Bible Dictionaries
Vacuometer
Webster's Dictionary
(1):
(n.) An instrument for the comparison of barometers.
(2):
(n.) An apparatus for the measurement of low pressures.
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Bibliography Information
Webster, Noah. Entry for 'Vacuometer'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/v/vacuometer.html. 1828.