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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.

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

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