/ Dictionary / Index A atomics: Meaning and Definition of Find definitions for: a•tom•ics Pronunciation: (u-tom'iks), [key] — n. (used with a sing. v.) Informal. the branch of physics that deals with atoms, esp. atomic energy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. atomic reactor atomic structure Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language