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( Bar (unit))
The bar (symbol bar), decibar (symbol dbar) and the millibar (symbol mbar, also mb) are units of pressure. They are not SI units, nor are they cgs units, but they are accepted for use with the SI. The bar is widely used in descriptions of pressure because it is about the same as atmospheric pressure, and is legally recognized in countries of the European Union.[1] The bar, decibar and millibar are defined as (A pascal is one newton per square meter.) The word bar has its origin in the Greek word ß???? (baros), meaning weight. Its official symbol is "bar"; the earlier "b" is now deprecated, but still often seen especially in "mb" rather than the proper "mbar" for millibars.
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