crosshair
/ˈkrɔsˌhɛr/
noun
- A thin line or wire in the center of a gun sight or optical instrument (like a telescope or microscope) used to aim or measure.
- The sniper adjusted the crosshair on his rifle scope before taking the shot.
- The crosshair in the telescope helped the astronomer locate the distant star.
- She aligned the crosshair of the microscope with the center of the cell.
Synonyms