gunsight
nounEtymology From gun + sight.
1
An optical instrument which establishes an optical line or axis for the purpose of aiming a weapon.
2
In particular, especially in allusions and comparisons, a notch.
- I could just see the nick, like a gunsight, in the ridge of rock through which the road passes into the coastal plain of Tihamah. The nick is called Bab al-Naqah, the Gate of the She-Camel, after an unmistakable humped rock by the road.2011, Tim Mackintosh-Smith, Yemen: