the network of lines that appear in something such as a telescopic sight or a microscope, which help you to aim at what you are trying to hit or measure. Also called 'crosshairs' when they a [..]

1650s, from Latin reticulum "little net," diminutive of rete "net" (see reticulate (adj.)).

The aiming reference seen when looking through a telescopic sight.

A photo plate on which an enlarged copy of a semiconductor circuit layer pattern is reproduced and used in the production of photo masks.

A very tiny grid pattern inserted in an eyepiece lens.  It is used to make actual measurements of the size of objects seen through the microscope.

(n) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument

A planar, or flat, element located at the image plane of an optical system designed to measure the object imaged. The element is typically made of glass, and can have a wide variety of lines, circles, [..]

A matrix of dots, posts or lines, visible inside a rifle's telescopic sight, normally adjustable via exterior knobs for windage and elevation. After careful adjustment at a known range, the shoot [..]

A system of lines, wires, etc., placed in the focal plane of an optical instrument to serve as a reference. A cross hair is a hair, thread, or wire constituting part of a reticle. See also GRATICULE, [..]

Using two fine wires as part of a grid attached to part of the focal plane or a telescope eyepiece. This is used to locate the position and size of a celestial object.

A grid, network, or crosshatch found in the eyepiece of various optical instruments to aid measurement or alignment (obsolete) A small net * '''1833''', Francis Vesey, [http://books.google.co.uk/ [..]