Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
The pressure exerted by air. At sea level it is 14.7 pounds per square inch or 1.0355 kilograms per square centimetre. This base pressure is referred to as an atmospheric pressure of 1, or as 1 atmosphere.