from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A faint whitish ring around the iris in elderly people; discoloration of the iris with age.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a whitish deposit in the shape of an arc that is sometimes seen in the cornea
From Latin, arcus + senilis (Wiktionary)
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