cross wire
Noun
Meaning
either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration
Source: WordNetSynonyms
Hypernyms
Examples
he had the target in his cross hairs
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
Source: WordNethe had the target in his cross hairs