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Meaning of beta function

be'ta func"tion

Pronunciation: [key]
— Math. Math.
  1. a function of two variables, usually expressed as an improper integral and equal to the quotient of the product of the values of the gamma function at each variable divided by the value of the gamma function at the sum of the variables.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.