Relating to, caused by, or involving a collision or impact between objects or bodies.
From 'collision' (from Latin 'collidere,' to strike together) plus the suffix '-al.' This scientific term developed with physics and astronomy to describe impact phenomena.
In geology and astronomy, 'collisional' describes massive events like when continents collide creating mountains, or when asteroids collided with Earth—collisional events literally shaped the planet we live on!
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