an opaque circle around the cornea of the eye, often seen in elderly people
Word origin
Latin: senile bow
arcus senilis in American English
(ˈɑːrkəs səˈnailɪs)
noun
Ophthalmology
the appearance of a yellowish-gray lipid ring around the margin of the cornea, occurring in aging persons
Word origin
[1785–95; ‹ L arcus senīlis lit., old man's bow]This word is first recorded in the period 1785–95. Other words that entered Englishat around the same time include: crossover, edit, fossilize, logrolling, plateau