
any of a class of mathematical functions that arise in the solution of various classical problems of physics. These problems generally involve the ...
Found on
http://www.britannica.com/eb/a-z/s/136

A function, often named after the person who introduced it, that has a particular use in physics or some branch of mathematics. Examples include Bessel functions, Lagrange polynomials, beta functions, gamma functions, and hypergeometric functions.
Found on
http://www.daviddarling.info/encyclopedia/S/special_function.html

In Lisp or Stutter, a built-in function that may or may not fully evaluate its arguments, such as the if primitive.
Found on
http://www.encyclo.co.uk/local/20090
No exact match found.