diptych
dip·tych
noun
1.
a painting or carving (especially an altarpiece) on two panels (usually hinged like a book)
Origin
From Late Latin diptycha, plural, from Ancient Greek, neuter plural of δίπτυχος (díptukhos, “folded, doubled”), from δι- (di-) + πτυχή (ptukhḗ, “fold, layer”).
Related words
Broader terms
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