1.  accumulator(n = noun.person) collector, gatherer - a person who is employed to collect payments (as for rent or taxes);
is a kind of worker
has particulars: conductor, gleaner, rent collector, gardner, isabella stewart gardner

2.  accumulator(n = noun.artifact) storage battery - a voltaic battery that stores electric charge;
is a kind of galvanic battery, voltaic battery
has parts: anode, cathode, grid, storage-battery grid, secondary cell, storage cell
has particulars: lead-acid accumulator, lead-acid battery, nicad, nickel-cadmium accumulator, nickel-iron accumulator, nickel-iron battery

3.  accumulator(n = noun.artifact) accumulator register - (computer science) a register that has a built-in adder that adds an input number to the contents of the register;
is a kind of register

1.  One who, or that which, accumulates, collects, or amasses. [1913 Webster]

2.  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. [1913 Webster]

3.  A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging. [1913 Webster]

accumulator, n.
1 Brit. a rechargeable electric cell.
2 a bet placed on a sequence of events, the winnings and stake from each being placed on the next.
3 a register in a computer used to contain the results of an operation.
4 a person who accumulates things.

accumulator register, lead-acid accumulator, nickel-cadmium accumulator, nickel-iron accumulator