collider

noun

1. Any of several forms of particle accelerator in which two opposing beams of particles collide.
2. A node in a causal graph that has at least two incoming edges.
3. A model of the shape of an object for purposes of collision detection.

   “The race controller will check for a trigger hit between this player's collider and the start/finish line trigger, but this script has an OnTriggerEnter function to check for triggers used to force a respawn.”