Learn how to say Triptychs correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word triptych:
a picture or relief carving on three panels, typically hinged together vertically and used as an altarpiece:
a triptych depicting the Crucifixion
a set of three associated artistic, literary, or musical works intended to be appreciated together:
a triptych on the theme of the holocaust
his triptych of one-act operas is unfairly neglected
mid 18th century (denoting a set of three writing tablets hinged or tied together): from tri- ‘three’, on the pattern of diptych