atomic atomic /əˈtɑːmɪk/

adjective

1. () Of or relating to or comprising atoms  ( atomic )
   of or relating to or comprising atoms
    Atomic structure
   atomic structure
    Atomic hydrogen
   atomic hydrogen
   
2. () (weapons) deriving destructive energy from the release of atomic energy  ( atomic , nuclear )
   (weapons) deriving destructive energy from the release of atomic energy
    Nuclear war
   nuclear war
    Nuclear weapons
   nuclear weapons
    Atomic bombs
   atomic bombs
   
3. Immeasurably small  ( atomic )
   immeasurably small