millibar

American  

[mil-uh-bahr] / ˈmɪl əˌbɑr /

noun

1. 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. mb

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millibar British  

/ ˈmɪlɪˌbɑː /

noun

1. a cgs unit of atmospheric pressure equal to 10 ^–3 bar, 100 newtons per square metre or 0.7500617 millimetre of mercury

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millibar Scientific  

/ mĭl′ə-bär′ /

1. 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.

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Etymology

Origin of millibar

First recorded in 1905–10; milli- + bar ³

Example Sentences

“And so we have to go from talking about ‘500 millibar geopotential heights’ that a really small audience appreciates and understands, to something that captures the essence of the event.

From Los Angeles Times • Jun. 5, 2024

One way to gauge the magnitude of a heat dome is to measure the height of the typical halfway point of the lower atmosphere — at the 500 millibar pressure level.

From Washington Post • Jul. 10, 2021

A millibar is the measurement of atmospheric pressure, according to the National Oceanic and Atmospheric Administration.

From Fox News • Mar. 13, 2019

But if you want the actual definition it refers to a 24 millibar fall in pressure over a 24-hour period.

From BBC • Feb. 27, 2018

Over the course of the mission, the vacuum would gradually rise by a factor of 10,000, to about a thousandth of a millibar, because of gases released within the instrument.

From New York Times • Dec. 22, 2015