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SINCE 1828
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rotary pump

noun
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Definition of rotary pump

: a valveless pump in which the fluid is positively pushed by meshing vanes on parallel revolving shafts and meshing screws into the discharge pipe

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First Known Use of rotary pump

1799, in the meaning defined above

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The first known use of rotary pump was in 1799

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Cite this Entry

“Rotary pump.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rotary%20pump. Accessed 28 Oct. 2020.

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