The story
From the surname of English scientist William de Wiveleslie Abney.
First known use, by meaning
- First attested in the late 19ᵗʰ century. A clinometer used to measure tree heights.
Etymology from Wiktionary, CC BY-SA 4.0.
Abney level
Today it means: A clinometer used to measure tree heights. Full definition →
First used First attested in the late 19ᵗʰ century.