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Accumulator

//əˈkjum.jəˌleɪ.tɚ// noun

Noun

1
One who, or that which, accumulates.
"He is a great accumulator of bad jokes."
2
(computer science) a register that has a built-in adder that adds an input number to the contents of the register wordnet
3
A wet-cell storage battery. British
"Looks like it's time to recharge the accumulator again."
4
a voltaic battery that stores electric charge wordnet
5
A collective bet on successive events, with both stake and winnings being carried forward to accumulate progressively.
"The largest payout for a bet on a horse race was $1,627,084 after tax, paid to Britons Anthony Speelman and Nicholas Cowan on their $64 nine-horse accumulator at Santa Anita Racecourse, California, in 1987."

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6
a person who is employed to collect payments (as for rent or taxes) wordnet
7
A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging.
8
A vessel containing pressurized hot water ready for release as steam.
9
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).
10
A register or variable used for holding the intermediate results of a computation or data transfer.
"The contents of the memory location and accumulator are NOT altered, but the Negative, Zero and Carry flags are conditioned according to the result of the subtraction."
11
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.
"This product was fairly popular among investors in Hong Kong in 2007 considering the market conditions at that time. It is an accumulator of the underlying stock with a contract period of 12 months."
12
One who takes two higher degrees simultaneously, to reduce their length of study. UK, historical
"1691–92, Anthony Wood (antiquary), Athenæ Oxonienses The first of these two was a compounder, the other who was an accumulator, was lately made provost of Trin. coll. near Dublin, and on the 31st of March 1692 was nominated bish. of Kilmore."
13
A one way membership function.

From Latin accumulātor, agent noun of accumulō (“pile up”), accumulate + -or.

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