graticule
noun
grat·i·cule ˈgra-tə-ˌkyül 
1
: reticle
2
: the network of lines of latitude and longitude upon which a map is drawn
Word History
Etymology
French, from Latin craticula fine latticework, diminutive of cratis wickerwork, hurdle
First Known Use
1914, in the meaning defined at sense 1