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monocular

[muh-nok-yuh-ler]
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adjective
  1. having only one eye.
  2. of, relating to, or for the use of only one eye: a monocular microscope.
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noun
  1. a monocular instrument or device.
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Origin of monocular

1630–40; < Late Latin monocul(us) one-eyed (see monocle) + -ar1
Related formsmo·noc·u·lar·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for monocular

Historical Examples

  • The little microscope was an excellent one, though only a monocular.

    Badge of Infamy

    Lester del Rey

  • Nystagmus occasionally occurs in monocular fixation (with exclusion of the other eye).

  • These are the retinal field of vision, the monocular field, and the binocular field.

    Visual Illusions

    Matthew Luckiesh

  • Even the doctor, himself a hardened man of the sea, showed a brilliant spark of emotion behind his monocular attic window.

    Plum Pudding

    Christopher Morley

  • Monocular, mon-ok′ū-lar, adj. with one eye only: fitted only for one eye at a time.


British Dictionary definitions for monocular

monocular

adjective
  1. having to do with or using only one eye
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noun
  1. a device for use with one eye, such as a field glass
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Derived Formsmonocularly, adverb

Word Origin

C17: from Late Latin monoculus one-eyed
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 monocular

adj.

1630s, from Late Latin monoculus "one-eyed," from Greek monos "alone, single" (see mono-) + Latin oculus "eye" (see eye (n.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

monocular in Medicine

monocular

(mŏ-nŏkyə-lər)
adj.
  1. Having or affecting one eye only.
  2. Having a single eyepiece, as certain microscopes or other optical instruments.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.