Millibar
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A millibar (mb) is 1/1000th of a bar, a unit for measurement of pressure. It is not an SI unit of measure, however it is one of the units used in meteorology when describing atmospheric pressure. The SI unit is the pascal (Pa), with 1 millibar = 100 pascals (a hectopascal)
The millibar unit was introduced by Sir Napier Shaw in 1909, and internationally adopted in 1929.
Unicode has a symbol for "mb": (㏔).pl:Milibar