millibar

[mil-uh-bahr]
noun
a centimeter-gram-second unit of pressure equal to one thousandth of a bar or 1000 dynes per square centimeter, used to measure air pressure. Abbreviation: mb

Origin:
1905–10; milli- + bar3

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Collins
World English Dictionary
millibar (ˈmɪlɪˌbɑː)
 
n
a cgs unit of atmospheric pressure equal to 10--3 bar, 100 newtons per square metre or 0.7500617 millimetre of mercury

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
millibar   (mĭl'ə-bär')  Pronunciation Key 
A unit of pressure equal to 0.001 bars. It is equivalent to 100 newtons per square meter, or 0.0145 pounds per square inch. Standard atmospheric pressure at sea level is 1,013.2 millibars.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

millibar

unit of air pressure in the metric system, commonly used in meteorology, equal to 100 pascals, 1,000 dynes per square cm (about 0.0145 pounds per square inch), or slightly less than one-thousandth of a standard atmosphere

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
We missed setting a record by two tenths of a millibar.
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