Student's t distribution

or Student t distribution

noun Statistics.
  1. a bell-shaped probability distribution that is flatter or more stretched out than the normal distribution.

Origin of Student's t distribution

1925–30; after Student, pseudonym of William Sealy Gosset (1876–1937), English statistician; t represents a random variable in the equation describing this type of distribution
Also called t distribution.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018