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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - A unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters.

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Usage examples (34)
  • In other words, a full diopter weaker than YOU prescribed?
  • Adjusting the diopter the right way makes all the difference.
  • Locate the focusing ring called the right eye diopter and close your left eye.
  • It features the pro-style round eyepiece with eyepiece curtain and side diopter.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.