Two by Twos
international, home-based nontrinitarian Christian religious movement, founded in 19th-century Ireland, with secretive doctrines, whose ministers are itinerant and preach in pairs (hence the name), whose services are held in adherents’ houses
en-US/ˈtu ˈbaɪ ˈtuz/
en-GB/ˈtuː ˈbaɪ ˈtuːz/