décadenasser, v.a., to unpadlock.
décadence, n.f., decay, decline, wane, downfall.
décadi, n.m., decadi (the tenth day of a decade in the calendar of the first French Republic).
décaèdre, adj., decahedral.
décaèdre, n.m., (geom.) decahedron.
décagone, n.m., (fort., geom.) decagon.
décagone, adj., decangular, decagonal.
décagramme, n.m., decagram (5·64 drams avoirdupois).
décaissage, n.m., uncasing, unpacking.
décaisser, v.a., to take out of its box, to unpack.