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strobotron

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

noun

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


Etymology

Origin of strobotron

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