trip·tych
noun/ˈtrɪptɪk/
/ˈtrɪptɪk/
(specialist)- a picture that is painted or carved on three pieces of wood placed side by side, especially one over an altar in a church
三联画；三联雕刻；（尤指）三折圣像画 Word Originmid 18th cent. (denoting a set of three writing tablets hinged or tied together): from tri- ‘three’, on the pattern of diptych.