astigmatism

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English

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Etymology

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From a- (negative prefix) + stem of Ancient Greek στίγμα (stígma, mark, point) + -ism. Coined by English polymath William Whewell in 1846.

Pronunciation

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  • (US) IPA(key): /əˈstɪɡmətɪzm̩/
  • Audio (US):(file)

Noun

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astigmatism (countable and uncountable, plural astigmatisms)

  1. (optics) A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred.
  2. (pathology) A disorder of the vision, usually due to a misshapen cornea, such that light does not focus correctly on the retina causing a blurred image.

Synonyms

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Derived terms

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Translations

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See also

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Further reading

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Romanian

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Etymology

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Borrowed from French astigmatisme. By surface analysis, astigmat +‎ -ism.

Noun

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astigmatism n (uncountable)

  1. astigmatism

Declension

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Swedish

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Swedish Wikipedia has an article on:
Wikipedia sv

Noun

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astigmatism c

  1. (optics) astigmatism
  2. (pathology) astigmatism

Declension

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Declension of astigmatism 
Uncountable
Indefinite Definite
Nominative astigmatism astigmatismen
Genitive astigmatisms astigmatismens

See also

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References

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