| apocryphalness | (noun) The property of being of doubtful authenticity, of lacking authority, or of not being regarded as canonical. | - |
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| (noun) The property of being of dubious veracity; of questionable accuracy or truthfulness. | - |
| apoliticism | (noun) Apathy and/or antipathy towards all political affiliations. | - |
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| apologetics | (noun) the branch of theology that is concerned with the defense of Christian doctrines | - |
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| apomict | (noun) a plant that reproduces or is reproduced by apomixis | - |
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| apothecary | (noun) a health professional trained in the art of preparing and dispensing drugs | Synonyms: chemist, druggist, pharmacist, pill pusher, pill roller |
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| apothecium | (noun) a cuplike ascocarp in many lichens and ascomycetous fungi | - |
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| apparatchik | (noun) a communist who was a member of the administrative system of a communist party | - |
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| (noun) a humorous but derogatory term for an official of a large organization (especially a political organization) | - |
| apparency | (noun) the property of being apparent | Synonyms: apparentness |
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| appearance | (noun) the act of appearing in public view | - |
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| (noun) formal attendance (in court or at a hearing) of a party in an action | Synonyms: appearing, coming into court |
| (noun) pretending that something is the case in order to make a good impression | Synonyms: show |
| (noun) outward or visible aspect of a person or thing | Synonyms: visual aspect |
| (noun) a mental representation | - |
| (noun) the event of coming into sight | - |
| appendectomy | (noun) surgical removal of the vermiform appendix | Synonyms: appendicectomy |
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| appendicectomy | (noun) surgical removal of the vermiform appendix | Synonyms: appendectomy |
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| appendicitis | (noun) inflammation of the vermiform appendix | - |
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| appendicle | (noun) a small appendage | - |
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| appendicularia | (noun) free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates | - |
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| apperception | (noun) the process whereby perceived qualities of an object are related to past experience | - |
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| appetence | (noun) a feeling of craving something | Synonyms: appetency, appetite |
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| appetency | (noun) a feeling of craving something | Synonyms: appetence, appetite |
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| applecart | (noun) a handcart from which apples and other fruit are sold in the street | - |
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| (noun) the planning that is disrupted when someone `upsets the applecart' | - |
| applejack | (noun) distilled from hard cider | - |
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| applesauce | (noun) nonsensical talk or writing | Synonyms: codswallop, folderol, rubbish, trash, tripe, trumpery, wish-wash |
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| (noun) puree of stewed apples usually sweetened and spiced | Synonyms: apple sauce |
| appliance | (noun) durable goods for home or office use | - |
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| (noun) a device or control that is very useful for a particular job | Synonyms: contraption, contrivance, convenience, gadget, gismo, gizmo, widget |
| applicability | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: pertinence, pertinency |
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| applicant | (noun) a person who requests or seeks something such as assistance or employment or admission | Synonyms: applier |
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| application | (noun) the action of putting something into operation | - |
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| (noun) a diligent effort | Synonyms: diligence |
| (noun) the act of bringing something to bear; using it for a particular purpose | Synonyms: practical application |
| (noun) the work of applying something | Synonyms: coating, covering |
| (noun) liquid preparation having a soothing or antiseptic or medicinal action when applied to the skin | Synonyms: lotion |
| (noun) a verbal or written request for assistance or employment or admission to a school | - |
| (noun) a program that gives a computer instructions that provide the user with tools to accomplish a task | Synonyms: application program, applications programme |
| applicator | (noun) a device for applying a substance | Synonyms: applier |
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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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| apprentice | (noun) works for an expert to learn a trade | Synonyms: learner, prentice |
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| apprenticeship | (noun) the position of apprentice | - |
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| approach | (noun) the act of drawing spatially closer to something | Synonyms: approaching, coming |
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| (noun) a relatively short golf shot intended to put the ball onto the putting green | Synonyms: approach shot |
| (noun) ideas or actions intended to deal with a problem or situation | Synonyms: attack, plan of attack |
| (noun) a way of entering or leaving | Synonyms: access |
| (noun) the temporal property of becoming nearer in time | Synonyms: approaching, coming |
| (noun) a close approximation | - |
| (noun) a tentative suggestion designed to elicit the reactions of others | Synonyms: advance, feeler, overture |
| (noun) the event of one object coming closer to another | Synonyms: approaching |
| (noun) the final path followed by an aircraft as it is landing | Synonyms: approach path, glide path, glide slope |
| approachability | (noun) the attribute of being easy to meet or deal with | Synonyms: accessibility |
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| approaching | (noun) the act of drawing spatially closer to something | Synonyms: approach, coming |
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| (noun) the temporal property of becoming nearer in time | Synonyms: approach, coming |
| (noun) the event of one object coming closer to another | Synonyms: approach |
| appurtenance | (noun) a supplementary component that improves capability | Synonyms: accessory, add-on, supplement |
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| (noun) equipment consisting of miscellaneous articles needed for a particular operation or sport etc. | Synonyms: gear, paraphernalia |
| apricot | (noun) a shade of pink tinged with yellow | Synonyms: peach, salmon pink, yellowish pink |
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| (noun) downy yellow to rosy-colored fruit resembling a small peach | - |
| (noun) Asian tree having clusters of usually white blossoms and edible fruit resembling the peach | Synonyms: apricot tree |
| aquaculture | (noun) rearing aquatic animals or cultivating aquatic plants for food | - |
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| aquatic | (noun) a plant that lives in or on water | - |
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| aquatics | (noun) sports that involve bodies of water | Synonyms: water sport |
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| aqueduct | (noun) a conduit that resembles a bridge but carries water over a valley | - |
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| aquiculture | (noun) a technique of growing plants (without soil) in water containing dissolved nutrients | Synonyms: hydroponics, tank farming |
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| arachnid | (noun) air-breathing arthropods characterized by simple eyes and four pairs of legs | Synonyms: arachnoid |
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| arachnoid | (noun) air-breathing arthropods characterized by simple eyes and four pairs of legs | Synonyms: arachnid |
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| (noun) the middle of the 3 meninges | Synonyms: arachnoid membrane |
| arachnophobia | (noun) a morbid fear of spiders | - |
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| araucaria | (noun) any of several tall South American or Australian trees with large cones and edible seeds | - |
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| arboriculture | (noun) the tending of and caring for trees | Synonyms: tree farming |
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| arboriculturist | (noun) someone trained in forestry | Synonyms: forester, tree farmer |
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| arc | (noun) electrical conduction through a gas in an applied electric field | Synonyms: discharge, electric arc, electric discharge, spark |
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| (noun) a continuous portion of a circle | - |
| (noun) something curved in shape | Synonyms: bow |
| arcade | (noun) a structure composed of a series of arches supported by columns | Synonyms: colonnade |
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| (noun) a covered passageway with shops and stalls on either side | - |
| arcanum | (noun) information known only to a special group | Synonyms: secret |
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| arccos | (noun) the inverse function of the cosine; the angle that has a cosine equal to a given number | Synonyms: arc cosine, arccosine, inverse cosine |
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| arccosecant | (noun) the angle that has a cosecant equal to a given number | Synonyms: arc cosecant, inverse cosecant |
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| arccosine | (noun) the inverse function of the cosine; the angle that has a cosine equal to a given number | Synonyms: arc cosine, arccos, inverse cosine |
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| arccotangent | (noun) the inverse function of the cotangent; the angle that has a cotangent equal to a given number | Synonyms: arc cotangent, inverse cotangent |
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| arcdegree | (noun) a measure for arcs and angles | Synonyms: degree |
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| arcella | (noun) an amoeba-like protozoan with a chitinous shell resembling an umbrella | - |
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| arch | (noun) (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it | - |
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| (noun) a passageway under a curved masonry construction | Synonyms: archway |
| (noun) a curved bony structure supporting or enclosing organs (especially the inner sides of the feet) | - |
| (noun) a curved shape in the vertical plane that spans an opening | - |
| archaebacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacterium, archaeobacteria, archeobacteria |
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| archaebacterium | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaeobacteria, archeobacteria |
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| archaeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archeobacteria |
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| archaeologist | (noun) an anthropologist who studies prehistoric people and their culture | Synonyms: archeologist |
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| archaeology | (noun) the branch of anthropology that studies prehistoric people and their cultures | Synonyms: archeology |
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| archaeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: Archaeopteryx lithographica, archeopteryx |
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| archaeornis | (noun) extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing | - |
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| archaicism | (noun) the use of an archaic expression | Synonyms: archaism |
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| archaism | (noun) the use of an archaic expression | Synonyms: archaicism |
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| archaist | (noun) an expert or collector of antiquities | Synonyms: antiquarian, antiquary |
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| (noun) a person who archaizes | - |
| archangel | (noun) an angel ranked above the highest rank in the celestial hierarchy | - |
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| (noun) a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally | Synonyms: Angelica Archangelica, garden angelica |
| archbishop | (noun) a bishop of highest rank | - |
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| archbishopric | (noun) the territorial jurisdiction of an archbishop | - |
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| archdeacon | (noun) (Anglican Church) an ecclesiastical dignitary usually ranking just below a bishop | - |
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| archdeaconry | (noun) the territorial jurisdiction of an archdeacon | - |
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| archdiocese | (noun) the diocese of an archbishop | - |
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| archduchess | (noun) a wife or widow of an archduke or a princess of the former ruling house of Austria | - |
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| archduchy | (noun) the domain controlled by an archduke or archduchess | - |
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| archduke | (noun) a sovereign prince of the former ruling house of Austria | - |
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| archegonium | (noun) a female sex organ occurring in mosses, ferns, and most gymnosperms | - |
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| archenteron | (noun) central cavity of the gastrula; becomes the intestinal or digestive cavity | - |
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| archeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archaeobacteria |
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| archeologist | (noun) an anthropologist who studies prehistoric people and their culture | Synonyms: archaeologist |
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| archeology | (noun) the branch of anthropology that studies prehistoric people and their cultures | Synonyms: archaeology |
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| archeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: archaeopteryx, Archaeopteryx lithographica |
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| archer | (noun) a person who is expert in the use of a bow and arrow | Synonyms: bowman |
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| archerfish | (noun) any of several small freshwater fishes that catch insects by squirting water at them and knocking them into the water; found in Indonesia and Australia | Synonyms: Toxotes jaculatrix |
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| archery | (noun) the sport of shooting arrows with a bow | - |
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| archespore | (noun) primitive cell or group of cells from which a mother cell develops | Synonyms: archesporium |
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| archesporium | (noun) primitive cell or group of cells from which a mother cell develops | Synonyms: archespore |
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| archetype | (noun) something that serves as a model or a basis for making copies | Synonyms: original, pilot |
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| archiannelid | (noun) small primitive marine worm lacking external segmentation and resembling polychaete larvae | - |
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| archidiaconate | (noun) office or position of an archdeacon | - |
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| archil | (noun) any of various lecanoras that yield the dye archil | Synonyms: orchil |
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| (noun) a purplish dye obtained from orchil lichens | Synonyms: cudbear, orchil |
| archimandrite | (noun) the superior of an abbey of monks | Synonyms: abbot |
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| archine | (noun) a Russian unit of length (71 cm) | - |
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| archipallium | (noun) the olfactory cortex of the cerebrum | Synonyms: paleocortex |
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| archipelago | (noun) a group of many islands in a large body of water | - |
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| architect | (noun) someone who creates plans to be used in making something (such as buildings) | Synonyms: designer |
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| architectonics | (noun) the science of architecture | Synonyms: tectonics |
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| architecture | (noun) the profession of designing buildings and environments with consideration for their esthetic effect | - |
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| (noun) an architectural product or work | - |
| (noun) (computer science) the structure and organization of a computer's hardware or system software | Synonyms: computer architecture |
| (noun) the discipline dealing with the principles of design and construction and ornamentation of fine buildings | - |
| architeuthis | (noun) largest mollusk known about but never seen (to 60 feet long) | Synonyms: giant squid |
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| architrave | (noun) the lowest part of an entablature; rests immediately on the capitals of the columns | - |
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| (noun) the molding around a door or window | - |
| archive | (noun) a depository containing historical records and documents | - |
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