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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site atmospheric pressure The pressure of air at sea level. One standard atmosphere at 0°C equals 1013.25 millibars, or 1.033 kilograms per square centimeter (14.695 pounds per square inch). Related category    • UNITS Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP