millibar

[mil-uh-bahr]

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

millibar

/ 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

millibar

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.

Word History and Origins

Origin of millibar¹

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

Example Sentences

The phrase is taken from the US term "bombogenesis" used to described a fall of at least 24 millibars of pressure in 24 hours.

Read more on BBC

“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.

Read more on Los Angeles Times

The actual highest drop in pressure seen in this storm easily surpassed that benchmark — falling by 22 millibars over 24 hours, Behringer said.

Read more on Los Angeles Times

In the Bay Area, the benchmark is 17 millibars.

Read more on Los Angeles Times

In a process called explosive cyclogenesis, the low pressure system will deepen by over 24 millibars in 24 hours.

Read more on BBC