triptych

noun5

1. •
   A picture or series of pictures painted on three tablets connected by hinges.
2. •
   A film or video sequence intended to be shown on a triple screen with the use of linked projectors.
3. •
   A set of three se-tenant postage stamps that form a composite picture.
4. •
   A group of three people or works, especially when considered representative of a particular field or theme.

   • Thus, with the passing years, Papa Wemba, a hardworking and introverted man, has come to embody “African pop,” forming a triptych with Youssou N’Dour and Salif Keita. — 2002
5. •
   (figurative) Any set of three closely connected ideas or objects.

   • Witchcraft, heresy, and counterfeiting formed a triptych in popular imagination and in the law. — 1994