A narrow opaque band encircling the cornea, common in old age.
- My arcus senilis of two years' duration disappeared completely after 18 months of atorvastatin (taken for a moderately raised serum cholesterol concentration).
- It appears more often in older adults (arcus senilis).
- A study of arcus senilis in Caucasian men and women is reported.
Late 18th century: Latin, literally 'senile bow'.
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Syllabification: ar·cus se·ni·lis
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