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cross hair

or crosshair

noun, Usually, cross hairs
1.
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.
2.
one of the marks that aid in the positioning of overlaying images for correct registration in printing.
Compare register (def 11b).
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for crosshair
Historical Examples
  • He kept his eyes on the crosshair of the peeper, one hand over the timer button.

    Anchorite Randall Garrett
  • It may be that the mount has been bent or the crosshair ring shifted.

    Warren Commission (3 of 26): Hearings Vol. III (of 15) The President's Commission on the Assassination of President Kennedy
  • When the silver splotch drifted by the crosshair, he punched the stop button and looked at the indicator.

    Anchorite Randall Garrett
  • By azimuth, do you refer to the crosshair which is sometimes referred to as the windage crosshair?

    Warren Commission (3 of 26): Hearings Vol. III (of 15) The President's Commission on the Assassination of President Kennedy

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