Graticule

graticule - 

(1) [cartography] A network of longitude and latitude lines on a map or chart that relates points on a map to their true locations on the earth.

(2) [astronomy] A glass plate or cell with a grid or cross wires on it that rests in the focal plane of the eyepiece of a telescope, used to locate and measure celestial objects.

[Category=Geospatial ]

Source: esri, 05 May 2012 08:52:38, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation