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arcus senilis

[ahr-kuh s suh-nahy-lis]
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noun Ophthalmology.
  1. the appearance of a yellowish-gray lipid ring around the margin of the cornea, occurring in aging persons.
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Origin of arcus senilis

First recorded in 1785–95, arcus senilis is from the Latin word arcus senīlis literally, old man's bow
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for arcus senilis

arcus senilis

noun
  1. an opaque circle around the cornea of the eye, often seen in elderly people
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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