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).
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- cross bridging,
- cross buck,
- cross colour,
- cross flap,
- cross fox,
- cross hairs,
- cross index,
- cross infection,
- cross matching,
- cross my heart and hope to die
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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 sightAlso called: cross wires
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012