P.s.i | definition of p.s.i by Medical dictionary
abbreviation for pounds per square inch.
n pounds per square inch (lb/in2); measurement describing the amount of pneumatic or hydraulic pressure in tanks and equipment used in pressurized dental procedures.
References in periodicals archive
Works like Pure'ZZA, 1996, which depicts the artist veiled in white chiffon and holding a pale lily, or CiliElegia, 1999, which shows him covered in cherries, looked as wacko as ever at P.