eyepiece

[ahy-pees]

eye·piece

[ahy-pees]
noun
the lens or combination of lenses in an optical instrument through which the eye views the image formed by the objective lens or lenses; ocular.


Origin:
1780–90; eye + piece
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Eyepiece is always a great word to know.
So is callithumpian. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
eyepiece (ˈaɪˌpiːs)
 
n
the lens or combination of lenses in an optical instrument nearest the eye of the observer

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

eyepiece eye·piece (ī'pēs')
n.
The compound lens located at the end of a microscope tube nearest the eye. Also called eyeglass.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
eyepiece   (ī'pēs')  Pronunciation Key 
The lens or group of lenses closest to the eye in an optical instrument such as a telescope or microscope.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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