eyepiece

noun

eye·​piece ˈī-ˌpēs 

: the lens or combination of lenses at the eye end of an optical instrument

Examples of eyepiece in a Sentence

Recent Examples on the Web

To calculate the all-important usable magnification, divide the focal length of the telescope by the focal length of the eyepiece. —Jamie Carter, Space.com, 30 Nov. 2025

As before, budding stargazers don't get closer to galaxies and nebulae through an eyepiece, that sort of thing is handled by the smart part of this equation. —New Atlas, 21 Nov. 2025

This reference is why many place the innovation of the eyepieces to the 13th century (specifically: 1287). —Daniel Fusch, Ascend Agency, 11 Nov. 2025

Higher magnification eyepieces are generally used on planets and the moon. —Mike Lynch, Twin Cities, 9 Nov. 2025

Word History

First Known Use

1729, in the meaning defined above

Rhymes for eyepiece

• altarpiece
• centerpiece
• frontispiece
• mantelpiece
• masterpiece
• pilates
• summarise
• syntheses
• apiece
• aris
• assise
• caprice

Kids Definition

eyepiece

noun

eye·​piece ˈī-ˌpēs 

: the lens or combination of lenses at the eye end of an optical instrument (as a microscope or telescope)

Medical Definition

eyepiece

noun

eye·​piece ˈī-ˌpēs 

: the lens or combination of lenses at the eye end of an optical instrument

called also ocular