noun, masculine/ˈtɾibtiko/plural: trípticos
tríptico is masculine in Spanish.
leaflet, pamphlet (in three parts); triptych
Borrowed from Ancient Greek τρίπτυχος (tríptukhos, “consisting of three layers, threefold”), from τρι- (tri-) + πτυχή (ptukhḗ, “a fold”).