n. (Med.), A mental disorder characterized by alternating episodes of mania and depression.
Syn. -- bipolar disorder, manic depression, manic depressive illness. [ WordNet 1.5 ]

v. t. [ imp. & p. p. Metempsychosed p. pr. & vb. n. Metempsychosing ] [ See Metempsychosis. ] To translate or transfer, as the soul, from one body to another. [ R. ] Peacham. [ 1913 Webster ]

n. [ NL., fr. Gr. &unr_;; &unr_; beyond, over + &unr_; to animate; &unr_; in + &unr_; soul. See Psychology. ] The passage of the soul, as an immortal essence, at the death of the animal body it had inhabited, into another living body, whether of a brute or a human being; transmigration of souls. Sir T. Browne. [ 1913 Webster ]

n. the branch of psychology that is concerned with the physiological bases of psychological processes.
Syn. -- physiological psychology, psychophysiology. [ WordNet 1.5 ]

adj. Of or pertaining to parapsychology; pertaining to forces or mental processes outside the possibilities defined by natural or scientific laws; as, parapsychological research.
Syn. -- psychic, psychical, parapsycholological, paranormal. [ WordNet 1.5 ]

n. One who studies or is versed in parapsychology. [ PJC ]

n. The field of study concerned with psychological phenomena not explainable by the laws of physics, especially extrasensory perception, telepathy, psychokinesis, precognition, and clairvoyance. The field is controversial, most scientists holding the opinion that the supposed phenomena observed result from poor experimental design, or are mere statistical artifacts or in some cases deliberate fraud. [ PJC ]

A combining form from Gr. psychh` the soul, the mind, the understanding; as, psychology. [ 1913 Webster ]

v. t. To investigate or subject to treatment by psychoanalysis.
Syn. -- analyze, analyse, psychoanalyze. [ WordNet 1.5 ]

n. 1. A method or process of psychotherapeutic analysis and treatment pf psychoneuroses, based on the work of Dr. Sigmund Freud (1856- 1939) of Vienna. The method rests upon the theory that neurosis is characteristically due to repression of desires consciously rejected but subconsciously persistent; it consists in a close analysis of the patient's mental history, effort being made to bring unconsciuos and preconscious material to consciousness; the methods include analysis of transferance and resistance. In some variants, stress is laid upon the dream life, and of treatment by means of suggestion. [ Webster 1913 Suppl. +PJC ]

2. The theory of human psychology which is the foundation for the psychoanalytic therapy, which explores the relation between conscious and unconscious mental processes in motivating human behavior and causing neuroses. [ PJC ]

3. An integrated set of theories of human personality development, motivation, and behavior based on a body of observations. [ Stedman ] [ PJC ]

4. One of several schools of psychotherapy, such as jungian psychoanalysis or freudian psychoanalysis. [ Stedman ] [ PJC ]

-- Psy`cho*an`a*lyt"ic, a.; Psych`o*an"al*ist n., etc. [ Webster 1913 Suppl. ]

v. t. To investigate or subject to treatment by psychoanalysis.
Syn. -- analyze, analyse, psychoanalyse. [ WordNet 1.5 ]

n. Genesis through an internal force, as opposed to natural selection. [ 1913 Webster ]

n. [ Psycho- + -graphy. ] 1. A description of the phenomena of mind. [ 1913 Webster ]

2. (Spiritualism) Spirit writing. [ 1913 Webster ]

{ } a. [ Cf. F. psychologique. ] Of or pertaining to psychology. See Note under Psychic. -- Psy`cho*log"ic*al*ly, adv. [1913 Webster]

n. [ Cf. F. psychologiste. ] One who is versed in, devoted to, psychology. [ 1913 Webster ]

n. A psychologist. [ 1913 Webster ]

n. pl. Psychologies [ Psycho- + -logy: cf. F. psychologie. See Psychical. ] The science of the human soul; specifically, the systematic or scientific knowledge of the powers and functions of the human soul, so far as they are known by consciousness; a treatise on the human soul. [ 1913 Webster ]

Psychology, the science conversant about the phenomena of the mind, or conscious subject, or self. Sir W. Hamilton. [ 1913 Webster ]

n. [ L. psychomachia, fr. Gr. psychh` the soul + &unr_; fight: cf. &unr_; desperate fighting. ] A conflict of the soul with the body. [ 1913 Webster ]

n. [ Psycho- + -mancy: cf. F. psychomancie. ] Necromancy. [ 1913 Webster ]

n. [ Psycho- + -metry. ] (Physiol.) The art of measuring the duration of mental processes, or of determining the time relations of mental phenomena. -- Psy`cho*met"ric a. [1913 Webster]

a. [ Psycho- + motor. ] Of or pertaining to movement produced by action of the mind or will. [ 1913 Webster ]

n. [ Psycho- + Gr. &unr_; to spend all night long; pa^s, pa^n, all + &unr_; night. ] (Theol.) The doctrine that the soul falls asleep at death, and does not wake until the resurrection of the body. -- Psy`cho*pan"ny*chism n. [1913 Webster]

n. [ Psycho- + Gr. &unr_;, &unr_;. ] (Med.) Mental disease. See Psychosis, 2. -- Psy`cho*path"ic, a. -- Psy*chop"a*thist, n. [ 1913 Webster ]

a. Of or pertaining to psychophysics; involving the action or mutual relations of the psychical and physical in man. [ 1913 Webster ]

Psychophysical time (Physiol.), the time required for the mind to transform a sensory impression into a motor impulse. It is an important part of physiological or reaction time. See under Reaction. [ 1913 Webster ]

n. [ Psycho- + physics. ] The science of the connection between nerve action and consciousness; the science which treats of the relations of the psychical and physical in their conjoint operation in man; the doctrine of the relation of function or dependence between body and soul. [ 1913 Webster ]

n. [ Gr. &unr_;; psychh` the soul + &unr_; to send: cf. F. psychopompe. ] (Myth.) A leader or guide of souls . J. Fiske. [ 1913 Webster ]

n. [ NL. See Psycho-. ] [ 1913 Webster ]

1. Any vital action or activity. Mivart. [ 1913 Webster ]

2. (Med.) A disease of the mind; especially, a functional mental disorder, that is, one unattended with evident organic changes. [ 1913 Webster ]

n. [ Psycho- + therapeutics. ] (Med.) The treatment of disease by acting on the mind, as by suggestion; mind cure; psychotherapy. [ Webster 1913 Suppl. ]

n. [ Psycho- + therapy. ] (Med.) Psychotherapeutics. [ Webster 1913 Suppl. ]

a. [ Psycho- + Gr. &unr_; life. ] (Geol.) Designating, or applied to the Era of man; as, the psychozoic era. [ 1913 Webster ]

n. [ Zoo- + psychology. ] Animal psychology. [ 1913 Webster ]