crosshair

crosshair — noun

1. a pair of thin lines or wires inside an optical device such as a telescope, micr

1.名詞B2
釋義

a pair of thin lines or wires inside an optical device such as a telescope, microscope, or gun sight that help the user aim, center, or measure a target precisely

例句

Wren adjusted the telescope until the <hl>crosshair</hl> was centered on the lighthouse.

collocation: center the crosshair on [target]

Mateo lined up the microscope's <hl>crosshair</hl> with the cell nucleus before the photograph.

同義詞
  • reticle

    more technical term used in optics and engineering; crosshair is the everyday word for the same thing

  • graticule

    a grid or network of lines in an eyepiece; a crosshair is one type of graticule

  • sight

    broader term that includes the whole aiming device, not just the lines

用法筆記

The literal sense is used mainly in technical contexts (surveying, microscopy, marksmanship, astronomy). The plural form 'crosshairs' is far more common in everyday language, especially in the figurative idiom 'in the crosshairs.'

常見錯誤

❌He used the crosshair to aim the camera.
✅He used the crosshair in the viewfinder to frame the shot.
💡The crosshair is inside the viewfinder, not a tool held in the hand.