duplication /(?)/

du·pli·ca·tion

duplication

n.
  1. The act of duplicating, or the state of being duplicated; a doubling; a folding over; a fold.
  2. The act or process of dividing by natural growth or spontaneous action; as, the duplication of cartilage cells. (Biol.)

Phrases & Compounds
duplication of the cube
the operation of finding a cube having a volume which is double that of a given cube.