cross wire

Thân thiện

Definition

1. Noun:
   • Either of two fine mutually perpendicular lines that cross in the focal plane of an optical instrument and are used for sighting or calibration. This term refers to the thin lines, often etched or projected, that intersect at the center of a sighting device like a telescope, microscope, or gun scope, providing a precise point of aim or measurement.

Usage Examples

• Noun:
  • The hunter carefully aligned the animal in his scope's cross wire before taking the shot.
  • To measure the specimen accurately, the scientist centered it where the cross wires meet.

Advanced Usage

• "To have someone/something in one's cross wires": To have a person or target as the object of one's focused aim, attention, or pursuit. This is a figurative extension from the literal use in targeting.
  • The investigative journalist had the corrupt official in her cross wires for months.

Variants and Related Words

• Crosshair (or cross-hair) (n): A more common variant and synonym for "cross wire," referring to the same intersecting lines in an optical sight. The reference context indicates they are equivalent.
  • Adjust the focus until the crosshair is sharp.

Synonyms

• Reticle (n): A network of fine lines or markings in the eyepiece of an optical instrument, which may include cross wires or other patterns for measurement or aiming.
• Graticule (n): A scale or grid of lines in the eyepiece of a measuring instrument.

Related Phrases

• In the crosshairs (Idiom): To be the focus of criticism, scrutiny, or an attack. This idiom derives directly from the concept of having a target centered in a sight's cross wires.
  • After the scandal, the CEO found himself in the crosshairs of the media.

Học thuật

Noun

1. 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

Từ đồng nghĩa

• cross hair