christadelphian/ˌkrɪs.təˈdɛl.fɪ.ən/EtymologyCoined by English religious leader and founder of the Christadelphian movement John Thomas, from Ancient Greek Χριστός (Khristós, “Christ”) + ἀδελφός (adelphós, “brother”).adjPertaining to the Christadelphians.nounA member of a particular nontrinitarian Christian denomination founded in the mid-19th century.“When Malone next looked round he was gone. "He is one of these Second-coming fanatics," he whispered to Enid. There are a lot of them—Christadelphians, Russellites, Bible Students and what-not.”