Cross hair definitions

cross hair

[n] - either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration
Found on http://www.webdictionary.co.uk/definition.php?query=cross%20hair

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cross hair

cross wire noun 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`
Found on https://www.encyclo.co.uk/local/20974

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