Lōw'-prĕss'ūre, a.

a. Having, employing, or exerting a low degree of pressure; especially, in a restricted sense, employing or exerting a pressure of less than fifty pounds to the square inch;—said of steam and steam-engines.

Low-pressure steam-engine, a steam-engine in which low steam is used, and which is generally condensing. See STEAM-ENGINE.