# Definition of Poisson's ratio

Word Frequency

## Poisson's ratio

### Definitions

noun

a measure of the elastic properties of a material expressed as the ratio of the fractional contraction in breadth to the fractional increase in length when the material is stretched. Symbol: μ, ν

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## Poisson's ratio in Mechanical Engineering*Powered by* COBUILD (pwɑsoʊnz reɪʃoʊ)

### Definitions

noun

(Mechanical engineering: Materials) The Poisson's ratio is the decrease in the breadth or thickness of a bar when it is stretched by a particular amount. This term is named for French mathematician Siméon Poisson (1781-1840) ⇒ The ratio of the lateral contraction of a material to the longitudinal extension is Poisson's ratio. ⇒ Cork and concrete are materials with a very low value of Poisson's ratio. ⇒ The Poisson's ratio is the decrease in the breadth or thickness of a bar when it is stretched by a particular amount.

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## Nearby words of 'Poisson's ratio'

- poisonwood
- Poisson
- Poisson distribution
- Poisson's ratio
- Poitiers
- poitín
- Poitou

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