Definition of "collisional" [collisional]

• Of or pertaining to collisions (especially between particles) (adjective)

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• "So it is not physically impossible to re-emit at the same frequency, it is indeed physically perfectly normal to do so, but in different conditions other mechanisms such as collisional de-excitation will interupt the re-emission at that same frequency."
• "Since such dusts must be continually replenished, they are generally assumed to be the collisional fragments of residual planetesimals analogous to the Kuiper Belt objects."
• "Astrophysicists have reached a consensus on the formation of terrestrial planets: it happens through collisional accumulation of small objects."