Usually means: Correction of spherical aberration, astigmatism.
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We found 11 dictionaries that define the word aplanatism:

General (9 matching dictionaries)
  1. aplanatism: Collins English Dictionary
  2. aplanatism: Wordnik
  3. aplanatism: Wiktionary
  4. aplanatism: Dictionary.com
  5. Aplanatism: Online Plain Text English Dictionary
  6. aplanatism: Webster's Revised Unabridged, 1913 Edition
  7. Aplanatism: AllWords.com Multi-Lingual Dictionary
  8. aplanatism: FreeDictionary.org
  9. Aplanatism: TheFreeDictionary.com

Medicine (2 matching dictionaries)
  1. aplanatism: Merriam-Webster Medical Dictionary
  2. online medical dictionary (No longer online)

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Definitions from Wiktionary (aplanatism)

▸ noun:  (optics) Lack of spherical aberration.

Similar:
aplanat, spherical aberration, anisoplanatism, lateral aberration, best form lens, longitudinal aberration, aberration, aperture, aspherics, planetary aberration, more...

Opposite:
aberration, distortion, astigmatism

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Similar:
aplanat, spherical aberration, anisoplanatism, lateral aberration, best form lens, longitudinal aberration, aberration, aperture, aspherics, planetary aberration, more...

Opposite:
aberration, distortion, astigmatism



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