vacuum gauge

noun

1. a device for measuring pressures below atmospheric pressure in the receiver of an air pump, in steam condensers, and the like.

vacuum gauge

noun

1. any of a number of instruments for measuring pressures below atmospheric pressure

Word History and Origins

Origin of vacuum gauge¹

First recorded in 1860–65

Example Sentences

Obviously, therefore, the zero of the dial vacuum gauge is atmospheric pressure.

From Project Gutenberg