51Թ

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Abney level

[ab-nee]

noun

Surveying.

  1. a hand level for determining elevations and angles of slope.

Abney level

/ ˈæɪ /

noun

  1. 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

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51Թ History and Origins

Origin of Abney level1

C20: named after Sir William Abney (1843–1920), British chemist and physicist

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