General Science


  • noun the pulse of an electric circuit
  • verb to send a pulse, usually on the selection line, of an electronic circuit


  • A repeatable and artificially produced burst of bright light. Such a flash is usually generated by applying a high voltage to an electrode of a tube containing an inert gas such as xenon. The gas becomes ionized, which permits it to rapidly discharge the energy previously stored in a capacitor. Used, for instance, in photography, or in visual special effects. Also called electronic flash, flash (2), or photoflash.
  • To cause a strobe (3) to flash.
  • On a display device such as a radar screen, a spot, such as a blip, which serves as a reference for deriving information such as range, bearing, or elevation.
  • abbreviation forstroboscope


  • noun a lamp which produces intermittent flashes of very bright light and is used by someone on the ground to attract the attention of aircraft