atomatic atomic atomiferous atomistic corpuscular cyclic diatomic dibasic embryonic evanescent germinal granular heteroatomic heterocyclic hexatomic homocyclic impalpable imperceptible imponderable inappreciable indiscernible infinitesimal intangible invisible isobaric isocyclic isoteric isotopic microcosmic microscopic molecular monatomic pentatomic tenuous tetratomic thin triatomic tribasic ultramicroscopic unseeable