ac·​cu·​mu·​la·​tor ə-ˈkyü-m(y)ə-ˌlā-tər How to pronounce accumulator (audio)
plural accumulators
: one that accumulates: such as
: a device (as in a hydraulic system) in which a fluid is collected and especially in which it is kept under pressure as a means of storing energy
British : storage battery
: a part (as in a computer) where numbers are totaled or stored
chiefly British : a betting arrangement in which winnings garnered from one bet are immediately used to finance a subsequent bet : parlay

Examples of accumulator in a Sentence

Recent Examples on the Web Using legumes/dynamic accumulators and/or animal manures to cycle nutrients through the system. Elizabeth Waddington, Treehugger, 6 June 2023 At issue are copay accumulators, which insurers use to blunt copay assistance offered by drug companies. Ed Silverman, STAT, 21 Feb. 2023 Nonetheless, accumulators are gaining most of the attention and prompting growing outrage. Ed Silverman, STAT, 20 Feb. 2023 Brent Suter has worn many hats during his tenure with the Brewers: efficient-working left-hander, win accumulator, impressionist, raptor and environmentally-conscious ballplayer. Jr Radcliffe, Milwaukee Journal Sentinel, 25 Apr. 2022 With a copay accumulator someone with a $5,000 deductible who is using a copay coupon or patient assistance will still owe that full deductible if the assistance money runs out late in the year, Koulianos said. Katie Wedell, USA TODAY, 1 Nov. 2022 In other words, the conservancy will be an accumulator and facilitator of research on what the bugs do, while the vault ensures that viable microbes are always available if and when their function is understood. Jonathon Keats, Discover Magazine, 11 June 2019 The Crohn's and Colitis Foundation published a graphic showing how patients end up paying more out of pocket for their meds when an accumulator program is in place. Katie Wedell, USA TODAY, 1 Nov. 2022 The system’s accumulator bottle, mounted behind the front bumper, is enormous—a hint of the kind of pressure required to damp and stabilize the oscillating mass above. Dan Neil, WSJ, 17 Mar. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'accumulator.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


accumulate + -or entry 1

First Known Use

circa 1611, in the meaning defined above

Time Traveler
The first known use of accumulator was circa 1611

Dictionary Entries Near accumulator

Cite this Entry

“Accumulator.” Dictionary, Merriam-Webster, Accessed 4 Oct. 2023.

Kids Definition


ac·​cu·​mu·​la·​tor ə-ˈkyü-m(y)ə-ˌlāt-ər How to pronounce accumulator (audio)
: one that accumulates
especially : a part (as in a computer) where numbers are totaled or stored

More from Merriam-Webster on accumulator

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