of or relating 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 of subatomic
First recorded in 1900–05; sub-
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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British Dictionary definitions for subatomic
of, relating to, or being a particle making up an atom or a process occurring within atomsthe electron is a subatomic particle
having dimensions smaller than atomic dimensions
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
Word Origin and History for subatomic
1903, from sub-atom (1880), from sub- + atomic.
Online Etymology Dictionary, © 2010 Douglas Harper
Of or relating to the constituents of the atom.
Having dimensions or participating in reactions characteristic of the constituents of the atom.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A descriptive term for objects and events within the atom.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.