duplicationn.[L. duplicatio: cf. F. duplication.]1. The act of duplicating, or the state of being duplicated; a doubling; a folding over; a fold.()2. (Biol.) The act or process of dividing by natural growth or spontaneous action; as, the duplication of cartilage cells.(Carpenter.)duplication of the cube (Math.), the operation of finding a cube having a volume which is double that of a given cube.()