A life vest or other device or article of clothing designed to be used by one person as an aid to remaining safely afloat in water, especially in a emergency situation.

plural of personal water craft

plural of borderline personality disorder

(psychology) A personality disorder marked by antisocial behavior, a pervasive pattern of disregard for and violation of the rights of others that begins in childhood or early adolescence and continues into adulthood.

(psychiatry) A personality disorder characterized largely by an overinflated sense of self-importance typically caused by unbalanced parental valuation during childhood.

(psychology) A personality disorder characterized largely by exaggerated emotions, and inappropriate attention-seeking and seductive behavior typically caused by undue amounts of trauma and related stress during childhood.

plural of absolute personal equation

The difference between an observed value and a standard value assumed as true.

Alternative form of personal defense weapon

plural of personal defense weapon