central government(A system in which a governing or administrative body has a certain degree of power or authority to prevail in the management of local, national and international matters)
centrifugation(Separation of particles from a suspension in a centrifuge: balanced tubes containing the suspension are attached to the opposite ends of arms rotating rapidly about a central point; the suspended particles are forced outwards, and collect at the bottoms of the tubes)
decay product(An isotope formed by the radioactive decay of some other isotope. This newly formed isotope possesses physical and chemical properties that are different from those of its parent isotope, and may also be radioactive)
