| adrenarche | (noun) the increase in activity of the adrenal glands just before puberty | - |
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| anarchism | (noun) a political theory favoring the abolition of governments | - |
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| anarchist | (noun) an advocate of anarchism | Synonyms: nihilist, syndicalist |
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| anarchy | (noun) a state of lawlessness and disorder (usually resulting from a failure of government) | Synonyms: lawlessness |
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| anorchia | (noun) absence of one of both testes | Synonyms: anorchidism, anorchism |
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| anorchidism | (noun) absence of one of both testes | Synonyms: anorchia, anorchism |
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| anorchism | (noun) absence of one of both testes | Synonyms: anorchia, anorchidism |
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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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| archives | (noun) collection of records especially about an institution | - |
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| archivist | (noun) a person in charge of collecting and cataloguing archives | - |
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| archness | (noun) inappropriate playfulness | Synonyms: impertinence, perkiness, pertness, sauciness |
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| archosaur | (noun) extinct reptiles including: dinosaurs, plesiosaurs, pterosaurs, ichthyosaurs, thecodonts | Synonyms: archosaurian, archosaurian reptile |
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| archosaurian | (noun) extinct reptiles including: dinosaurs, plesiosaurs, pterosaurs, ichthyosaurs, thecodonts | Synonyms: archosaur, archosaurian reptile |
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| archpriest | (noun) a senior clergyman and dignitary | Synonyms: hierarch, high priest, prelate, primate |
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| archway | (noun) a passageway under a curved masonry construction | Synonyms: arch |
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| autarchy | (noun) a political system governed by a single individual | Synonyms: autocracy |
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| (noun) economic independence as a national policy | Synonyms: autarky |
| birch | (noun) a switch consisting of a twig or a bundle of twigs from a birch tree; used to hit people as punishment | Synonyms: birch rod |
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| (noun) any betulaceous tree or shrub of the genus Betula having a thin peeling bark | Synonyms: birch tree |
| (noun) hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood | - |
| birchbark | (noun) a canoe made with the bark of a birch tree | Synonyms: birch bark, birchbark canoe |
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| blowtorch | (noun) a burner that mixes air and gas to produce a very hot flame | Synonyms: blowlamp, torch |
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| centrarchid | (noun) small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed | Synonyms: sunfish |
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| church | (noun) a service conducted in a house of worship | Synonyms: church service |
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| (noun) a place for public (especially Christian) worship | Synonyms: church building |
| (noun) one of the groups of Christians who have their own beliefs and forms of worship | Synonyms: Christian church |
| (noun) the body of people who attend or belong to a particular local church | - |
| churchgoer | (noun) a religious person who goes to church regularly | Synonyms: church member |
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| churchman | (noun) a clergyman or other person in religious orders | Synonyms: cleric, divine, ecclesiastic |
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| churchwarden | (noun) an officer in the Episcopal church who helps a parish priest with secular matters | - |
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| churchyard | (noun) the yard associated with a church | Synonyms: God's acre |
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| corchorus | (noun) any of various plants of the genus Corchorus having large leaves and cymose clusters of yellow flowers; a source of jute | - |
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| cornstarch | (noun) starch prepared from the grains of corn; used in cooking as a thickener | Synonyms: cornflour |
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| countercharge | (noun) a retaliatory charge | - |
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| (noun) a charge brought by an accused person against the accuser | - |
| countercheck | (noun) something that checks the correctness of a previous check | Synonyms: double check |
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| (noun) a check that restrains another check | - |
| countermarch | (noun) (military) a march in the reverse direction or back along the same route | - |
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| cryptorchidism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidy, cryptorchism |
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| cryptorchidy | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchism |
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| cryptorchism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchidy |
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| cytoarchitectonics | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitecture |
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| cytoarchitecture | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitectonics |
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| demarche | (noun) a move or step or maneuver in political or diplomatic affairs | - |
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| diarchy | (noun) a form of government having two joint rulers | Synonyms: dyarchy |
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| dyarchy | (noun) a form of government having two joint rulers | Synonyms: diarchy |
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| eparch | (noun) the governor or prefect of an eparchy in ancient Greece | - |
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| (noun) a bishop or metropolitan in charge of an eparchy in the Eastern Church | - |
| eparchy | (noun) a diocese of the Eastern Orthodox Church | Synonyms: exarchate |
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| (noun) a province in ancient Greece | - |
| ethnarch | (noun) the ruler of a province (as in the Roman Empire and Byzantine Empire) or certain religious rulers with secular authority | - |
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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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| gynarchy | (noun) a political system governed by a woman | Synonyms: gynecocracy |
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| handkerchief | (noun) a square piece of cloth used for wiping the eyes or nose or as a costume accessory | Synonyms: hankey, hankie, hanky |
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| hierarch | (noun) a senior clergyman and dignitary | Synonyms: archpriest, high priest, prelate, primate |
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| (noun) a person who holds a high position in a hierarchy | - |
| hierarchisation | (noun) The act or result of hierarchizing; the establishment of a hierarchy. | Synonyms: hierarchization |
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| hierarchization | (noun) The act or result of hierarchizing; the establishment of a hierarchy. | Synonyms: hierarchisation |
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| hierarchy | (noun) a series of ordered groupings of people or things within a system | - |
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| (noun) the organization of people at different ranks in an administrative body | Synonyms: pecking order, power structure |
| horchata | (noun) Spanish traditional beverage, made of ground almonds, sesame seeds, rice, barley, tigernuts (chufas), or melon seeds | - |
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| hypercholesteremia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesterolemia |
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| hypercholesterolemia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesteremia |
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| interchange | (noun) the act of changing one thing for another thing | Synonyms: exchange |
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| (noun) mutual interaction; the activity of reciprocating or exchanging (especially information) | Synonyms: give-and-take, reciprocation |
| (noun) reciprocal transfer of equivalent sums of money (especially the currencies of different countries) | Synonyms: exchange |
| (noun) a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams | - |
| interchangeability | (noun) the quality of being capable of exchange or interchange | Synonyms: exchangeability, fungibility, interchangeableness |
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| interchangeableness | (noun) the quality of being capable of exchange or interchange | Synonyms: exchangeability, fungibility, interchangeability |
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| kerchief | (noun) a square scarf that is folded into a triangle and worn over the head or about the neck | - |
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