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interaction

[in-ter-ak-shuhn] Example Sentences Origin

in·ter·ac·tion

[in-ter-ak-shuhn]
noun
1.
reciprocal action, effect, or influence.
2.
Physics.
a.
the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
b.
the mathematical expression that specifies the nature and strength of this effect.

Origin:
1825–35; inter- + action

in·ter·ac·tion·al, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Interaction is always a great word to know.
So is heat. Does it mean:
nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings
the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum
Example Sentences
  • One possibility is what techies call human interaction systems.
  • One might distinguish texting from interaction with a robot by saying that it involves one human communicating with another.
  • Widespread adoption of the new standard is likely to make it impossible for any one company to hold sway over online interaction.
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Collins
World English Dictionary
interaction (ˌɪntərˈækʃən)
 
n
1.  a mutual or reciprocal action or influence
2.  physics strong interaction electromagnetic interaction fundamental interaction gravitational interaction weak interaction See electroweak interaction the transfer of energy between elementary particles, between a particle and a field, or between fields
 
inter'actional
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

interaction
1832, from inter- + action. The verb interact is first attested 1839.
Online Etymology Dictionary, © 2010 Douglas Harper
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