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From back +‎ shine.


backshine (uncountable)

  1. Reflected light.
    • 1973, Edward Grant Brame, Applied spectroscopy reviews:
      [...] laser beam is a Brewster window for reducing backshine of the laser beam into the detectors placed behind the observation windows.
    • 1991, Yoshihiko Ikegami, The Empire of signs: semiotic essays on Japanese culture:
      He also speaks of the manifold images which these signs evoke as 'backshine.'
    • 2011, Vernor Vinge, The Children of the Sky:
      The Eyes Above's shadow was clearly visible now, surrounded by just a halo of backshine.


backshine (third-person singular simple present backshines, present participle backshining, simple past and past participle backshone or backshined)

  1. (transitive, intransitive) To reflect light; shine back.