Accumulator

One who, or that which, accumulates, collects, or amasses.

An apparatus by means of which energy or power can be stored, such as the cylinder or tank for storing water for hydraulic elevators, the secondary or storage battery used for accumulating the energy of electrical charges, etc.

A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging.

(computer science) a register that has a built-in adder that adds an input number to the contents of the register