interaction

[ in-ter-ak-shuh n ]

/ ˌɪn tərˈæk ʃən /

reciprocal action, effect, or influence.

Physics.

the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
the mathematical expression that specifies the nature and strength of this effect.

Origin of interaction

First recorded in 1825–35; inter- + action

in·ter·ac·tion·al, adjective

Still, after nearly a month at sea, I imagine they are eager to recharge, ready for interaction with the outside world.

Inside Sailing’s Biggest Race |Lizzie Crocker |October 11, 2014 |DAILY BEAST
The Lonely Island are really huge fans of his and have been our whole lives, so any interaction with him is great.

Imagine Andy Samberg as Your Best Man |Kevin Fallon |September 29, 2014 |DAILY BEAST
Even the tersest of responses on OKCupid is still giving an aggressive user exactly what he wants: interaction.

Online Shaming Gives Creeps the Spotlight They Deserve |Samantha Allen |September 23, 2014 |DAILY BEAST
The interaction between Obama and Corker was a tense moment in the otherwise uneventful meeting.

Exclusive: Obama Told Lawmakers Criticism of His Syria Policy is 'Horsesh*t' |Josh Rogin |August 12, 2014 |DAILY BEAST

“Our interaction with U.S. special forces has been constructive,” she said.

Obama Is Betting His Whole Afghan Plan on These Commandos |Kimberly Dozier |May 28, 2014 |DAILY BEAST
A demonstration is given in this instance of the interaction between a given genotypic constitution and a special environment.

Sex-linked Inheritance in Drosophila |Thomas Hunt Morgan
The interaction of acids and bases may be observed in another way.

General Science |Bertha M. Clark
But consciousness is a cross-section or a projection of things made by their interaction with a nervous system.

Creative Intelligence |John Dewey, Addison W. Moore, Harold Chapman Brown, George H. Mead, Boyd H. Bode, Henry Waldgrave, Stuart James, Hayden Tufts, Horace M. Kallen
We must unlearn our purely human history, and learn a history of interaction between nature and man instead.

Science in Arcady |Grant Allen
(d) The interaction in the use of deposits, notes, and other constituents in the circulating medium.

The Value of Money |Benjamin M. Anderson, Jr.

interaction

/ (ˌɪntərˈækʃən) /

a mutual or reciprocal action or influence

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

interactional, adjective