ARCUS SENILIS Meaning of ARCUS SENILIS in English [ ˌα:kəs sɪ'nʌɪlɪs ]■ noun Medicine a narrow opaque band encircling the cornea, common in old age.OriginL., lit. 'senile bow'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004