backsight

Definition from Wiktionary, a free dictionary

Contents 1 English 1.1 Etymology 1.2 Noun 1.3 Verb 1.3.1 See also

[edit] English

[edit] Etymology

From the back + sight

[edit] Noun

backsight (plural backsights)

1. The rear sight of a firearm.
2. (surveying) A measurement or reading taken back towards a point of known elevation, used to calculate the height of the theodolite.
3. (surveying) A measurement of a previously shot point, used to set the angle to zero when occupying a new position.

[edit] Verb

to backsight (third-person singular simple present backsights, present participle backsighting, simple past and past participle backsighted)

1. (surveying) To shoot a backsight.

[edit] See also

• foresight
• hindsight