noun
triptych; three-panel set
Refers to a set of three connected panels, especially in art (e.g., a folding screen or a three-part painting). Also used for three related items presented together.
この三枚続きの屏風は江戸時代のものです。
This three-panel folding screen is from the Edo period.
展覧会で三枚続きの版画を見た。
I saw a triptych print at the exhibition.
Compound of 三枚 (three flat objects) + 続き (continuation, set). The word straightforwardly describes a set of three connected pieces.