arcus senilis
noun
arcus se·nil·is
-sə-ˈnil-əs 
: a whitish ring-shaped or bow-shaped deposit in the cornea that frequently occurs in old age
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“Arcus senilis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/arcus%20senilis. Accessed 15 Dec. 2024.
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