astigmatism

English

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

astigmatism (countable and uncountable, plural astigmatisms)

(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.
(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.

defect of a lens

Arabic: لَابُؤْرِيّة f (lābuʔriyya), اللَانُقَطِيَّة f (al-lānuqaṭiyya)
Egyptian Arabic: استجماتيزم m (estegmatezm)
Chinese:
Mandarin: 像散 (zh) (xiàngsàn)
Danish: astigmatisme c
Finnish: astigmaattisuus (fi)
German: Astigmatismus m
Greek: αστιγματισμός (el) m (astigmatismós)
Indonesian: astigmatisme
Irish: aistiogmatacht f
Italian: astigmatismo (it) m
Japanese: 非点収差 (ひてんしゅうさ, hiten shūsa)
Malay: astigmatisme
Norwegian:
Bokmål: astigmatisme m

Nynorsk: astigmatisme m
Polish: astygmatyzm (pl)
Portuguese: astigmatismo (pt)
Romanian: astigmatism (ro) n
Russian: астигмати́зм (ru) m (astigmatízm)
Spanish: astigmatismo (es) m
Thai: สายตาเอียง (sǎai-dtaa-iiang)
Turkish: astigmatizm (tr)

disorder of the vision

Armenian: աստիգմատիզմ (hy) (astigmatizm)
Catalan: astigmatisme m
Chinese:
Mandarin: 散光 (zh) (sǎnguāng), 亂視／乱视 (zh) (luànshì)
Czech: astigmatismus (cs) m
Danish: astigmatisme c
Finnish: hajataittoisuus (fi)
French: astigmatisme (fr) m
German: Astigmatismus m
Greek: αστιγματισμός (el) m (astigmatismós)
Irish: aistiogmatacht f
Italian: astigmatismo (it) m
Japanese: 乱視 (ja) (らんし, ranshi)
Mongolian:
Cyrillic: харааны гажиг (xaraany gažig), астигматизм (astigmatizm), хараа сарнил (xaraa sarnil) (China)
Norwegian:
Bokmål: astigmatisme m

Nynorsk: astigmatisme m
Polish: astygmatyzm (pl) m
Portuguese: astigmatismo (pt) m
Romanian: astigmatism (ro) n
Russian: астигмати́зм (ru) m (astigmatízm)
Spanish: astigmatismo (es) m
Thai: สายตาเอียง (sǎai-dtaa-iiang)
Turkish: astigmatizm (tr)

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

astigmatism n (uncountable)

declension of astigmatism (singular only)

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