Possession.—A developed form of motor automatism, in which the automatist's own personality disappears for a time, while there appears to be a more or less complete substitution of personality, writing or speech being given by another spirit through the entranced organism.
Post-hypnotic.—Used of a suggestion given during the hypnotic trance, but intended to operate after that trance has ceased.
Precognition.—Knowledge of impending events supernormally acquired.
Premonition.—A supernormal indication of any kind of event still in the future.
*Preversion.—A tendency to characteristics assumed to lie at a further point of the evolutionary progress of a species than has yet been reached; opposed to reversion.
*Promnesia.—The paradoxical sensation of recollecting a scene which is only now occurring for the first time; the sense of the déjà vu.
*Psychorrhagy.—A special idiosyncrasy which tends to make the phantasm of a person easily perceptible; the breaking loose of a psychical element, definable mainly by its power of producing a phantasm, perceptible by one or more persons, in some portion of space.
*Psychorrhagic diathesis.—A habit or capacity of detaching some psychical element, involuntarily and without purpose, in such a manner as to produce a phantasm.
Psycho-therapeutics.—"Treatment of disease by the influence of the mind on the body." (Tuke's Dict.)