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Definition of astigmatism noun from the Oxford Advanced Learner's Dictionary

astigmatism

noun

/əˈstɪɡmətɪzəm/

/əˈstɪɡmətɪzəm/

[uncountable] (medical)

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a fault in the shape of a person’s eye that prevents them from seeing clearly
Word Originmid 19th cent.: from a- ‘without’ + Greek stigma ‘point’ + -ism.

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See astigmatism in the Oxford Advanced American Dictionary

Check pronunciation: astigmatism

Nearby words

noun

From the Word list

B2

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