subatomic Synonyms

atomiferous speck small sliver piece pentatomic monatomic molecular minute minor splinter spot tetratomic barely perceptible atomatic almost negligible all but nonexistent close to zero ultramicroscopic hadronic tribasic triatomic microscopic little isobaric embryonic diminutive dibasic diatomic cyclical cyclic corpuscular bit atomistic evanescent fleck fragment invisible intangible insignificant infinitesimal inconsiderable inappreciable imperceptible impalpable hexatomic atomic