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 (dī-ŏp′trĭk) also di·op·tri·cal (-trĭ-kəl)
1. Of or relating to dioptrics.
2. Relating to optical refraction; refractive.

[Greek dioptrikos, from dioptrā, an optical instrument; see diopter.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(daɪˈɒptrɪk) or


1. (General Physics) of or concerned with dioptrics
2. (General Physics) of or denoting refraction or refracted light
diˈoptrically adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(daɪˈɒp trɪk)

of or pertaining to refraction or refracted light.
Also, di•op′tri•cal.
[1625–35; < Greek dioptrikós. See diopter, -ic]
di•op′tri•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


a. dióptrico, referente a la refración de la luz.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
the "dioptrical glass," Power nonetheless depends, just as
dioptrical, tense moments of rest on the window sill.
Citing examples of lenses in museums, many of which he has tested himself, he describes the grinding technology, reading stones and the first dioptrical vision aids, glass technology and the invention of spectacles, the development of spectacles through the Middle Ages and the Renaissance, and modern lens grinding technique developed during the 16th century.