Also di·op·tri·cal.

Origin of dioptric

From the Greek word dioptrikós, dating back to 1625–35. See diopter, -ic
Related formsdi·op·tri·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dioptric

Historical Examples of dioptric

British Dictionary definitions for dioptric



  1. of or concerned with dioptrics
  2. of or denoting refraction or refracted light
Derived Formsdioptrically, adverb
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

dioptric in Science


  1. Relating to the refraction of light, especially by a lens. Dioptric lenses are used in Fresnel lenses and camera viewfinders. Compare catadioptric catoptric.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.