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Bar

Bar (from the Greek baros — weight) (bar).
1) a unit of pressure outside any system of units; 1 bar = 105 Pa = 106 dyn/cm2 = 0.986923 atm; 1 mbar=103 dyn/cm2=0.986923•10-3 atm = 0.75 mm Hg.
2) An obsolete name for the unit of pressure in the CGS system of units. 1 bar = 1 dyn/cm2.