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Definition of Poisson distribution
1. Noun. A theoretical distribution that is a good approximation to the binomial distribution when the probability is small and the number of trials is large. 
Definition of Poisson distribution
1. Noun. (statistics) A limit of the binomial distribution for very large numbers of trials and a small probability of success. ¹
¹ Source: wiktionary.com
Medical Definition of Poisson distribution
1. 



