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catoptric Line breaks: cat|op¦tric
Pronunciation: /kaˈtɒptrɪk/

Definition of catoptric in English:


Relating to a mirror, a reflector, or reflection.
Example sentences
  • The jewel of the site is the catoptric light with its brass and steel clockwork to turn it.
  • Ambrose, built in 1952-53, is the only lightship equipped with a modern catoptric type lens.
  • Prior to that the single catoptric fixed white light was powered by three burners.

plural noun

[treated as singular] Back to top  
The branch of optics that deals with reflection.
Example sentences
  • It was called ‘dioptrics’ because it dealt with the refraction of light rather than with reflection (‘catoptrics’).
  • In your presence, my dear Menelaus, I am ashamed to confute a mathematical proposition, the foundation on which rests the subject of catoptrics.


Mid 16th century: from Greek katoptrikos 'reflecting', from katoptron 'mirror'.

Definition of catoptric in:

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