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.
(surveying) To shoot a backsight.
Other Word Forms of Backsight
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Words Starting With B and Ending With T