English Reference

Word

accumulator

Phoneticsac·cu·mu·la·tor

US/əkˈjumjəˌɫeɪtɝ/

UK/ɐkjˈuːmjʊlˌeɪtɐ/

Definition

n. a person or thing that collects and stores something over time. In computing, it is a special part of a processor that holds data while it is being worked on.

n. a person or device that collects, stores, or accumulates something, such as data, energy, or interest. In computer architecture, it refers to a register used to store intermediate arithmetic and logic results.

Examples

“The processor uses an accumulator to store the final result.”

“The bank account acts as an interest accumulator, growing the principal amount every month.”

“In early mechanical calculators, the accumulator was a physical register that held the running total of a calculation before it was transferred to the output display.”

Examples

simple

“The processor uses an accumulator to store the final result.”

contextual

“The bank account acts as an interest accumulator, growing the principal amount every month.”

complex

“In early mechanical calculators, the accumulator was a physical register that held the running total of a calculation before it was transferred to the output display.”

Real-World Examples

“The plant is fast-growing and in the same family as a known nickel accumulator.”
Phys.org · 2 Sept 2026
“They each took on the role of a different part of the machine - CPU, accumulator, RAM and program counter - and simulated the passage of instructions through the hardware.”
BBC News · 25 Aug 2010

Etymology

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

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domains

EducationEngineeringFinanceProgramming

This entry

Level
C1 · Advanced
Frequency
Occasional
Updated

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English Reference