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cross wire is a 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". It carries one recorded sense.
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”
Definitions, synonyms and semantic relations for cross wire come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.