| psycholinguist | (noun) a person (usually a psychologist but sometimes a linguist) who studies the psychological basis of human 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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| 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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| 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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| psychoneurosis | (noun) a mental or personality disturbance not attributable to any known neurological or organic dysfunction | Synonyms: neurosis, neuroticism |
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| psychoneurotic | (noun) a person suffering from neurosis | Synonyms: mental case, neurotic |
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| 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personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath') | Synonyms: sociopath |
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| 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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| 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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| 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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| psychosurgery | (noun) brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems | - |
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| 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 | (noun) a person afflicted with psychosis | Synonyms: psycho, psychotic person |
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| scholar | (noun) a learned person; someone who by long study has gained mastery in one or more disciplines | Synonyms: bookman, scholarly person |
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| (noun) someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs | Synonyms: assimilator, learner, student |
| (noun) a student who holds a scholarship | - |
| scholarship | (noun) profound scholarly knowledge | Synonyms: encyclopaedism, encyclopedism, eruditeness, erudition, learnedness, learning |
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| (noun) financial aid provided to a student on the basis of academic merit | - |
| scholastic | (noun) a person who pays more attention to formal rules and book learning than they merit | Synonyms: bookworm, pedant |
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| scholasticism | (noun) orthodoxy of a scholastic variety | Synonyms: academicism, academism |
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| scholia | (noun) a marginal note written by a scholiast (a commentator on ancient or classical literature) | Synonyms: scholium |
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| scholiast | (noun) a scholar who writes explanatory notes on an author (especially an ancient commentator on a classical author) | - |
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| scholium | (noun) a marginal note written by a scholiast (a commentator on ancient or classical literature) | Synonyms: scholia |
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| school | (noun) a building where young people receive education | Synonyms: schoolhouse |
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| (noun) the process of being formally educated at a school | Synonyms: schooling |
| (noun) an educational institution | - |
| (noun) a large group of fish | Synonyms: shoal |
| (noun) a body of creative artists or writers or thinkers linked by a similar style or by similar teachers | - |
| (noun) an educational institution's faculty and students | - |
| (noun) the period of instruction in a school; the time period when school is in session | Synonyms: school day, schooltime |
| schoolbag | (noun) a bag for carrying school books and supplies | - |
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| schoolbook | (noun) a book prepared for use in schools or colleges | Synonyms: school text, text, text edition, textbook |
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| schoolboy | (noun) a boy attending school | - |
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| schoolchild | (noun) a young person attending school (up through senior high school) | Synonyms: pupil, school-age child |
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| schooldays | (noun) the time of life when you are going to school | Synonyms: schooltime |
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| schoolfellow | (noun) an acquaintance that you go to school with | Synonyms: class fellow, classmate, schoolmate |
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| schoolfriend | (noun) a friend who attends the same school | - |
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| schoolgirl | (noun) a girl attending school | - |
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| schoolhouse | (noun) a building where young people receive education | Synonyms: school |
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| schooling | (noun) the act of teaching at school | - |
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| (noun) the training of an animal (especially the training of a horse for dressage) | - |
| (noun) the process of being formally educated at a school | Synonyms: school |
| schoolman | (noun) a scholar who is skilled in academic disputation | Synonyms: academician |
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| schoolmarm | (noun) a woman schoolteacher (especially one regarded as strict) | Synonyms: mistress, schoolma'am, schoolmistress |
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| schoolmaster | (noun) food fish of warm Caribbean and Atlantic waters | Synonyms: Lutjanus apodus |
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| (noun) presiding officer of a school | Synonyms: headmaster, master |
| (noun) any person (or institution) who acts as an educator | - |
| schoolmate | (noun) an acquaintance that you go to school with | Synonyms: class fellow, classmate, schoolfellow |
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| schoolmistress | (noun) a woman schoolteacher (especially one regarded as strict) | Synonyms: mistress, schoolma'am, schoolmarm |
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| schoolroom | (noun) a room in a school where lessons take place | Synonyms: classroom |
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| schoolteacher | (noun) a teacher in a school below the college level | Synonyms: school teacher |
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| schooltime | (noun) the period of instruction in a school; the time period when school is in session | Synonyms: school, school day |
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| (noun) the time of life when you are going to school | Synonyms: schooldays |
| schoolwork | (noun) work, such as schoolwork or piecework, that is done at home | Synonyms: homework, school assignment |
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| schoolyard | (noun) the yard associated with a school | - |
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| schooner | (noun) sailing vessel used in former times | - |
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| (noun) a large beer glass | - |
| schorl | (noun) black tourmaline | - |
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| schottische | (noun) a German round dance resembling a slow polka | - |
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| (noun) music performed for dancing the schottische | - |
| soochong | (noun) a fine quality of black tea native to China | Synonyms: souchong |
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| souchong | (noun) a fine quality of black tea native to China | Synonyms: soochong |
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| sporotrichosis | (noun) a chronic fungal infection of the skin and lymph nodes | - |
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| succinylcholine | (noun) a muscle relaxant for striated muscle that is used as an adjunct to anesthesia during certain surgical procedures | - |
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| sunchoke | (noun) sunflower tuber eaten raw or boiled or sliced thin and fried as Saratoga chips | Synonyms: Jerusalem artichoke |
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| tachogram | (noun) a graphical record of speed and distance produced by a tachograph | - |
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| tachograph | (noun) a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle | - |
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| tachometer | (noun) measuring instrument for indicating speed of rotation | Synonyms: tach |
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| tchotchke | (noun) (Yiddish) an inexpensive showy trinket | Synonyms: chachka, tsatske, tshatshke |
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| (noun) (Yiddish) an attractive, unconventional woman | Synonyms: chachka, tchotchkeleh, tsatske, tshatshke |
| tchotchkeleh | (noun) (Yiddish) an attractive, unconventional woman | Synonyms: chachka, tchotchke, tsatske, tshatshke |
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| terpsichore | (noun) taking a series of rhythmical steps (and movements) in time to music | Synonyms: dance, dancing, saltation |
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| terpsichorean | (noun) a performer who dances professionally | Synonyms: dancer, professional dancer |
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| tichodrome | (noun) crimson-and-grey songbird that inhabits town walls and mountain cliffs of southern Eurasia and northern Africa | Synonyms: Tichodroma muriaria, wall creeper |
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| trachodon | (noun) large duck-billed dinosaur of the Cretaceous period | Synonyms: trachodont |
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| trachodont | (noun) large duck-billed dinosaur of the Cretaceous period | Synonyms: trachodon |
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| trachoma | (noun) a chronic contagious disease caused by a bacterium and marked by inflammation of the conjunctiva and cornea of the eye and the formation of scar tissue | - |
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| trichobezoar | (noun) a compact mass of hair that forms in the alimentary canal (especially in the stomach of animals as a result of licking fur) | Synonyms: hair ball, hairball |
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| trichodesmium | (noun) large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation | - |
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| trichomonad | (noun) cause of trichomoniasis in women and cattle and birds | - |
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| trichomoniasis | (noun) infection of the vagina | - |
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| trichopteran | (noun) caddis fly | Synonyms: trichopteron, trichopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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| trichotillomania | (noun) an irresistible urge to pull out your own hair | - |
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| trichotomy | (noun) being threefold; a classification into three parts or subclasses | - |
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| urochord | (noun) a notochord of a larval tunicate typically confined to the caudal region | - |
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| (noun) primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva | Synonyms: tunicate, urochordate |
| urochordate | (noun) primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva | Synonyms: tunicate, urochord |
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