| acathexia | (noun) an inability to retain bodily secretions | - |
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| acathexis | (noun) (psychoanalysis) a lack of cathexis; a condition in which significant objects or memories arouse no emotion in an individual | - |
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| adnexa | (noun) accessory or adjoining anatomical parts or appendages to an organ (especially of the embryo) | Synonyms: annexa |
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| aldohexose | (noun) a monosaccharide sugar having six carbon atoms and an aldehyde group | - |
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| alexandrite | (noun) a green variety of chrysoberyl used as a gemstone | - |
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| alexia | (noun) inability to perceive written words | Synonyms: visual aphasia, word blindness |
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| alexic | (noun) a person with alexia | - |
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| ambidexterity | (noun) the property of being equally skillful with each hand | Synonyms: ambidextrousness |
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| ambidextrousness | (noun) the property of being equally skillful with each hand | Synonyms: ambidexterity |
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| annex | (noun) an addition that extends a main building | Synonyms: annexe, extension, wing |
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| annexa | (noun) accessory or adjoining anatomical parts or appendages to an organ (especially of the embryo) | Synonyms: adnexa |
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| annexation | (noun) the formal act of acquiring something (especially territory) by conquest or occupation | - |
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| (noun) incorporation by joining or uniting | Synonyms: appropriation |
| annexe | (noun) an addition that extends a main building | Synonyms: annex, extension, wing |
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| anorexia | (noun) a prolonged disorder of eating due to loss of appetite | - |
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| anorexic | (noun) a person suffering from anorexia nervosa | Synonyms: anorectic |
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| antapex | (noun) the point opposite in direction from the solar apex; the point the solar system is moving away from | - |
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| apex | (noun) the highest point (of something) | Synonyms: acme, peak, vertex |
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| (noun) the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars | Synonyms: apex of the sun's way, solar apex |
| apoplexy | (noun) a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain | Synonyms: cerebrovascular accident, CVA, stroke |
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| areflexia | (noun) absence of a reflex; a sign of possible nerve damage | - |
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| asexuality | (noun) having no evident sex or sex organs | Synonyms: sexlessness |
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| auspex | (noun) (ancient Rome) a religious official who interpreted omens to guide public policy | Synonyms: augur |
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| autosexing | (noun) (especially of domestic fowl) breeding to reveal differential sex characteristics at hatching | - |
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| bisexual | (noun) a person who is sexually attracted to both sexes | Synonyms: bisexual person |
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| bisexuality | (noun) sexual activity with both men and women | - |
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| (noun) showing characteristics of both sexes | Synonyms: androgyny, hermaphroditism |
| bulimarexia | (noun) a disorder of eating in which the person alternates between strong craving for food and aversion to food; characterized by excessive eating followed by periods of fasting or self-induced vomiting | Synonyms: binge-purge syndrome, binge-vomit syndrome, bulimia nervosa |
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| cachexia | (noun) any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease | Synonyms: cachexy, wasting |
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| cachexy | (noun) any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease | Synonyms: cachexia, wasting |
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| catalexis | (noun) the absence of a syllable in the last foot of a line or verse | - |
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| cathexis | (noun) (psychoanalysis) the libidinal energy invested in some idea or person or object | Synonyms: charge |
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| caudex | (noun) woody stem of palms and tree ferns | - |
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| (noun) persistent thickened stem of a herbaceous perennial plant | Synonyms: stock |
| centrex | (noun) (CENTRal EXchange) a kind of telephone exchange | - |
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| cephalexin | (noun) a cephalosporin antibiotic (trade names Keflex and Keflin and Keftab) commonly prescribed for mild to moderately severe infections of the skin or ears or throat or lungs or urinary tract | Synonyms: Keflex, Keflin, Keftab |
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| chlorhexidine | (noun) a long-lasting liquid antiseptic; used by surgeons to wash their hands before performing surgery | - |
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| circumflex | (noun) a diacritical mark (^) placed above a vowel in some languages to indicate a special phonetic quality | - |
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| codex | (noun) an unbound manuscript of some ancient classic (as distinguished from a scroll) | Synonyms: leaf-book |
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| (noun) an official list of chemicals or medicines etc. | - |
| coexistence | (noun) existing peacefully together | - |
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| coextension | (noun) equality of extension or duration | - |
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| complex | (noun) a whole structure (as a building) made up of interconnected or related structures | Synonyms: building complex |
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| (noun) a conceptual whole made up of complicated and related parts | Synonyms: composite |
| (noun) (psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior | - |
| (noun) a compound described in terms of the central atom to which other atoms are bound or coordinated | Synonyms: coordination compound |
| complexifier | (noun) someone makes things complex | - |
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| complexion | (noun) the coloring of a person's face | Synonyms: skin color, skin colour |
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| (noun) (obsolete) a combination of elements (of dryness and warmth or of the four humors) that was once believed to determine a person's health and temperament | - |
| (noun) texture and appearance of the skin of the face | - |
| (noun) a point of view or general attitude or inclination | - |
| (noun) a combination that results from coupling or interlinking | - |
| complexity | (noun) the quality of being intricate and compounded | Synonyms: complexness |
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| complexness | (noun) the quality of being intricate and compounded | Synonyms: complexity |
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| connexion | (noun) the act of bringing two things into contact (especially for communication) | Synonyms: connection, joining |
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| (noun) shifting from one form of transportation to another | Synonyms: connection |
| (noun) an instrumentality that connects | Synonyms: connecter, connection, connective, connector |
| (noun) the process of bringing ideas or events together in memory or imagination | Synonyms: association, connection |
| (noun) a relation between things or events (as in the case of one causing the other or sharing features with it) | Synonyms: connectedness, connection |
| (noun) a connecting shape | Synonyms: connection, link |
| context | (noun) discourse that surrounds a language unit and helps to determine its interpretation | Synonyms: context of use, linguistic context |
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| (noun) the set of facts or circumstances that surround a situation or event | Synonyms: circumstance, setting |
| contextualism | (noun) any doctrine emphasizing the importance of the context in solving problems or establishing the meaning of terms | - |
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| convexity | (noun) the property possessed by a convex shape | Synonyms: convexness |
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| (noun) a shape that curves or bulges outward | Synonyms: convex shape |
| convexness | (noun) the property possessed by a convex shape | Synonyms: convexity |
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| cortex | (noun) the tissue forming the outer layer of an organ or structure in plant or animal | - |
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| (noun) the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum | Synonyms: cerebral cortex, cerebral mantle, pallium |
| (noun) the tissue that surrounds the lens nucleus | Synonyms: lens cortex |
| counterexample | (noun) refutation by example | - |
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| cybersex | (noun) sexual arousal involving communication on the internet | - |
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| cyclohexanol | (noun) a colorless oily alcohol that smells like camphor | - |
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| deflexion | (noun) a turning aside (of your course or attention or concern) | Synonyms: deflection, deviation, digression, divagation, diversion |
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| (noun) the property of being bent or deflected | Synonyms: bending, deflection |
| (noun) the amount by which a propagating wave is bent | Synonyms: deflection, refraction |
| (noun) the movement of the pointer or pen of a measuring instrument from its zero position | Synonyms: deflection |
| dexamethasone | (noun) a corticosteroid drug (trade names Decadron or Dexamethasone Intensol or Dexone or Hexadrol or Oradexon) used to treat allergies or inflammation | Synonyms: Decadron, Dexamethasone Intensol, Dexone, Hexadrol, Oradexon |
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| dexterity | (noun) adroitness in using the hands | Synonyms: manual dexterity, sleight |
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| dextrality | (noun) preference for using the right hand | Synonyms: right-handedness |
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| dextrin | (noun) any of various polysaccharides obtained by hydrolysis of starch; a tasteless and odorless gummy substance that is used as a thickening agent and in adhesives and in dietary supplements | - |
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| dextrocardia | (noun) abnormal condition where the heart is located toward the right side of the chest | - |
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| dextroglucose | (noun) an isomer of glucose that is found in honey and sweet fruits | Synonyms: dextrose, grape sugar |
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| dextrorotation | (noun) rotation to the right | Synonyms: clockwise rotation |
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| dextrose | (noun) an isomer of glucose that is found in honey and sweet fruits | Synonyms: dextroglucose, grape sugar |
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| dorsiflexion | (noun) the act of bending backward (of the body or a body part) | - |
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| duplex | (noun) an apartment having rooms on two floors that are connected by a staircase | Synonyms: duplex apartment |
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| (noun) a house with two units sharing a common wall | Synonyms: duplex house, semidetached house |
| dyslexia | (noun) impaired ability to learn to read | - |
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| dyslexic | (noun) a person who has dyslexia | Synonyms: dyslectic |
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| epiplexis | (noun) a rhetorical device in which the speaker reproaches the audience in order to incite or convince them | - |
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| ex | (noun) the 24th letter of the Roman alphabet | Synonyms: X, x |
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| (noun) a woman who was formerly a particular man's wife | Synonyms: ex-wife |
| (noun) a man who was formerly a certain woman's husband | Synonyms: ex-husband |
| exabit | (noun) a unit of information equal to 1000 petabits or 10^18 bits | Synonyms: Eb, Ebit |
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| exabyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exbibyte |
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| (noun) a unit of information equal to 1000 petabytes or 10^18 bytes | Synonyms: EB |
| exacerbation | (noun) violent and bitter exasperation | - |
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| (noun) action that makes a problem or a disease (or its symptoms) worse | Synonyms: aggravation |
| exacta | (noun) a bet that you can pick the first and second finishers in the right order | Synonyms: perfecta |
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| exactingness | (noun) the quality or state of being demanding or unyielding. | - |
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| exaction | (noun) act of demanding or levying by force or authority | - |
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| exactitude | (noun) the quality of being exact | Synonyms: exactness |
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| exactness | (noun) the quality of being exact | Synonyms: exactitude |
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| exaflop | (noun) (computer science) a unit for measuring the speed of a computer system, equal to one quintillion floating-point operations a second. | Synonyms: EFLOPS |
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| exaggeration | (noun) the act of making something more noticeable than usual | - |
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| (noun) making to seem more important than it really is | Synonyms: magnification, overstatement |
| (noun) extravagant exaggeration | Synonyms: hyperbole |
| exaltation | (noun) the elevation of a person (as to the status of a god) | Synonyms: apotheosis, deification |
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| (noun) a flock of larks (especially a flock of larks in flight overhead) | - |
| (noun) the location of a planet in the zodiac at which it is believed to exert its maximum influence | - |
| (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, rapture, raptus, transport |
| exaltolide | (noun) the macrocyclic lactone having fifteen carbon atoms; it has a musky scent, similar to exaltone. | - |
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| exam | (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: examination, test |
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| examen | (noun) a detailed inspection of your conscience (as done daily by Jesuits) | Synonyms: examination |
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| (noun) a critical study (as of a writer's work) | - |
| examination | (noun) the act of examining something closely (as for mistakes) | Synonyms: scrutiny |
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| (noun) the act of giving students or candidates a test (as by questions) to determine what they know or have learned | Synonyms: testing |
| (noun) a detailed inspection of your conscience (as done daily by Jesuits) | Synonyms: examen |
| (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: exam, test |
| (noun) formal systematic questioning | Synonyms: interrogation, interrogatory |
| examinee | (noun) someone who is tested (as by an intelligence test or an academic examination) | Synonyms: testee |
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| examiner | (noun) an investigator who observes carefully | Synonyms: inspector |
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| (noun) someone who administers a test to determine your qualifications | Synonyms: quizzer, tester |
| example | (noun) a task performed or problem solved in order to develop skill or understanding | Synonyms: exercise |
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| (noun) an item of information that is typical of a class or group | Synonyms: illustration, instance, representative |
| (noun) something to be imitated | Synonyms: exemplar, good example, model |
| (noun) a representative form or pattern | Synonyms: model |
| (noun) punishment intended as a warning to others | Synonyms: deterrent example, lesson, object lesson |
| (noun) an occurrence of something | Synonyms: case, instance |
| exanthem | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthema, skin eruption |
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| exanthema | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthem, skin eruption |
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| exarch | (noun) a viceroy who governed a large province in the Roman Empire | - |
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| (noun) a bishop in eastern Christendom who holds a place below a patriarch but above a metropolitan | - |
| (noun) a bishop in one of several Eastern Orthodox Churches in North America | - |
| exarchate | (noun) a diocese of the Eastern Orthodox Church | Synonyms: eparchy |
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| exasperation | (noun) actions that cause great irritation (or even anger) | - |
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| (noun) an exasperated feeling of annoyance | Synonyms: aggravation |
| exbibit | (noun) a unit of information equal to 1024 pebibits or 2^60 bits | Synonyms: Eibit |
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| exbibyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exabyte |
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| excavation | (noun) the act of extracting ores or coal etc from the earth | Synonyms: mining |
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| (noun) the act of digging | Synonyms: dig, digging |
| (noun) a hole in the ground made by excavating | - |
| (noun) the site of an archeological exploration | Synonyms: archeological site, dig |
| excavator | (noun) a machine for excavating | Synonyms: digger, power shovel, shovel |
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| (noun) a workman who excavates for foundations of buildings or for quarrying | - |
| exceedance | (noun) (geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given exposure time | - |
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| excellence | (noun) the quality of excelling; possessing good qualities in high degree | - |
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| (noun) an outstanding feature; something in which something or someone excels | Synonyms: excellency |
| excellency | (noun) an outstanding feature; something in which something or someone excels | Synonyms: excellence |
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| excelsior | (noun) thin curly wood shavings used for packing or stuffing | Synonyms: wood shavings |
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| exception | (noun) a deliberate act of omission | Synonyms: elision, exclusion |
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| (noun) an instance that does not conform to a rule or generalization | - |
| (noun) grounds for adverse criticism | - |
| excerpt | (noun) a passage selected from a larger work | Synonyms: excerption, extract, selection |
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| excerption | (noun) The act of excerpting or selecting from a larger work. | - |
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| (noun) a passage selected from a larger work | Synonyms: excerpt, extract, selection |