| psyche | (noun) that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason | Synonyms: brain, head, mind, nous |
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| (noun) the immaterial part of a person; the actuating cause of an individual life | Synonyms: soul |
| psychedelia | (noun) the subculture of users of psychedelic drugs | - |
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| psychedelic | (adjective) (of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair | - |
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| (adjective) having the vivid colors and bizarre patterns associated with psychedelic states | - |
| (adjective) producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis | - |
| psychiatric | (adjective) relating to or used in or engaged in the practice of psychiatry | Synonyms: psychiatrical |
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| psychiatrical | (adjective) relating to or used in or engaged in the practice of psychiatry | Synonyms: psychiatric |
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| psychiatrist | (noun) a physician who specializes in psychiatry | Synonyms: head-shrinker, shrink |
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| psychiatry | (noun) the branch of medicine dealing with the diagnosis and treatment of mental disorders | Synonyms: psychological medicine, psychopathology |
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| psychic | (adjective) affecting or influenced by the human mind | Synonyms: psychical |
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| (adjective) outside the sphere of physical science | Synonyms: psychical |
| (noun) a person apparently sensitive to things beyond the natural range of perception | - |
| psychical | (adjective) affecting or influenced by the human mind | Synonyms: psychic |
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| (adjective) outside the sphere of physical science | Synonyms: psychic |
| psychically | (adverb) from a psychic point of view | - |
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| psycho | (noun) a person afflicted with psychosis | Synonyms: psychotic, psychotic person |
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| psychoactive | (adjective) affecting the mind or mood or other mental processes | Synonyms: psychotropic |
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| psychoanalyse | (verb) subject to psychoanalytic treatment | Synonyms: analyse, analyze, psychoanalyze |
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| psychoanalysis | (noun) a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud | Synonyms: analysis, depth psychology |
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| psychoanalyst | (noun) a licensed practitioner of psychoanalysis | Synonyms: analyst |
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| psychoanalytic | (adjective) of or relating to or incorporating the methods and theory of psychiatric treatment originated by Sigmund Freud | Synonyms: psychoanalytical |
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| psychoanalytical | (adjective) of or relating to or incorporating the methods and theory of psychiatric treatment originated by Sigmund Freud | Synonyms: psychoanalytic |
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| psychoanalyze | (verb) subject to psychoanalytic treatment | Synonyms: analyse, analyze, psychoanalyse |
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| psychobabble | (noun) using language loaded with psychological terminology | - |
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| psychodid | (noun) a fly of the family Psychodidae | - |
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| psychodynamics | (noun) the branch of social psychology that deals with the processes and emotions that determine psychology and motivation | - |
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| (noun) the interrelation of conscious and unconscious processes and emotions that determine personality and motivation | - |
| psychogenesis | (noun) a general term for the origin and development of almost any aspect of the mind | - |
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| (noun) the development in the life of an individual of some disorder that is caused by psychological rather than physiological factors | - |
| psychogenetic | (adjective) of or relating to the origin and development of the mind | - |
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| (adjective) of or relating to the psychological cause of a disorder | Synonyms: psychogenic |
| psychogenic | (adjective) of or relating to the psychological cause of a disorder | Synonyms: psychogenetic |
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| (adjective) mental or emotional rather than physiological in origin | - |
| psychographics | (noun) market research or statistics classifying population groups according to psychological variables (as attitudes, values, or fears); also: variables or trends identified through such research. | - |
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| psychokinesis | (noun) the power to move something by thinking about it without the application of physical force | Synonyms: telekinesis |
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| psychokinetic | (adjective) moving an object without apparent use of physical means | - |
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| psycholinguist | (noun) a person (usually a psychologist but sometimes a linguist) who studies the psychological basis of human language | - |
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| psycholinguistic | (adjective) of or relating to the psychology of language | - |
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| psycholinguistics | (noun) the branch of cognitive psychology that studies the psychological basis of linguistic competence and performance | - |
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| psychological | (adjective) of or relating to or determined by psychology | - |
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| (adjective) mental or emotional as opposed to physical in nature | - |
| psychologically | (adverb) in terms of psychology | - |
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| (adverb) with regard to psychology | - |
| psychologist | (noun) a scientist trained in psychology | - |
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| psychology | (noun) the science of mental life | Synonyms: psychological science |
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| psychomachy | (noun) a conflict of the soul (as with the body or between good and evil). | - |
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| psychometric | (adjective) of or relating to psychometrics | - |
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| psychometrics | (noun) any branch of psychology concerned with psychological measurements | Synonyms: psychometrika, psychometry |
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| psychometrika | (noun) any branch of psychology concerned with psychological measurements | Synonyms: psychometrics, psychometry |
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| psychometry | (noun) any branch of psychology concerned with psychological measurements | Synonyms: psychometrics, psychometrika |
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| psychomotor | (adjective) of or relating to or characterizing mental events that have motor consequences or vice versa | - |
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| psychoneurosis | (noun) a mental or personality disturbance not attributable to any known neurological or organic dysfunction | Synonyms: neurosis, neuroticism |
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| psychoneurotic | (adjective) affected with emotional disorder | Synonyms: neurotic |
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| (noun) a person suffering from neurosis | Synonyms: mental case, neurotic |
| psychonomics | (noun) the branch of psychology that uses experimental methods to study psychological issues | Synonyms: experimental psychology |
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| psychopath | (noun) someone with a sociopathic personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath') | Synonyms: sociopath |
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| psychopathic | (adjective) suffering from an undiagnosed mental disorder | Synonyms: psychopathologic, psychopathological |
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| psychopathologic | (adjective) suffering from an undiagnosed mental disorder | Synonyms: psychopathic, psychopathological |
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| psychopathological | (adjective) suffering from an undiagnosed mental disorder | Synonyms: psychopathic, psychopathologic |
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| psychopathology | (noun) the branch of medicine dealing with the diagnosis and treatment of mental disorders | Synonyms: psychiatry, psychological medicine |
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| (noun) the branch of psychology concerned with abnormal behavior | Synonyms: abnormal psychology |
| psychopathy | (noun) any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention | Synonyms: mental disease, mental illness |
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| psychopharmacological | (adjective) of or relating to psychopharmacology | - |
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| psychopharmacology | (noun) the study of drugs that affect the mind | - |
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| psychophysicist | (noun) a psychologist trained in psychophysics | - |
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| psychophysics | (noun) the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects | - |
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| psychophysiology | (noun) the branch of psychology that is concerned with the physiological bases of psychological processes | Synonyms: neuropsychology, physiological psychology |
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| psychopomp | (noun) a conductor of souls to the afterworld | - |
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| psychosexual | (adjective) of or relating to the mental or emotional attitudes about sexuality | - |
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| psychosexuality | (noun) the mental representation of sexual activities | - |
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| psychosis | (noun) any severe mental disorder in which contact with reality is lost or highly distorted | - |
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| psychosomatic | (adjective) used of illness or symptoms resulting from neurosis | - |
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| psychosurgery | (noun) brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems | - |
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| psychotherapeutic | (adjective) of or relating to or practicing psychotherapy | - |
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| (adjective) emotionally purging | Synonyms: cathartic |
| psychotherapeutics | (noun) the branch of psychiatry concerned with psychological methods | Synonyms: mental hygiene, psychotherapy |
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| psychotherapist | (noun) a therapist who deals with mental and emotional disorders | Synonyms: clinical psychologist |
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| psychotherapy | (noun) the treatment of mental or emotional problems by psychological means | - |
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| (noun) the branch of psychiatry concerned with psychological methods | Synonyms: mental hygiene, psychotherapeutics |
| psychotic | (adjective) characteristic of or suffering from psychosis | - |
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| (noun) a person afflicted with psychosis | Synonyms: psycho, psychotic person |
| psychotropic | (adjective) affecting the mind or mood or other mental processes | Synonyms: psychoactive |
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| psychrometer | (noun) a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air | - |
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| psylla | (noun) small active cicada-like insect with hind legs adapted for leaping; feeds on plant juices | Synonyms: jumping plant louse, psyllid |
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| psyllid | (noun) small active cicada-like insect with hind legs adapted for leaping; feeds on plant juices | Synonyms: jumping plant louse, psylla |
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| psyllium | (noun) plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative | Synonyms: fleawort, Plantago psyllium, Spanish psyllium |
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| psyop | (noun) military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments | Synonyms: psychological operation |
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