Etymology

Noun

1. One who, or that which, accumulates.

   He is a great accumulator of bad jokes.

2. A wet-cell storage battery.

   Looks like it's time to recharge the accumulator again.

3. A collective bet on successive events, with both stake and winnings being carried forward to accumulate progressively.
4. A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging.
5. A vessel containing pressurized hot water ready for release as steam.
6. A container which stores hydraulic power for release, in the form of a pressurized fluid (often suspended within a larger tank of fluid under pressure).
7. A register in a calculator or computer used for holding the intermediate results of a computation or data transfer.
8. A derivative contract under which the seller commits to sell shares of an underlying security at a certain strike price, which the buyer is obligated to buy.