The term raptorial implies much the same as "predatory", but most often refers to modifications of an arthropod's foreleg that make it function for the grasping of prey while it's consumed, where the gripping surfaces are formed from the opposing faces of two successive leg segments (see illustration). This is distinctly different from the grasping mechanism of a structure such as a scorpion's claw (a "chela") in which one of the opposing surfaces is an articulated digit, and not a leg segment.… (More on Raptorial)