reticle
- n a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument
- Instead, they made their calculations with the aid of a reticle, a sighting device that projects a bull's-eye onto the command pilot's window.
- After sighting a landmark on earth with the reticle marked on the porthole, he aims and fires the retrorocket for 100 seconds, thus braking the lifeboat to a de-orbiting speed of .