found: Britannica online, Aug. 4, 2015:Adventist (member of any one of a group of Protestant Christian churches that trace their origin to the United States in the mid-19th century and that are distinguished by their emphasis on the belief that the personal, visible return of Christ in glory (i.e., the Second Coming) is close at hand, a belief shared by many Christians. While most Adventist groups remain relatively small, the Seventh-day Adventist Church has become a significant global body, with congregations in more than 200 countries and a membership of more than 14 million.)