catoptrics

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English

Noun

catoptrics (uncountable)

  1. The branch of optics dealing with reflection.
    • 1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: , 2nd edition, Oxford, Oxfordshire: John Lichfield and James Short, for Henry Cripps, →OCLC:
      , I.iii.3:
      'tis ordinary to see strange uncouth sights by catoptrics; who knows not that if in a dark room the light be admitted at one only little hole, and a paper or glass put upon it, the sun shining will represent on the opposite wall all such objects as are illuminated by his rays?