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BNC: 42073 COCA: 30787

astigmatism

Word family
Related topics: Illness & disability
as·tig·ma·tis·m /əˈstɪɡmətɪzəm/ noun [uncountableU]  
MIdifficulty in seeing clearly that is caused by a change in the inner shape of the eye 散光,散视
Examples from the Corpus
Origin astigmatism
(1800-1900) A-2 + Greek stigma mark, point; because there is no point at which light focuses
as·tig·ma·tis·m noun
Chinese
Syllable
Corpus

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