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Definition of Millibar
1. Noun. A unit of atmospheric pressure equal to one thousandth of a bar. "Atmospheric pressure at sea level is 1013 millibars"
Definition of Millibar
1. a unit of atmospheric pressure [n -S]
Medical Definition of Millibar
1. One-thousandth of a bar; 100 newtons/sq m; 0.75006 mm Hg; standard atmospheric pressure is 1013 millibars. (05 Mar 2000)