an african ground squirrel of the genus xerus, having spiny fur, very short ears, and a long tail, and including the species x. rutilus of northeastern africa and x. erythropus of western and central africa.
519?–465 b.c, king of persia 486?–465 (son of darius i). noun ?519–465 bc, king of persia (485–465), who led a vast army against greece. his forces were victorious at thermopylae but his fleet was defeated at salamis (480) and his army at plataea (479)
xfcn external function
xfree86 project, inc. operating system, graphics a non-profit organisation that produces xfree86, a freely redistributable implementation of the x window system that runs on unix and unix-like operating systems and os/2. the xfree86 project has traditionally focused on intel x86 based platforms (hence the “86”), but the current release supports other platforms. (http://xfree86.org/). (1999-04-02)
xfun a polymorphic functional language which is a cross between sml and russell, developed by s. dalmas firstname.lastname@example.org of inria in 1991, and intended for computer algebra. [“a polymorphic functional language applied to symbolic computation”, s. dalmas, proc intl symp symb alg comp, berkeley 1992]. (1995-02-03)
xfs extensions for financial services