strobotron

[ stroh-buh-tron, strob-uh- ]
/ ˈstroʊ bəˌtrɒn, ˈstrɒb ə- /

noun Electronics.

a glow lamp, used in stroboscopes, that gives very bright flashes of light in response to voltage pulses.

Origin of strobotron

1935–40; strobo- (see stroboscope) + -tron