Poisson's ratio

noun

Definition of Poisson's ratio

: the ratio of transverse to longitudinal strain in a material under tension

First Known Use of Poisson's ratio

1866, in the meaning defined above

History and Etymology for Poisson's ratio

S. Poisson

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The first known use of Poisson's ratio was in 1866

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Cite this Entry

“Poisson's ratio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Poisson%27s%20ratio. Accessed 29 Oct. 2020.

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