cross hair

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cross hair

or cross·hair (krôs′hâr′, krŏs′-)

Either of two fine strands of wire crossed in the focus of the eyepiece of an optical instrument and used as a calibration or sighting reference.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Noun

cross hair - either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration; "he had the target in his cross hairs"

cross wire

graticule, reticle, reticule - a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument

line - a mark that is long relative to its width; "He drew a line on the chart"

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In this paper, we compare the outcomes of advanced Parkinson's disease (PD) patients at our center who received frame-based DBS surgery involving the use of a cross hair with those for patients who received the surgery without the application of the cross hair.

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In the case of line and a turn to the left, the points should be to the right of the cross hair on the horizontal centerline of the target, Vidovic continues.

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Hole size is adjustable from 1/2"- 8", and centers are found with a cross hair sight gage.