from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A barometer for recording small variations in atmospheric pressure.
- n. A device for indicating small changes in the altitude of an airplane.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An instrument used for indicating or recording small changes in barometric pressure or in the altitude of an aircraft.
from The Century Dictionary and Cyclopedia
- n. A form of aneroid barometer for registering minute variations of atmospheric pressure.
Sorry, no etymologies found.