collision

The collisions between machines produce sparks, and sometimes even balls of fire.

The auction house described it as a "cultural phenomenon" and an "incisive commentary on the collision of artistic production and commodity value".

These interactions allow electrons to pair up into what are known as Cooper pairs, which move in sync through the material, avoiding atomic collisions and preventing energy loss as heat.

Craven was helping motorists involved in a traffic collision when she was fatally struck.

Roth, in Mr. Zipperstein’s telling, probed Jewish life—and its collision with American ambition—with more fidelity than any rabbinic sermon could offer.