reticle
/ˈrɛtɪkəl/
noun
- A grid or pattern of lines in the eyepiece of a telescope, microscope, or other optical device, used for measuring or aiming.
- The sniper aligned the target with the crosshairs of the reticle.
- The telescope's reticle made it easier to track the star's movement.
- Under the microscope, the reticle helped measure the size of the cell.
Synonyms