reticle

[ret-i-kuhl]

ret·i·cle

[ret-i-kuhl]
noun Optics.
a network of fine lines, wires, or the like placed in the focus of the eyepiece of an optical instrument.
Also, reticule.


Origin:
1650–60; < Latin rēticulum little net, equivalent to rēt- (stem of rēte) net + -i- -i- + -culum -cle1
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Reticle 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
reticle or (less commonly) reticule (ˈrɛtɪkəl)
 
n
Also called: graticule a network of fine lines, wires, etc, placed in the focal plane of an optical instrument to assist measurement of the size or position of objects under observation
 
[C17: from Latin rēticulum a little net, from rēte net]
 
reticule or (less commonly) reticule
 
n
 
[C17: from Latin rēticulum a little net, from rēte net]

Collins English Dictionary - Complete & Unabridged 10th Edition
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