[ suhb-uh-tom-ik ]
/ ˌsʌb əˈtɒm ɪk /

adjective Physics.

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- + atomic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for subatomic

British Dictionary definitions for subatomic


/ (ˌsʌbəˈtɒmɪk) /


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

Medicine definitions for subatomic


[ sŭb′ə-tŏmĭk ]


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.

Culture definitions for subatomic


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.