| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| acedia | (noun) apathy and inactivity in the practice of virtue (personified as one of the deadly sins) | Synonyms: laziness, sloth |
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| actinomyxidian | (noun) of or relating to parasites of worms | - |
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| adiabatic | (adjective) occurring without loss or gain of heat | - |
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| adiabaticity | (noun) The condition of occurring without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation). | - |
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| adiaphoron | (noun) (Stoic philosophy) a matter having no moral merit or demerit. | - |
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| (noun) a religious ceremonial or ritual observance that is held to be an affair of the individual conscience because it is neither forbidden nor enjoined by the scriptures. | - |
| antemeridian | (adjective) before noon | - |
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| antheridial | (adjective) relating to or characterized by an antheridium | - |
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| antidiabetic | (noun) a drug used to treat diabetes mellitus | Synonyms: antidiabetic drug |
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| antidiarrheal | (noun) a drug used to control or stop diarrhea | Synonyms: antidiarrheal drug |
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| arachnidian | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnoid, spiderlike, spiderly, spidery |
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| arcadian | (adjective) (used with regard to idealized country life) idyllically rustic | Synonyms: bucolic, pastoral |
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| archidiaconal | (adjective) of or relating to an archdeacon or his office | - |
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| archidiaconate | (noun) office or position of an archdeacon | - |
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| ascidian | (noun) minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves | - |
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| basidial | (adjective) relating to or characterized by basidia | - |
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| benzodiazepine | (noun) any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency | - |
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| bioremediation | (noun) the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances | - |
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| (noun) the branch of biotechnology that uses biological process to overcome environmental problems | - |
| biradial | (adjective) showing both bilateral and radial symmetry | - |
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| biradially | (adverb) in a biradial manner | - |
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| bradycardia | (noun) abnormally slow heartbeat | - |
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| brodiaea | (noun) any of several plants of the genus Brodiaea having basal grasslike leaves and globose flower heads on leafless stems resembling those of genus Allium | - |
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| candidiasis | (noun) an infection caused by fungi of the genus Monilia or Candida (especially Candida albicans) | Synonyms: monilia disease, moniliasis |
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| cardia | (noun) the opening into the stomach and that part of the stomach connected to the esophagus | - |
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| cardiac | (adjective) of or relating to the heart | - |
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| chlamydia | (noun) coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract | - |
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| (noun) a sexually transmitted infection caused by bacteria of the genus Chlamydia | - |
| chlamydial | (adjective) of or pertaining to the sexually transmitted infection or to the parasite | - |
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| chlordiazepoxide | (noun) a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism | Synonyms: Libritabs, Librium |
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| circadian | (adjective) of or relating to biological processes occurring at 24-hour intervals | - |
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| clostridia | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridium |
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| comedian | (noun) a professional performer who tells jokes and performs comical acts | Synonyms: comic |
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| (noun) an actor in a comedy | - |
| cordial | (adjective) diffusing warmth and friendliness | Synonyms: affable, amiable, genial |
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| (adjective) politely warm and friendly | - |
| (adjective) sincerely or intensely felt | - |
| (noun) strong highly flavored sweet liquor usually drunk after a meal | Synonyms: liqueur |
| cordiality | (noun) a cordial disposition | Synonyms: amity |
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| cordially | (adverb) in a hearty manner | Synonyms: heartily, warmly |
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| custodial | (adjective) providing protective supervision; watching over or safeguarding | Synonyms: tutelar, tutelary |
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| custodian | (noun) one having charge of buildings or grounds or animals | Synonyms: keeper, steward |
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| custodianship | (noun) the position of custodian | - |
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| cyclopaedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopedia, encyclopaedia, encyclopedia |
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| cyclopedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopaedia, encyclopaedia, encyclopedia |
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| cypripedia | (noun) a plant or flower of the genus Cypripedium | - |
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| dextrocardia | (noun) abnormal condition where the heart is located toward the right side of the chest | - |
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| diabatic | (adjective) involving a transfer of heat | - |
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| diabetes | (noun) a polygenic disease characterized by abnormally high glucose levels in the blood; any of several metabolic disorders marked by excessive urination and persistent thirst | - |
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| diabetic | (adjective) of or relating to or causing diabetes | - |
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| (adjective) suffering from diabetes | - |
| (noun) someone who has diabetes | - |
| diablotin | (noun) a thin round slice of bread usually served with soup, especially consomme. | - |
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| diabolatry | (noun) the acts or rites of worshiping devils | Synonyms: demonolatry, devil-worship |
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| diabolic | (adjective) extremely evil or cruel; expressive of cruelty or befitting hell | Synonyms: demonic, diabolical, fiendish, hellish, infernal, satanic, unholy |
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| (adjective) showing the cunning or ingenuity or wickedness typical of a devil | Synonyms: devilish, diabolical, mephistophelean, mephistophelian |
| diabolical | (adjective) extremely evil or cruel; expressive of cruelty or befitting hell | Synonyms: demonic, diabolic, fiendish, hellish, infernal, satanic, unholy |
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| (adjective) showing the cunning or ingenuity or wickedness typical of a devil | Synonyms: devilish, diabolic, mephistophelean, mephistophelian |
| diabolically | (adverb) as a devil; in an evil manner | Synonyms: devilishly, fiendishly |
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| diabolise | (verb) turn into a devil or make devilish | Synonyms: devilise, devilize, diabolize |
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| diabolism | (noun) a belief in and reverence for devils (especially Satan) | Synonyms: demonism, Satanism |
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| diabolist | (noun) an adherent of Satan or Satanism | Synonyms: Satanist |
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| diabolize | (verb) turn into a devil or make devilish | Synonyms: devilise, devilize, diabolise |
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| diacetylmorphine | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: heroin |
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| diachronic | (adjective) used of the study of a phenomenon (especially language) as it changes through time | Synonyms: historical |
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| diachrony | (noun) the study of linguistic change | Synonyms: diachronic linguistics, historical linguistics |
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| diacritic | (adjective) capable of distinguishing | Synonyms: diacritical |
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| (noun) a mark added to a letter to indicate a special pronunciation | Synonyms: diacritical mark |
| diacritical | (adjective) capable of distinguishing | Synonyms: diacritic |
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| diadem | (noun) an ornamental jeweled headdress signifying sovereignty | Synonyms: crown |
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| diadromous | (adjective) (used of fish) migratory between fresh and salt waters | - |
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| diaeresis | (noun) a diacritical mark (two dots) placed over a vowel to indicate that it does not form a diphthong with an adjacent vowel | Synonyms: dieresis |
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| diaglyph | (noun) glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem (as opposed to cameo) | Synonyms: intaglio |
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| diagnosable | (adjective) capable of being diagnosed | - |
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| diagnose | (verb) determine or distinguish the nature of a problem or an illness through a diagnostic analysis | Synonyms: name |
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| (verb) subject to a medical analysis | - |
| diagnosing | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosis |
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| diagnosis | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosing |
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| diagnostic | (adjective) concerned with diagnosis; used for furthering diagnosis | - |
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| (adjective) characteristic or indicative of a disease | Synonyms: symptomatic |
| diagnostician | (noun) a doctor who specializes in medical diagnosis | Synonyms: pathologist |
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| diagnostics | (noun) the branch of medical science dealing with the classification of disease | Synonyms: nosology |
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| diagonal | (adjective) having an oblique or slanted direction | Synonyms: aslant, aslope, slanted, slanting, sloped, sloping |
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| (adjective) connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face | - |
| (noun) a punctuation mark (/) used to separate related items of information | Synonyms: separatrix, slash, solidus, stroke, virgule |
| (noun) an oblique line of squares of the same color on a checkerboard | - |
| (noun) (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry | - |
| (noun) a line or cut across a fabric that is not at right angles to a side of the fabric | Synonyms: bias |
| (noun) (geometry) a straight line connecting any two vertices of a polygon that are not adjacent | - |
| diagonalisation | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalization |
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| diagonalise | (verb) transform a matrix to a diagonal matrix | Synonyms: diagonalize |
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| diagonalizable | (adjective) capable of being transformed into a diagonal matrix | - |
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| diagonalization | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalisation |
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| diagonalize | (verb) transform a matrix to a diagonal matrix | Synonyms: diagonalise |
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| diagonally | (adverb) in a diagonal manner | - |
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| diagram | (noun) a drawing intended to explain how something works; a drawing showing the relation between the parts | - |
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| (verb) make a schematic or technical drawing that shows interactions among variables or how something is constructed | Synonyms: plot |
| diagrammatic | (adjective) shown or represented by diagrams | Synonyms: diagrammatical |
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| diagrammatical | (adjective) shown or represented by diagrams | Synonyms: diagrammatic |
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| diagrammatically | (adverb) in a diagrammatic manner | Synonyms: graphically |
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| diagramming | (noun) providing a chart or outline of a system | Synonyms: schematisation, schematization |
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| diakinesis | (noun) the final stage of the prophase of meiosis | - |
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| dial | (noun) the face of a timepiece; graduated to show the hours | - |
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| (noun) a disc on a telephone that is rotated a fixed distance for each number called | Synonyms: telephone dial |
| (noun) the circular graduated indicator on various measuring instruments | - |
| (noun) the control on a radio or television set that is used for tuning | - |
| (verb) choose by means of a dial | - |
| (verb) operate a dial to select a telephone number | - |
| dialect | (noun) the usage or vocabulary that is characteristic of a specific group of people | Synonyms: accent, idiom |
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| dialectal | (adjective) belonging to or characteristic of a dialect | - |
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| dialectic | (adjective) of or relating to or employing dialectic | Synonyms: dialectical |
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| (noun) any formal system of reasoning that arrives at the truth by the exchange of logical arguments | - |
| (noun) a contradiction of ideas that serves as the determining factor in their interaction | - |
| dialectical | (adjective) of or relating to or employing dialectic | Synonyms: dialectic |
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| dialectically | (adverb) in a dialectic manner | - |
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| dialectician | (noun) a logician skilled in dialectic | - |
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| dialectics | (noun) a rationale for dialectical materialism based on change through the conflict of opposing forces | - |
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| dialectology | (noun) the branch of philology that is devoted to the study of dialects | - |
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| dialog | (noun) the lines spoken by characters in drama or fiction | Synonyms: dialogue |
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| (noun) a conversation between two persons | Synonyms: dialogue, duologue |
| (noun) a literary composition in the form of a conversation between two people | Synonyms: dialogue |
| dialogism | (noun) the use in a text of different tones or viewpoints, whose interaction or contradiction is important to the text's interpretation. | - |
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| dialogue | (noun) the lines spoken by characters in drama or fiction | Synonyms: dialog |
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| (noun) a conversation between two persons | Synonyms: dialog, duologue |
| (noun) a literary composition in the form of a conversation between two people | Synonyms: dialog |
| (noun) a discussion intended to produce an agreement | Synonyms: negotiation, talks |
| dialyse | (verb) separate by dialysis | Synonyms: dialyze |
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| dialysis | (noun) separation of substances in solution by means of their unequal diffusion through semipermeable membranes | - |
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| dialyze | (verb) separate by dialysis | Synonyms: dialyse |
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| dialyzer | (noun) a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes | Synonyms: dialysis machine |
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| diam | (noun) the length of a straight line passing through the center of a circle and connecting two points on the circumference | Synonyms: diameter |
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