Definition: Of or pertaining to a factory.
Definition: Related to factorials.
Definition: A name given to the factors of a continued product when
the former are derivable from one and the same function F(x) by
successively imparting a constant increment or decrement h to the
independent variable. Thus the product F(x).F(x + h).F(x + 2h) . . .
F[x + (n-1)h] is called a factorial term, and its several factors take
the name of factorials.
Definition: The product of the consecutive numbers from unity up to
any given number.