GRATICULE
reticle, reticule, graticule
(noun) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument
Source: WordNet® 3.1
Etymology
Noun
graticule (plural graticules)
A grid of horizontal and vertical lines.
(specifically, optics, British) A reticle.
(specifically, geography) The network of lines of latitude and longitude that make up a coordinate system such as the one used for the Earth.
A nearly square or nearly rectangular region created by a graticule.
Anagrams
• curtilage, cutigeral
Source: Wiktionary
Grat"i*cule, n. Etym: [F. See Graticulation.]
Definition: A design or draught which has been divided into squares, in
order to reproduce it in other dimensions.
Source: Webster’s Unabridged Dictionary 1913 Edition