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Subatomic

[suhb-uh-tom-ik]

Origin

adjective Physics.

of or pertaining to a process that occurs within an atom.

noting or pertaining to a particle or particles contained in an atom, as electrons, protons, or neutrons.

Origin:
1900–05; sub- + atomic

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Subatomic is always a great word to know.

So is cycle. Does it mean:

a quantized state in which matter may exist, having constant energy and separated from others in the series by finite quantities of energy

a sequence of changing states that produces a final state identical to the original one; one of a succession of periodically recurring events

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Collins

World English Dictionary

subatomic (ˌsʌbəˈtɒmɪk)

—*adj*
1.	of, relating to, or being a particle making up an atom or a process occurring within atoms: the electron is a subatomic particle
2.	having dimensions smaller than atomic dimensions

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

subatomic

1903, from sub-atom (1880), from sub- + atom.

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

subatomic sub·a·tom·ic (sŭb'ə-tŏm'ĭk)
adj.