arcus senilis

[ahr-kuhs suh-nahy-lis]

ar·cus se·ni·lis

[ahr-kuhs suh-nahy-lis]
noun Ophthalmology.
the appearance of a yellowish-gray lipid ring around the margin of the cornea, occurring in aging persons.

Origin:
1785–95; < Latin arcus senīlis literally, old man's bow
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Arcus senilis has a plethora of syllables.
So is sesquipedalianism. Does it mean:
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
given to using long words.
Collins
World English Dictionary
arcus senilis (ˈɑːkəs sɪˈnaɪlɪs)
 
n
an opaque circle around the cornea of the eye, often seen in elderly people
 
[Latin: senile bow]

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