from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An instrument used to measure small vertical distances
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument for the accurate measurement of small differences of height; esp. of the differences in the height of the upper surfaces of two columns of mercury or other fluid, or of the same column at different times. It consists of a telescopic leveling apparatus (d), which slides up or down a perpendicular metallic standard very finely graduated (bb). The telescope is raised or depressed in order to sight the objects or surfaces, and the differences in vertical height are thus shown on the graduated standard.
from The Century Dictionary and Cyclopedia
- n. An instrument for measuring small differences of level between two near points, as, for example, the distance between the levels of the mercury in the cistern and in the tube of a barometer.
Sorry, no etymologies found.