WordReference Random House Unabridged Dictionary of American English © 2025
ar•cus se•ni•lis
(är′kəs sə nī′lis),USA pronunciation [Ophthalm.]
- Ophthalmologythe appearance of a yellowish-gray lipid ring around the margin of the cornea, occurring in aging persons.
- Latin arcus senīlis literally, old man's bow
- 1785–95