graticule

[grat-i-kyool]

grat·i·cule

[grat-i-kyool]
noun
1.
Navigation. a network of parallels and meridians on a map or chart.
2.
Optics. a reticle.

Origin:
1885–90; < French < Latin crāticula, diminutive of crātis. See grate2, -cule
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Graticule is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a chattering or flighty, light-headed person.
Collins
World English Dictionary
graticule (ˈɡrætɪˌkjuːl)
 
n
1.  the grid of intersecting lines, esp of latitude and longitude on which a map is drawn
2.  another name for reticle
3.  a transparent scale in front of a cathode-ray oscilloscope or other measuring instrument
 
[C19: from French, from Latin crāticula, from crātis wickerwork]

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