reflector

Etymology

reflect + -or

noun

1. Something which reflects heat, light or sound, especially something having a reflecting surface.
2. A reflecting telescope.
3. A small, often red, reflecting disk on the rear of a vehicle or bicycle that reflects the headlights of other vehicles.
4. A safety reflector.
5. One who reflects on something; one who thinks or considers at length.
   Most reflectors on leadership are comfortable thinking of "ethical" and "unethical" as modifiers of leadership. 1993, Robert W. Terry, Authentic Leadership: Courage in Action, page 48
   Nonreflectors simply thought through that which they already knew, reflectors evaluated experiences by interpreting these experiences, and critical reflectors re-evaluated their presuppositions to correct distortions in reasoning and attitudes. 2017, Joke van Velzen, Metacognitive Knowledge, page 154
6. (cellular automata) A pattern which can change the direction and/or offset of an oncoming spaceship without being destroyed.