Poisson

/ pwasɔ̃ /

noun

Siméon Denis (simeɔ̃ dəni). 1781–1840, French mathematician, noted for his application of mathematical theory to physics, esp electricity and magnetism

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Example Sentences

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The behavior of elastic materials is partially described by Poisson's ratio, which explains how the material changes shape when you stretch or squeeze it in one direction.

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Most materials have a positive Poisson's ratio, which means squeezing them in one direction will make them wider and/or thicker in other directions.

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Auxetics have a negative value of Poisson's ratio and do exactly the reverse.

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Another way of expressing Poisson's ratio is that it describes the relationship between shape and volume when one of these changes.

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As he prepared for the show to open in April, Di Donna gently blew on “Poisson” and it performed on cue, doing a delicately turning dance in response — a perfect bit of inspiration for art lovers who want to get in the swim of things this spring.