cross hair

or crosshair

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).

Origin of cross hair

First recorded in 1880–85

Words nearby cross hair

crossfoot, cross fox, cross-garnet, cross-gartered, cross-grained, cross hair, cross hairs, crosshatch, crosshead, cross index, cross infection

Example sentences from the Web for cross hair

Then the screw was turned till the cross-hair bisected the deflected image of the slit.
Experimental Determination of the Velocity of Light|Albert A. Michelson
After the cross-hair indicators and the level have been attached to the camera, adjustments are necessary.
The Boy Mechanic, Book 2|Various
The "radius of measurement" is the distance between the front face of the revolving mirror and the cross-hair of the micrometer.
Experimental Determination of the Velocity of Light|Albert A. Michelson

单词	cross hair
释义	cross hair or crosshair 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). Origin of cross hair First recorded in 1880–85 Words nearby cross hair crossfoot, cross fox, cross-garnet, cross-gartered, cross-grained, cross hair, cross hairs, crosshatch, crosshead, cross index, cross infection Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for cross hair Then the screw was turned till the cross-hair bisected the deflected image of the slit. Experimental Determination of the Velocity of Light\|Albert A. Michelson After the cross-hair indicators and the level have been attached to the camera, adjustments are necessary. The Boy Mechanic, Book 2\|Various The "radius of measurement" is the distance between the front face of the revolving mirror and the cross-hair of the micrometer. Experimental Determination of the Velocity of Light\|Albert A. Michelson
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