[ kuh-top-triks ]
/ kəˈtɒp trɪks /

noun (used with a singular verb)

the branch of optics dealing with the formation of images by mirrors.

Origin of catoptrics

1560–70; < Greekkatoptrikós, equivalent to kátoptr(on) mirror (kat- cat- + op- see + -tron suffix of instruments) +-ikos -ic; see -ics


ca·top·tric, ca·top·tri·cal, adjectiveca·top·tri·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for catoptric

British Dictionary definitions for catoptric

/ (kəˈtɒptrɪks) /


(functioning as singular) the branch of optics concerned with reflection, esp the formation of images by mirrors

Derived forms of catoptrics

catoptric or catoptrical, adjective

Word Origin for catoptrics

C18: from Greek katoptrikos, from katoptron mirror
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for catoptric

[ kə-tŏptrĭk ]

Relating to the reflection of light, especially by a mirror. Catoptric lenses are used in Fresnel lenses and many telescopes. Compare catadioptric dioptric.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.