Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The lens or lens group closest to the eye in an optical instrument; an ocular. Also called eyeglass.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The lens (or combination of lenses) at the eye end of a microscope or telescope by which the image is viewed.

from the GNU version of the Collaborative International Dictionary of English

  • n. The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed.
  • n.

from The Century Dictionary and Cyclopedia

  • n. In an optical instrument, the lens or combination of lenses to which the eye is applied.
  • n. In entomology, the eye-covering in the pupæ of lepidopterous insects.
  • n. An eyepiece with right-angled reflection-prism attached to the eye-lens, so that the observer looks in at the side, perpendicularly to the axis of the instrument.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. combination of lenses at the viewing end of optical instruments

Etymologies

eye +‎ piece (Wiktionary)

Examples

  • Bent to the eyepiece was an old woman with long, black hair, wet as a well-used mop.

    Vermilion Drift

  • Similarly, on completing the setting out of a curve, and arriving at the end of the chord, the remote end being seen by reflection, the direction observed along the axis of the eyepiece is the new tangent.

    Scientific American Supplement, No. 832, December 12, 1891

  • Like that's not good enough, the costs for producing the eyepiece is a mere $1-2 for production in small quantities, while being able to take down the costs to a few cents on a large scale.

    Softpedia - Windows - All

  • The eyepiece is a lens I had lying around, which has a focal length of about 30mm.

    Museum Blogs

  • The drawtube holding the eyepiece is a cardboard tube, which was left over from a roll of 'Glad-wrap', also covered with the same sticky-backed material as used on the main tube.

    Museum Blogs

  • On the left side of the eyepiece is a button marked RAW/JPEG for one-touch JPEG or Raw shooting.

    ePHOTOzine News Feed

  • The type where you look through an eyepiece while turning a knob until an object comes into focus (usually a tree I use as a distance marker) then looking at the wheel with yardage markings on it.

    New Weekly Contest: Best Hunting Story Wins a Leatherman

  • Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/640s f/8.0 at 1000.0mm iso400 Question: This North American migrant is challenging to identify, but there is one obvious field mark visible in this image.

    Mystery bird: eastern willet, Tringa s. semipalmata

  • I'd considered Samco as a resource, but any Mauser action I obtain from them will have to be drilled and tapped for scope mounts, and the bolt handles on a number of them will have to reshaped to clear a scope's eyepiece.

    I'm looking for a long action to build a rifle on. Any suggestions?

  • • No more squinting into a microscope: The 3MP HiRo Cam by Premier ($190) replaces the eyepiece of any DIN-compatible microscope and lets you view your slide subject on a PC via a USB connection.

    The Best of New York Toy Fair 2009 | DVICE

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