backsight

backsight
/bak"suyt'/, n. Survey.
1. a sight on a previously occupied instrument station.
2. (in leveling) the reading on a rod that is held on a point of known elevation, used in computing the elevation of the instrument.
[1840-50; BACK2 + SIGHT]

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Universalium. 2010.

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  • Backsight — Back sight (b[a^]k s[imac]t ), n. [Back, adv. + sight.] (Surv.) The reading of the leveling staff in its unchanged position when the leveling instrument has been taken to a new position; a sight directed backwards to a station previously occupied …   The Collaborative International Dictionary of English

  • backsight — 1. noun a) The rear sight of a firearm. b) A measurement or reading taken back towards a point of known elevation, used to calculate the height of the theodolite. 2. verb To shoot a backsight …   Wiktionary

  • backsight — n. rear sight on a firearm; (in leveling) reading on a rod which is held on a point of known elevation …   English contemporary dictionary

  • backsight — /ˈbæksaɪt/ (say baksuyt) noun Surveying 1. a sight on a previously occupied instrument station. 2. the reading on a levelling staff that is held on a point of known elevation, used in computing the elevation of the levelling instrument …  

  • backsight — n. 1 the sight of a rifle etc. that is nearer the stock. 2 Surveying a sight or reading taken backwards or towards the point of starting …   Useful english dictionary

  • blow a backsight — verb To occupy a point, then enter the wrong point for the backsight, or forget to enter the backsight …   Wiktionary

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