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adjective, Physics.
of or relating to a process that occurs within an atom.
noting or pertaining to a particle or particles contained in an atom, as electrons, protons, or neutrons.
of, relating to, or being a particle making up an atom or a process occurring within atoms: the electron is a subatomic particle
having dimensions smaller than atomic dimensions

subatomic sub·a·tom·ic (sŭb’ə-tŏm’ĭk)

Of or relating to the constituents of the atom.

Having dimensions or participating in reactions characteristic of the constituents of the atom.

subatomic definition

A descriptive term for objects and events within the atom.


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