An old unit of pressure equal to one dyne per square centimeter, named after the Greek word for weight.
From French 'barye,' derived from Greek 'barys' (heavy). Created in the 19th century as scientists standardized measurement units for pressure in the CGS (centimeter-gram-second) system.
The barye is so tiny that atmospheric pressure is about 1 million baryes—it's almost never used today, but it lives on in the millibar (mbar), which meteorologists use to measure weather systems!
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