atomic

/əˈtɑmɪk/
adjective
  1. Relating to atoms, the tiny particles that make up all matter.
    • An atomic model shows electrons orbiting a nucleus.
    • Scientists study atomic structure to understand how elements behave.
    • The atomic weight of carbon is about 12.
  2. Relating to energy or weapons that come from splitting or joining atoms.
    • Atomic power plants generate electricity without burning fossil fuels.
    • Many people feared an atomic war during the Cold War.
    • The country signed a treaty to limit atomic weapons.
  3. Extremely small; tiny.
    • The difference in their scores was atomic, almost impossible to measure.
    • The changes were atomic, but they added up over time.
    • He noticed an atomic speck of dust on the lens.
Synonyms
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