Reynolds number


Rey·​nolds number ˈre-nᵊldz- How to pronounce Reynolds number (audio)
: a number characteristic of the flow of a fluid in a pipe or past an obstruction

Examples of Reynolds number in a Sentence

Recent Examples on the Web The irregular changes in position for twin longitudinal vortices have already been discovered in the supercritical Reynolds number region of a sphere with a smooth surface. Seriously Science, Discover Magazine, 16 July 2013

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

Word History


Osborne Reynolds †1912 English physicist

First Known Use

1910, in the meaning defined above

Time Traveler
The first known use of Reynolds number was in 1910

Dictionary Entries Near Reynolds number

Cite this Entry

“Reynolds number.” Dictionary, Merriam-Webster, Accessed 7 Dec. 2023.

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