ARCUS
\ˈɑːkəs], \ˈɑːkəs], \ˈɑː_k_ə_s]\
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By Princeton University
By DataStellar Co., Ltd
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[Latin] A bow. A senilis, A. senilis corneae, a whitish ring occurring in old people in the cornea near and concentric with its margin; due to deposition of a hyaline material. A. senilis lentis, an opaque ring frequently occurring in old people in the crystalline lens near its equator. A. palatini, the pillars of the fauces comprising A. glosso-palatinus, or anterior, and A. pharyngo-palatinus, or posterior pillar.
By Alexander Duane