c of language : relaxed in tone : not suited for serious or official speech and writing. 1  He spoke to them in informal Spanish/English. 2  The term is common in informal contexts. 3  informal language/speech/writing.  an informal word.
80 Inches Of Mercury to Pounds Per Square Inch = 39.2923. 3 Inches Of Mercury to Pounds Per Square Inch = 1.4735. 90 Inches Of Mercury to Pounds Per Square Inch = 44.2039. 4 Inches Of Mercury to Pounds Per Square Inch = 1.9646.
PSI and PSIG-- Pounds per Square Inch, and Pounds per Square Inch Guage. Both are units of measure to indicate the pressure on a surface. Technically, PSI starts at zero relative to a true vacuum (such as that in space).