atomic

[ uh-tom-ik ]
/ əˈtɒm ɪk /

adjective

of, pertaining to, resulting from, or using atoms, atomic energy, or atomic bombs: an atomic explosion.
propelled or driven by atomic energy: an atomic submarine.
Chemistry. existing as free, uncombined atoms.
extremely minute.

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decorum
Also a·tom·i·cal.

Origin of atomic

First recorded in 1670–80; atom + -ic

OTHER WORDS FROM atomic

a·tom·i·cal·ly, adverbnon·a·tom·ic, adjectivenon·a·tom·i·cal, adjectivenon·a·tom·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for nonatomic

atomic
/ (əˈtɒmɪk) /

adjective

of, using, or characterized by atomic bombs or atomic energyatomic warfare
of, related to, or comprising atomsatomic hydrogen
extremely small; minute
logic (of a sentence, formula, etc) having no internal structure at the appropriate level of analysis. In predicate calculus, Fa is an atomic sentence and Fx an atomic predicate

Derived forms of atomic

atomically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for nonatomic

atomic
[ ə-tŏmĭk ]

Relating to an atom or to atoms.
Employing nuclear energy.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.