cross hair
or cross·hair
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).
Words nearby cross hair
British Dictionary definitions for cross hairs
cross hairs
pl n
two fine mutually perpendicular lines or wires that cross in the focal plane of a theodolite, gunsight, or other optical instrument and are used to define the line of sight
Also called: cross wires