collisional


col·li·sion

C0483100 (kə-lĭzh′ən)n.1. An act of colliding; a crash.2. A condition of opposition or conflict between two or more people or things: the collision between management and labor.3. Physics A brief dynamic event consisting of the close approach of two or more particles, such as atoms, resulting in an abrupt change of momentum or exchange of energy.
[Middle English, from Late Latin collīsiō, collīsiōn-, from Latin collīsus, past participle of collīdere, to collide; see collide.]
col·li′sion·al adj.col·li′sion·al·ly adv.Synonyms: collision, crash1, impact
These nouns denote violent forcible contact between two or more things: the midair collision of two planes; a crash involving two cars; a crater produced by the comet's impact.

collisional

(kəˈlɪʒənəl) adjof or relating to a collision or collisions