| abecedarian | (noun) a novice learning the rudiments of some subject | - |
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| abecedarius | (noun) a poem having lines beginning with letters of the alphabet in regular order | - |
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| abidance | (noun) the act of abiding (enduring without yielding) | - |
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| (noun) the act of dwelling in a place | Synonyms: residence, residency |
| (noun) acting according to certain accepted standards | Synonyms: compliance, conformation, conformity |
| abracadabra | (noun) gibberish and nonsense | - |
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| abradant | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abrader |
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| (noun) a substance that abrades or wears down | Synonyms: abrasive, abrasive material |
| abundance | (noun) the property of a more than adequate quantity or supply | Synonyms: copiousness, teemingness |
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| (noun) (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million | - |
| (noun) (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present | - |
| accommodation | (noun) the act of providing something (lodging or seat or food) to meet a need | - |
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| (noun) (physiology) the automatic adjustment in focal length of the natural lens of the eye | - |
| (noun) living quarters provided for public convenience | - |
| (noun) in the theories of Jean Piaget: the modification of internal representations in order to accommodate a changing knowledge of reality | - |
| (noun) a settlement of differences | - |
| (noun) making or becoming suitable; adjusting to circumstances | Synonyms: adjustment, fitting |
| accommodator | (noun) someone who performs a service or does a favor | Synonyms: obliger |
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| accordance | (noun) the act of granting rights | Synonyms: accordance of rights |
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| (noun) concurrence of opinion | Synonyms: accord, conformity |
| adactylia | (noun) congenital absence of fingers and/or toes | Synonyms: adactylism, adactyly |
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| adactylism | (noun) congenital absence of fingers and/or toes | Synonyms: adactylia, adactyly |
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| adactyly | (noun) congenital absence of fingers and/or toes | Synonyms: adactylia, adactylism |
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| adage | (noun) a condensed but memorable saying embodying some important fact of experience that is taken as true by many people | Synonyms: byword, proverb, saw |
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| adagio | (noun) a slow section of a pas de deux requiring great skill and strength by the dancers | - |
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| (noun) (music) a composition played in adagio tempo (slowly and gracefully) | - |
| adamance | (noun) resoluteness by virtue of being unyielding and inflexible | Synonyms: obduracy, unyieldingness |
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| adamant | (noun) very hard native crystalline carbon valued as a gem | Synonyms: diamond |
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| adaptability | (noun) the ability to change (or be changed) to fit changed circumstances | - |
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| adaptation | (noun) (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light) | - |
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| (noun) a written work (as a novel) that has been recast in a new form | Synonyms: version |
| (noun) the process of adapting to something (such as environmental conditions) | Synonyms: adaption, adjustment |
| adapter | (noun) device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible | Synonyms: adaptor |
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| (noun) a musician who adapts a composition for particular voices or instruments or for another style of performance | Synonyms: arranger, transcriber |
| adaption | (noun) the process of adapting to something (such as environmental conditions) | Synonyms: adaptation, adjustment |
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| adaptor | (noun) device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible | Synonyms: adapter |
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| addax | (noun) large antelope with lightly spiraled horns of desert regions of northern Africa | Synonyms: Addax nasomaculatus |
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| affidavit | (noun) written declaration made under oath; a written statement sworn to be true before someone legally authorized to administer an oath | - |
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| afterdamp | (noun) a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine | - |
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| agenda | (noun) a temporally organized plan for matters to be attended to | Synonyms: docket, schedule |
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| (noun) a list of matters to be taken up (as at a meeting) | Synonyms: agendum, order of business |
| alidad | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidade |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidade |
| alidade | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidad |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidad |
| allamanda | (noun) a plant of the genus Allamanda having large showy funnel-shaped flowers in terminal cymes | - |
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| amadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: avadavat |
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| amiodarone | (noun) an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective | Synonyms: Cordarone |
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| amygdala | (noun) an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior | Synonyms: amygdaloid nucleus, corpus amygdaloideum |
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| amygdalin | (noun) a bitter cyanogenic glucoside extracted from the seeds of apricots and plums and bitter almonds | - |
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| amygdaloid | (noun) volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits | - |
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| amygdalotomy | (noun) psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence) | - |
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| anaconda | (noun) large arboreal boa of tropical South America | Synonyms: Eunectes murinus |
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| andante | (noun) a musical composition or musical passage to be performed moderately slow | - |
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| (noun) a moderately slow tempo (a walking pace) | - |
| andromeda | (noun) any of several shrubs of the genus Andromeda having leathery leaves and clusters of small flowers | - |
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| (noun) broad-leaved evergreen Asiatic shrub with glossy leaves and drooping clusters of white flowers | Synonyms: Japanese andromeda, lily-of-the-valley tree, Pieris japonica |
| antioxidant | (noun) substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides | - |
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| antipodal | (noun) the relation of opposition along a diameter | Synonyms: antipodal opposition, diametrical opposition |
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| aoudad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, arui, audad, Barbary sheep, maned sheep |
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| apadana | (noun) the great hall in ancient Persian palaces | - |
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| appendage | (noun) a part that is joined to something larger | - |
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| (noun) an external body part that projects from the body | Synonyms: extremity, member |
| (noun) a natural prolongation or projection from a part of an organism either animal or plant | Synonyms: outgrowth, process |
| armada | (noun) a large fleet | - |
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| artiodactyl | (noun) placental mammal having hooves with an even number of functional toes on each foot | Synonyms: artiodactyl mammal, even-toed ungulate |
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| asafetida | (noun) the brownish gum resin of various plants; has strong taste and odor; formerly used as an antispasmodic | Synonyms: asafoetida |
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| asafoetida | (noun) the brownish gum resin of various plants; has strong taste and odor; formerly used as an antispasmodic | Synonyms: asafetida |
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| ascendance | (noun) the state that exists when one person or group has power over another | Synonyms: ascendancy, ascendence, ascendency, control, dominance |
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| ascendancy | (noun) the state that exists when one person or group has power over another | Synonyms: ascendance, ascendence, ascendency, control, dominance |
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| ascendant | (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, antecedent, ascendent, root |
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| (noun) position or state of being dominant or in control | Synonyms: ascendent |
| attendance | (noun) the act of being present (at a meeting or event etc.) | Synonyms: attending |
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| (noun) the number of people that are present | - |
| (noun) the frequency with which a person is present | - |
| attendant | (noun) an event or situation that happens at the same time as or in connection with another | Synonyms: accompaniment, co-occurrence, concomitant |
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| (noun) someone who waits on or tends to or attends to the needs of another | Synonyms: attender, tender |
| (noun) a person who is present and participates in a meeting | Synonyms: attendee, attender, meeter |
| 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 |
| audad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, aoudad, arui, Barbary sheep, maned sheep |
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| autodidact | (noun) a person who has taught himself | - |
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| autostrada | (noun) an expressway in an Italian-speaking country | - |
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| avadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: amadavat |
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| avoidance | (noun) deliberately avoiding; keeping away from or preventing from happening | Synonyms: dodging, shunning, turning away |
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| azedarach | (noun) tree of northern India and China having purple blossoms and small inedible yellow fruits; naturalized in the southern United States as a shade tree | Synonyms: azederach, China tree, chinaberry, chinaberry tree, Melia azedarach, Melia azederach, Persian lilac, pride-of-India |
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| backwardation | (noun) the market condition wherein the price of a forward or futures contract is trading below the expected spot price at contract maturity. | - |
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| badass | (noun) A mean or belligerent person | - |
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| (noun) A person considered impressive due to extreme attitudes, behavior or appearance | - |
| baldachin | (noun) ornamented canopy supported by columns or suspended from a roof or projected from a wall (as over an altar) | - |
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| balderdash | (noun) trivial nonsense | Synonyms: fiddle-faddle, piffle |
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| bandage | (noun) a piece of soft material that covers and protects an injured part of the body | Synonyms: patch |
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| bandaging | (noun) the act of applying a bandage | Synonyms: binding, dressing |
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| bandana | (noun) large and brightly colored handkerchief; often used as a neckerchief | Synonyms: bandanna |
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| bandanna | (noun) large and brightly colored handkerchief; often used as a neckerchief | Synonyms: bandana |
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| barracuda | (noun) any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth | - |
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| beldam | (noun) a woman of advanced age | Synonyms: beldame |
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| (noun) an ugly evil-looking old woman | Synonyms: beldame, crone, hag, witch |
| beldame | (noun) a woman of advanced age | Synonyms: beldam |
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| (noun) an ugly evil-looking old woman | Synonyms: beldam, crone, hag, witch |
| bendability | (noun) the property of being easily bent without breaking | Synonyms: pliability |
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| bipedalism | (noun) the bodily attribute of being bipedal; having two feet | - |
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| birthday | (noun) an anniversary of the day on which a person was born (or the celebration of it) | - |
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| (noun) the date on which a person was born | Synonyms: natal day |
| blackdamp | (noun) the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life | Synonyms: chokedamp |
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| bondage | (noun) sexual practice that involves physically restraining (by cords or handcuffs) one of the partners | - |
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| (noun) the state of being under the control of another person | Synonyms: slavery, thraldom, thrall, thralldom |
| (noun) the state of being under the control of a force or influence or abstract power | - |
| boundary | (noun) the greatest possible degree of something | Synonyms: bound, limit |
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| (noun) the line or plane indicating the limit or extent of something | Synonyms: bound, bounds |
| (noun) a line determining the limits of an area | Synonyms: bound, edge |
| brachydactylia | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactyly |
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| brachydactyly | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactylia |
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| bradawl | (noun) an awl for making small holes for brads or small screws | Synonyms: pricker |
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| branchiopodan | (noun) aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding | Synonyms: branchiopod, branchiopod crustacean |
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| bridal | (noun) archaic terms for a wedding or wedding feast | Synonyms: espousal |
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| broadax | (noun) a large ax with a broad cutting blade | Synonyms: broadaxe |
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| broadaxe | (noun) a large ax with a broad cutting blade | Synonyms: broadax |
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| cacodaemon | (noun) an evil spirit | Synonyms: cacodemon |
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| cadaster | (noun) a public register showing the details of ownership and value of land; made for the purpose of taxation | Synonyms: cadastre |
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| cadastre | (noun) a public register showing the details of ownership and value of land; made for the purpose of taxation | Synonyms: cadaster |
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| cadaver | (noun) the dead body of a human being | Synonyms: clay, corpse, remains, stiff |
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| cadaverine | (noun) a colorless toxic ptomaine with an unpleasant odor formed during the putrefaction of animal tissue | - |
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| calendar | (noun) a list or register of events (appointments or social events or court cases etc) | - |
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| (noun) a tabular array of the days (usually for one year) | - |
| (noun) a system of timekeeping that defines the beginning and length and divisions of the year | - |
| candida | (noun) any of the yeastlike imperfect fungi of the genus Candida | - |
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| candidacy | (noun) the campaign of a candidate to be elected | Synonyms: campaigning, candidature, electioneering, political campaign |
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| candidate | (noun) someone who is considered for something (for an office or prize or honor etc.) | Synonyms: prospect |
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| (noun) a politician who is running for public office | Synonyms: campaigner, nominee |
| candidature | (noun) the campaign of a candidate to be elected | Synonyms: campaigning, candidacy, electioneering, political campaign |
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| caranda | (noun) South American palm yielding a wax similar to carnauba wax | Synonyms: caranda palm, caranday, Copernicia alba, Copernicia australis, wax palm |
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| caranday | (noun) South American palm yielding a wax similar to carnauba wax | Synonyms: caranda, caranda palm, Copernicia alba, Copernicia australis, wax palm |
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| cardamom | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamon, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamon, Elettaria cardamomum |
| cardamon | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamom, Elettaria cardamomum |
| cardamum | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamon |
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| cauda | (noun) any taillike structure | - |
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| caudate | (noun) amphibians that resemble lizards | Synonyms: urodele |
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| (noun) a tail-shaped basal ganglion located in a lateral ventricle of the brain | Synonyms: caudate nucleus |