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monocular

[muh-nok-yuh-ler] /məˈnɒk yə lər/
adjective
1.
having only one eye.
2.
of, pertaining to, or for the use of only one eye:
a monocular microscope.
noun
3.
a monocular instrument or device.
Origin
1630-1640
1630-40; < Late Latin monocul(us) one-eyed (see monocle) + -ar1
Related forms
monocularly, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for monocular

monocular

/mɒˈnɒkjʊlə/
adjective
1.
having to do with or using only one eye
noun
2.
a device for use with one eye, such as a field glass
Derived Forms
monocularly, 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
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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.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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monocular in Medicine

monocular mo·noc·u·lar (mŏ-nŏk'yə-lər, mə-)
adj.

  1. Having or affecting one eye only.

  2. Having a single eyepiece, as certain microscopes or other optical instruments.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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