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.
This three-panel folding screen is from the Edo period.
I saw a triptych print at the exhibition.
Standard kanji spelling for a triptych or three-panel set.
Abbreviated spelling, dropping the okurigana き. Seen in some contexts.
Mixed kanji-kana spelling, using つづき instead of 続き.
Compound of 三枚 (three flat objects) + 続き (continuation, set). The word straightforwardly describes a set of three connected pieces.