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arcus senilis

[ahr-kuh s suh-nahy-lis] /ˈɑr kəs səˈnaɪ lɪs/
noun, Ophthalmology
1.
the appearance of a yellowish-gray lipid ring around the margin of the cornea, occurring in aging persons.
Origin
1785-1795
1785-95; < Latin arcus senīlis literally, old man's bow
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for arcus-senilis

arcus senilis

/ˈɑːkəs sɪˈnaɪlɪs/
noun
1.
an opaque circle around the cornea of the eye, often seen in elderly people
Word Origin
Latin: senile bow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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