language learners

1903

Medical Dictionary

adjective sub·atom·ic \ˌsəb-ə-ˈtäm-ik\

: of or relating to the inside of the atom

: of, relating to, or being particles smaller than atoms

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