What is Cross hair?
Cross hair definition and meaning on Dictionary terms:
noun Usually cross hairs.
Also called cross wire. one of the fine wires or fibers, strands of spider web, or the like, crossing in a focal plane of an optical instrument to center a target or object or to define a line of sight.
one of the marks that aid in the positioning of overlaying images for correct registration in printing.Compare register(def 11b).