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interaction

[in-ter-ak-shuh n] /ˌɪn tərˈæk ʃən/
noun
1.
reciprocal action, effect, or influence.
2.
Physics.
  1. the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
  2. the mathematical expression that specifies the nature and strength of this effect.
Origin
1825-1835
1825-35; inter- + action
Related forms
interactional, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for inter action

interaction

/ˌɪntərˈækʃən/
noun
1.
a mutual or reciprocal action or influence
2.
(physics) the transfer of energy between elementary particles, between a particle and a field, or between fields See strong interaction, electromagnetic interaction, fundamental interaction, gravitational interaction, weak interaction, electroweak interaction
Derived Forms
interactional, adjective
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
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Word Origin and History for inter action

interaction

n.

1812, from inter- + action.

Online Etymology Dictionary, © 2010 Douglas Harper
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