noun Usually cross hairs.
Examples from the Web for crosshair
When the silver splotch drifted by the crosshair, he punched the stop button and looked at the indicator.
By azimuth, do you refer to the crosshair which is sometimes referred to as the windage crosshair?
He kept his eyes on the crosshair of the peeper, one hand over the timer button.
It may be that the mount has been bent or the crosshair ring shifted.