| aborticide | (noun) the act of destroying a fetus | Synonyms: feticide |
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| (noun) a drug (or other chemical agent) that causes abortion | Synonyms: abortifacient, abortion-inducing drug |
| abortifacient | (noun) a drug (or other chemical agent) that causes abortion | Synonyms: aborticide, abortion-inducing drug |
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| abscissa | (noun) the value of a coordinate on the horizontal axis | - |
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| abscission | (noun) the act of cutting something off | Synonyms: cutting off |
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| (noun) shedding of flowers and leaves and fruit following formation of scar tissue in a plant | - |
| acacia | (noun) any of various spiny trees or shrubs of the genus Acacia | - |
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| academician | (noun) an educator who works at a college or university | Synonyms: academic, faculty member |
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| (noun) a scholar who is skilled in academic disputation | Synonyms: schoolman |
| (noun) someone elected to honorary membership in an academy | - |
| academicianship | (noun) the position of member of an honorary academy | - |
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| academicism | (noun) orthodoxy of a scholastic variety | Synonyms: academism, scholasticism |
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| (noun) Purely speculative thoughts and attitudes. | - |
| (noun) a style of painting and sculpture produced under the influence of European academies of art. | Synonyms: academic art, academism |
| acaracide | (noun) a chemical agent used to kill mites | Synonyms: acaricide |
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| acaricide | (noun) a chemical agent used to kill mites | Synonyms: acaracide |
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| acciaccatura | (noun) an embellishing note usually written in smaller size | Synonyms: appoggiatura, grace note |
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| accidence | (noun) the part of grammar that deals with the inflections of words | Synonyms: inflectional morphology |
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| accident | (noun) anything that happens suddenly or by chance without an apparent cause | Synonyms: chance event, fortuity, stroke |
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| (noun) an unfortunate mishap; especially one causing damage or injury | - |
| accidental | (noun) a musical notation that makes a note sharp or flat or natural although that is not part of the key signature | - |
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| achromaticity | (noun) the visual property of being without chromatic color | Synonyms: achromatism, colorlessness, colourlessness |
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| acicula | (noun) a needlelike part or structure of a plant or animal or crystal; as a spine or bristle or crystal | - |
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| acid | (noun) street name for lysergic acid diethylamide | Synonyms: back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen |
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| (noun) any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt | - |
| acidemia | (noun) a blood disorder characterized by an increased concentration of hydrogen ions in the blood (which falls below 7 on the pH scale) | - |
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| acidification | (noun) the process of becoming acid or being converted into an acid | - |
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| acidimetry | (noun) volumetric analysis using standard solutions of acids to measure the amount of a base present | - |
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| acidity | (noun) pH values below 7 | - |
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| (noun) the property of being acidic | Synonyms: sour, sourness |
| (noun) the taste experience when something acidic is taken into the mouth | Synonyms: acidulousness |
| acidophil | (noun) an organism that thrives in a relatively acid environment | Synonyms: acidophile |
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| acidophile | (noun) an organism that thrives in a relatively acid environment | Synonyms: acidophil |
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| acidophilus | (noun) a bacterium that is used to make yogurt and to supplement probiotics | Synonyms: Lactobacillus acidophilus |
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| acidosis | (noun) abnormally high acidity (excess hydrogen-ion concentration) of the blood and other body tissues | - |
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| acidulousness | (noun) the taste experience when something acidic is taken into the mouth | Synonyms: acidity |
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| acinus | (noun) one of the small sacs or saclike dilations in a compound gland | - |
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| (noun) one of the small drupes making up an aggregate or multiple fruit like a blackberry | - |
| acoustician | (noun) a physicist who specializes in acoustics | - |
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| actinomycin | (noun) any of various red antibiotics isolated from soil bacteria | - |
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| adducing | (noun) citing as evidence or proof | - |
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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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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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| aeciospore | (noun) spore of a rust fungus formed in an aecium | - |
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| aecium | (noun) fruiting body of some rust fungi bearing chains of aeciospores | - |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| aesthetician | (noun) a philosopher who specializes in the nature of beauty | Synonyms: esthetician |
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| (noun) a worker skilled in giving beauty treatments (manicures and facials etc.) | Synonyms: esthetician |
| aficionado | (noun) a serious devotee of some particular music genre or musical performer | - |
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| (noun) a fan of bull fighting | - |
| agnosticism | (noun) the disbelief in any claims of ultimate knowledge | Synonyms: scepticism, skepticism |
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| (noun) a religious orientation of doubt; a denial of ultimate knowledge of the existence of God | - |
| alopecia | (noun) loss of hair (especially on the head) or loss of wool or feathers; in humans it can result from heredity or hormonal imbalance or certain diseases or drugs and treatments (chemotherapy for cancer) | - |
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| americium | (noun) a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms | Synonyms: Am, atomic number 95 |
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| aminoaciduria | (noun) abnormal presence of amino acids in the urine; usually a symptom of metabolic defects | - |
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| amoxicillin | (noun) an antibiotic; a semisynthetic oral penicillin (trade names Amoxil and Larotid and Polymox and Trimox and Augmentin) used to treat bacterial infections | Synonyms: Amoxil, Augmentin, Larotid, Polymox, Trimox |
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| amphotericin | (noun) an antibiotic and antifungal agent | - |
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| ampicillin | (noun) semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin) | Synonyms: Polycillin, Principen, SK-Ampicillin |
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| analyticity | (noun) the property of being analytic | - |
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| ancient | (noun) a person who lived in ancient times | - |
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| (noun) a very old person | Synonyms: antediluvian |
| ancientness | (noun) extreme oldness | Synonyms: antiquity |
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| ancients | (noun) people who lived in times long past (especially during the historical period before the fall of the Roman Empire in western Europe) | - |
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| androecium | (noun) a male gametoecium | - |
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| annunciation | (noun) a formal public statement | Synonyms: announcement, declaration, proclamation |
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| annunciator | (noun) an indicator that announces which electrical circuit has been active (as on a telephone switchboard) | - |
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| antacid | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, alkalizer, antiacid, gastric antacid |
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| anthracite | (noun) a hard natural coal that burns slowly and gives intense heat | Synonyms: anthracite coal, hard coal |
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| anthropocentricity | (noun) an inclination to evaluate reality exclusively in terms of human values | Synonyms: anthropocentrism |
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| antiacid | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, alkalizer, antacid, gastric antacid |
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| anticipant | (noun) one who anticipates | Synonyms: anticipator |
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| anticipation | (noun) the act of predicting (as by reasoning about the future) | Synonyms: prediction, prevision |
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| (noun) something expected (as on the basis of a norm) | Synonyms: expectancy |
| (noun) an expectation | Synonyms: expectancy |
| (noun) anticipating with confidence of fulfillment | Synonyms: expectation |
| anticipator | (noun) one who anticipates | Synonyms: anticipant |
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| antimycin | (noun) a crystalline antibiotic active against various fungi | - |
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| apoliticism | (noun) Apathy and/or antipathy towards all political affiliations. | - |
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| apothecium | (noun) a cuplike ascocarp in many lichens and ascomycetous fungi | - |
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| appendicitis | (noun) inflammation of the vermiform appendix | - |
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| appreciation | (noun) a favorable judgment | Synonyms: admiration |
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| (noun) an increase in price or value | - |
| (noun) understanding of the nature or meaning or quality or magnitude of something | Synonyms: grasp, hold |
| (noun) delicate discrimination (especially of esthetic values) | Synonyms: discernment, perceptiveness, taste |
| (noun) an expression of gratitude | - |
| appreciativeness | (noun) warm friendly feelings of gratitude | Synonyms: gratefulness, thankfulness |
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| appreciator | (noun) a person who is fully aware of something and understands it | - |
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| archaicism | (noun) the use of an archaic expression | Synonyms: archaism |
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| arithmetician | (noun) someone who specializes in arithmetic | - |
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| aromaticity | (noun) The property of having an aroma. | - |
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| arrivederci | (noun) a farewell remark | Synonyms: adieu, adios, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| artificialism | (noun) Czech surrealism founded in 1928 by Jindrich Styrsky and Toyen (Marie Cerminova). | - |
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| artificiality | (noun) the quality of being produced by people and not occurring naturally | - |
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| asceticism | (noun) rigorous self-denial and active self-restraint | Synonyms: ascesis |
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| (noun) the trait of great self-denial (especially refraining from worldly pleasures) | Synonyms: austerity, nonindulgence |
| (noun) the doctrine that through renunciation of worldly pleasures it is possible to achieve a high spiritual or intellectual state | - |
| ascidian | (noun) minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves | - |
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| ascites | (noun) accumulation of serous fluid in peritoneal cavity | - |
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| associability | (noun) the capability of being easily associated or joined or connected in thought | Synonyms: associableness |
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| associableness | (noun) the capability of being easily associated or joined or connected in thought | Synonyms: associability |
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| associate | (noun) a degree granted by a two-year college on successful completion of the undergraduates course of studies | Synonyms: associate degree |
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| (noun) any event that usually accompanies or is closely connected with another | - |
| (noun) a person who joins with others in some activity or endeavor | - |
| (noun) a friend who is frequently in the company of another | Synonyms: companion, comrade, familiar, fellow |
| (noun) a person with subordinate membership in a society, institution, or commercial enterprise | - |
| associateship | (noun) the position of associate (as in an office or academy) | - |
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| association | (noun) the act of consorting with or joining with others | - |
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| (noun) the process of bringing ideas or events together in memory or imagination | Synonyms: connection, connexion |
| (noun) a formal organization of people or groups of people | - |
| (noun) (ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species | - |
| (noun) (chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding | - |
| (noun) a relation resulting from interaction or dependence | - |
| (noun) a social or business relationship | Synonyms: affiliation, tie-up, tie |
| (noun) the state of being connected together as in memory or imagination | - |
| associationism | (noun) (psychology) a theory that association is the basic principle of mental activity | Synonyms: association theory |
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| astrophysicist | (noun) an astronomer who studies the physical properties of celestial bodies | - |
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| athleticism | (noun) intense energy | Synonyms: strenuosity |
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| atonicity | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atony |
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| atrociousness | (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrocity, barbarity, barbarousness, heinousness |
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| atrocity | (noun) an act of atrocious cruelty | Synonyms: inhumanity |
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| (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrociousness, barbarity, barbarousness, heinousness |
| audaciousness | (noun) fearless daring | Synonyms: audacity, temerity |
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| (noun) aggressive boldness or unmitigated effrontery | Synonyms: audacity |
| audacity | (noun) fearless daring | Synonyms: audaciousness, temerity |
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| (noun) aggressive boldness or unmitigated effrontery | Synonyms: audaciousness |
| auspiciousness | (noun) the favorable quality of strongly indicating a successful result | Synonyms: propitiousness |
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| australopithecine | (noun) any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago | - |
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| authenticity | (noun) undisputed credibility | Synonyms: genuineness, legitimacy |
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| autoeroticism | (noun) using your own body as a sexual object | Synonyms: autoerotism |
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| avariciousness | (noun) extreme greed for material wealth | Synonyms: avarice, covetousness, cupidity |
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| azithromycin | (noun) a systemic antibacterial medicine (trade name Zithromax) that is prescribed to treat bacterial infections in many different parts of the body | Synonyms: Zithromax |
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| bacillus | (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil | Synonyms: B |
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| bacitracin | (noun) a polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organisms; usually applied locally | - |
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| bacteriacide | (noun) any chemical agent that destroys bacteria | Synonyms: bactericide |
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| bactericide | (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial, antibacterial drug |
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| (noun) any chemical agent that destroys bacteria | Synonyms: bacteriacide |
| balancing | (noun) getting two things to correspond | Synonyms: reconciliation |
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| beautician | (noun) someone who works in a beauty parlor | Synonyms: cosmetician |
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| beneficiary | (noun) the semantic role of the intended recipient who benefits from the happening denoted by the verb in the clause | Synonyms: benefactive role |
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| (noun) the recipient of funds or other benefits | Synonyms: donee |