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eyepiece

[ahy-pees] /ˈaɪˌpis/
noun
1.
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 of eyepiece
1780-1790
First recorded in 1780-90; eye + piece
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for eyepiece
Historical Examples
  • A man sat in a chair on the platform at the microscope's eyepiece.

    Beyond the Vanishing Point Raymond King Cummings
  • She is our eyepiece to keep us cognizant of our opportunities.

    A Labrador Doctor

    Wilfred Thomason Grenfell
  • Putting a drop of the magter's blood on the slide, she bent over the eyepiece.

    Planet of the Damned Harry Harrison
  • She turned back to the microscope and bent over the eyepiece.

    Planet of the Damned Harry Harrison
  • He lifted his gaze from the eyepiece of the instrument and settled in on the chemist.

    Cum Grano Salis Gordon Randall Garrett
  • The other lens, the eyepiece forms a virtual image of this real image.

    Physics Willis Eugene Tower
  • The telescope consists of two lenses, the eyepiece and the objective.

    Physics Willis Eugene Tower
  • Why, when he was a junior Lieutenant … he straightened up from the eyepiece….

    The Story of Our Submarines

    John Graham Bower
  • Amidship, Kass was again studying the eyepiece of the ampliscope.

    The Metal Moon Everett C. Smith
  • Frequent examination of the eyepiece should be made and the eyepiece cooled if necessary.

    Astronomy David Todd
British Dictionary definitions for eyepiece

eyepiece

/ˈaɪˌpiːs/
noun
1.
the lens or combination of lenses in an optical instrument nearest the eye of the observer
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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eyepiece in Medicine

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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eyepiece in Science
eyepiece
  (ī'pēs')   
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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