atomic

Adjective
  1. Of or relating to or comprising atoms (synset 302895923)
    "atomic structure"; "atomic hydrogen"
  2. (weapons) deriving destructive energy from the release of atomic energy (synset 300612923)
    "nuclear war"; "nuclear weapons"; "atomic bombs"
    similar to: thermonuclear - using nuclear weapons based on fusion as distinguished from fission
    same as: nuclear
  3. Immeasurably small (synset 301395023)
    similar to: little, small - limited or below average in number or quantity or magnitude or extent

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