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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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For years, manual measurements were taken with burden poles, measuring tapes, abney levels, transits and the blaster's best guess.
Abney levels are hand-held levels, but they are more sophisticated than hand levels.
Foresters usually use Abney levels, clinometers, hypsometers, or transits to determine the height.