accumulator
Concise Oxford English Dictionary © 2008 Oxford University Press:
accumulator/əˈkjuːmjəleɪtə(r)/
▶noun
- 1 a person or thing that accumulates.
- 2 Brit. a large rechargeable electric cell.
- 3 Brit. a bet placed on a series of events, the winnings and stake from each being placed on the next.
'accumulator' also found in these Oxford entries:

