See more synonyms for optic on Thesaurus.com
  1. the eye.
  2. a lens of an optical instrument.

Origin of optic

1535–45; < Medieval Latin opticus < Greek optikós, equivalent to opt(ós) seen (verbid of ópsesthai to see) + -ikos -ic
Related formsin·ter·op·tic, adjectivenon·op·tic, adjectivepost·op·tic, adjectivepre·op·tic, adjectivesub·op·tic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for optic


  1. of or relating to the eye or vision
  2. a less common word for optical
  1. an informal word for eye 1

Word Origin for optic

C16: from Medieval Latin opticus, from Greek optikos, from optos visible, seen; related to ōps eye


  1. British trademark a device attached to an inverted bottle for dispensing measured quantities of liquid, such as whisky, gin, etc
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

Word Origin and History for optic

early 15c., from Middle French optique, obtique (c.1300) and directly from Medieval Latin opticus "of sight or seeing," from Greek optikos "of or having to do with sight," from optos "seen, visible," from op-, root of opsesthai "be going to see," related to ops "eye," from PIE *okw- "to see" (see eye (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

optic in Medicine


  1. Of or relating to the eye or vision.
  2. Of or relating to the science of optics or optical equipment.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

optic in Science


  1. Relating to or involving the eye or vision.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.