1) Network 2) Reticle 3) Reticule 1) Reticle 
• (n.) A design or draught which has been divided into squares, in order to reproduce it in other dimensions.
Grat'i·cule noun [ French See Graticulation. ] A design or draught which has been divided into squares, in order to reproduce it in other dimensions. 
British for Reticle.
A glass disc that is inserted at the focal plane of an eyepiece. The disc is engraved with a cross, circle and dot or a scale, so that the eyepiece can be used to centre upon, or measure, an object seen through the telescope
see field chart