köken: Literally, “year of Christ”. ellipsis of ano de Nosso Senhor Jesus Cristo. Ultimately from Medieval Latin annō Dominī nostrī Iēsū Christī. Compare Spanish año de Cristo.
the Common Era · The basis point for measuring years in a calendar; the year 0 for any given time-reckoning system. · The era of all emperors to have ever ruled Japan, starting with Emperor Jinmu's supposed ascension in 660 BCE, established in 1872 (5th year of the Meiji era).