# Poisson distribution

[pwah-sohn; French pwa-sawn]

- a limiting form of the binomial probability distribution for small values of the probability of success and for large numbers of trials: particularly useful in industrial quality-control work and in radiation and bacteriological problems.

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## Origin of Poisson distribution^{}

1920–25; named after S. D. Poisson (1781–1840), French mathematician and physicist

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Poisson distribution

- statistics a distribution that represents the number of events occurring randomly in a fixed time at an average rate λ; symbol P 0 (λ). For large n and small p with np = λ it approximates to the binomial distribution Bi (n,p)

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## Word Origin

C19: named after S. D. Poisson

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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## Poisson distribution

[pwä-sôɴ′]

- A probability distribution which arises when counting the number of occurrences of a rare event in a long series of trials. It is named after its discoverer, French mathematician and physicist Siméon Denis Poisson (1781-1840).

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The American Heritage® Science Dictionary
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