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| 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 |
| 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 | |