Dictionary.com
definitions
  • synonyms

quantum theory

See more synonyms for quantum theory on Thesaurus.com
noun Physics.
  1. any theory predating quantum mechanics that encompassed Planck's radiation formula and a scheme for obtaining discrete energy states for atoms, as Bohr theory.
  2. any theory that treats certain phenomena by the methods of quantum mechanics: a quantum theory of gravitation.
Show More

Origin of quantum theory

First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for quantum theory

quantum theory

noun
  1. a theory concerning the behaviour of physical systems based on Planck's idea that they can only possess certain properties, such as energy and angular momentum, in discrete amounts (quanta). The theory later developed in several equivalent mathematical forms based on De Broglie's theory and on the Heisenberg uncertainty principleSee wave mechanics
Show More
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

quantum theory in Science

quantum theory

  1. See quantum mechanics.
  2. Any of various theories that makes use of the assumptions, principles, and laws of quantum mechanics.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.