Answer: reticle

AnswerCrossword Clue
RETICLEGrid in the eyepiece of an optical instrument
RETICLENetwork of fine lines for focusing telescopes.
RETICLENetwork of lines in the focus of an eyepiece.
RETICLENetwork, as in a gunsight.
RETICLEEyepiece grid
RETICLEOptical network
RETICLEEyepiece network
RETICLEOptical reference grid
RETICLEGrid on an eyepiece
reticlenetwork of fine lines, wires, or the like placed in the focus of the eyepiece of an optical instrument
reticlea network of lines in the eyepiece of an optical instrument