PSI Medical Abbreviation

Psychiatric Symptom Index

Psychological Screening Inventory

Psychological Services Index

Psychotomimeeic States Inventory

Pounds Per Square Inch

The pound per square inch or, more accurately, pound-force per square inch (abbreviations: psi, lbf/in2, lbf/in2, lbf/sq in, lbf/sq in) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.

Proteomics Standards Initiative

Psychiatric Solutions Inc

Psychiatric Solutions, Inc

Psychosocial Interventions