foot level

noun

a foot rule, hinged in the middle, having a spirit level in one section and a graduated arc from which the angle made by the two sections can be read.

Origin of foot level

First recorded in 1720–30

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

He was working that day on the one-hundred-and-ten-foot level; he was an experienced man and counted sure of foot.
Careers of Danger and Daring | Cleveland Moffett
The superintendent was at the time on the twenty-four hundred-foot level.
The Comstock Club | Charles Carroll Goodwin
The Atlantis was spiralling up to her ten-thousand-foot level, and in a moment or two she was nothing more than a speck.
The Air Pirate | Cyril Arthur Edward Ranger Gull
"Yes, we have descended to the twenty-five hundred foot level," remarked the Professor, after consulting the barometer.
Doctor Jones' Picnic | S. E. Chapman
They had lowered to the five hundred foot level, so that a good view might be taken of the beautiful metropolis of Ohio—Cleveland.
Doctor Jones' Picnic | S. E. Chapman

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