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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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adj. - Free from or corrected for spherical aberration.

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Usage examples (4)
  • An aplanatic mirror
  • (An aplanatic triplet will be found best for this purpose.)
  • It was thought that the use of this Herschel aplanatic combination as an eyepiece, combined with the Wollaston doublet for the objective, came as near perfection as the...
  • To compute exactly the extent to which these evils have been developed he has devised a syncretic abacus, in which, on the principle of the spectroscope, the aplanatic...
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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.