Adventist (n.)youdaoicibaDictYouDict[Adventist 词源字典]
"one of a religious denomination that believes in or looks for the early second coming of Christ," 1843; see advent + -ist. Church Latin adventus was applied to the coming of the Savior, both the first or the anticipated second, hence Adventist was a name applied to millenarian sects, especially and originally the Millerites (U.S.).[Adventist etymology, Adventist origin, 英语词源]