backsight
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English[edit]
Etymology[edit]
Noun[edit]
backsight (plural backsights)
- The rear sight of a firearm.
- (surveying) A measurement or reading taken back towards a point of known elevation, used to calculate the height of the surveying instrument (theodolite, transit, total station).
- (surveying) A measurement of a previously shot point, used to set the angle to zero when occupying a new position.
Derived terms[edit]
Translations[edit]
Verb[edit]
backsight (third-person singular simple present backsights, present participle backsighting, simple past and past participle backsighted)