eyepiece

[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 of eyepiece

First recorded in 1780–90; eye + piece

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eyepiece

Suppose we turn it in such a way that the eyepiece moves slightly outside the focus, or away from the object glass.
Pleasures of the telescope|Garrett Serviss
Looking through the eyepiece, the young inventor stood as though transfixed.
Tom Swift and His Giant Telescope|Victor Appleton
The man at the ampliscope removed his head from the eyepiece and shook his head impatiently.
The Metal Moon|Everett C. Smith
Second: Set the eyepiece slightly to the left of the reading-opening and tighten the azimuth-clamp.
The Gunner's Examiner|Harold E. Cloke

The man with the grizzled beard put his face into the fur around the eyepiece of the telescopic-'visor and twisted a dial.
Uller Uprising|Henry Beam Piper, John D. Clark and John F. Carr

British Dictionary definitions for eyepiece

eyepiece

noun

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

Medicine definitions for eyepiece

eyepiece

[ī′pēs′]

n.

The compound lens located at the end of a microscope tube nearest the eye.eyeglass

Science definitions for eyepiece

eyepiece

[ī′pēs′]

The lens or group of lenses closest to the eye in an optical instrument such as a telescope or microscope.