Abney level


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Abney level

(ˈæbnɪ)
n
(Surveying) a surveying instrument consisting of a spirit level and a sighting tube, used to measure the angle of inclination of a line from the observer to another point
[C20: named after Sir William Abney (1843–1920), British chemist and physicist]
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Noun1.Abney level - a surveying instrument consisting of a spirit level and a sighting tubeAbney level - a surveying instrument consisting of a spirit level and a sighting tube; used to measure the angle of inclination of a line from the observer to the target
surveyor's level - surveying instrument consisting basically of a small telescope with an attached spirit level rotating around a vertical axis; for measuring relative heights of land
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References in periodicals archive ?
For years, manual measurements were taken with burden poles, measuring tapes, abney levels, transits and the blaster's best guess.
Foresters usually use Abney levels, clinometers, hypsometers, or transits to determine the height.