Simpson's rule

noun Mathematics.
  1. a method for approximating the value of a definite integral by approximating, with parabolic arcs, the area under the curve defined by the integrand.

Origin of Simpson's rule

1895–1900; named after Thomas Simpson (1710–61), English mathematician
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018