Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun abney_level

1 sense of abney level

Sense 1
Abney 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)