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Definition of Mm hg

Mm hg Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

mm hg
n : a unit of pressure equal to 0.001316 atmosphere; named after torricelli [syn: torr, millimeter of mercury, mm hg]

WordNet 2.0

1. a unit of pressure equal to 0.001316 atmosphere; named after Torricelli
(synonym) torr, millimeter of mercury
(hypernym) pressure unit
Mm hg Definition from Science & Technology Dictionaries & Glossaries
General Chemistry Glossary
Compare with barometer and pressure .A unit of pressure , defined so that 760 Torr is exactly 1 atmosphere . A Torr is equivalent to 1 mm Hg on barometer readings taken at 0°C; at other temperatures, the conversion from mm Hg to Torr is approximately p(Torr) = p(mm Hg) × (1 - 1.8×10-4t), where t is in °C.
Rubber Glossary
Millimeters of Mercury. In vacuum work, a measure of absolute pressure, being the height of a column of Mercury that the air or other gas will support. Standard atmospheric pressure will support a Mercury column 760 millimeters high. Any value less than that represents some degree of vacuum.
Mm hg Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
A millimeter of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high. It is now defined precisely as 13.5951 × 9.80665 = 133.322387415 pascals. It is denoted by the symbol "mm Hg".

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The torr (symbol: Torr) is a traditional unit of pressure, now defined as exactly of a standard atmosphere. Thus one torr is exactly  pascals (~133.3 Pa).

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Mm hg Definition from Medicine Dictionaries & Glossaries
High Blood Pressure
Abbreviation for millimeters of mercury. It is used to express measures of blood pressure. It refers to the height to which the pressure in your blood vessels would push a column of mercury.
Labtests Abbreviations KÖRFEZLAB
millimeters of mercury