Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to an atom or atoms.
  • adj. Of or employing nuclear energy: an atomic submarine; atomic weapons.
  • adj. Very small; infinitesimal.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of, or relating to atoms
  • adj. Of, or employing nuclear energy or processes
  • adj. Infinitesimally small
  • adj. Unable to be split or made any smaller
  • adj. Said of an operation that is guaranteed to either complete fully, or not at all.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to atoms.
  • adj. Extremely minute; tiny.

from The Century Dictionary and Cyclopedia

  • Pertaining to atoms; consisting of atoms.
  • Extremely minute.
  • In client., existing in the condition of isolated atoms of the same kind; not united into groups to constitute molecules: as, for example, active oxygen at the instant of its separation from hydrogen dioxid.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of or relating to or comprising atoms
  • adj. (weapons) deriving destructive energy from the release of atomic energy
  • adj. immeasurably small

Etymologies

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