(statistics) A continuous, symmetric probability distribution defined in terms of its quantile function, typically used to identify an appropriate distribution.

(physics, statistical mechanics) A particular probability distribution originally defined and used for describing particle speeds in idealized gases. Mathematically, it is the chi distribution with three degrees of freedom (the components of the velocity vector in Euclidean space), with a scale parameter measuring speeds in units proportional to the square root of the ratio of temperature and particle mass.

(mathematics) Any member of two families of probability distributions defined with the Mittag-Leffler function.