| 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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| abjection | (noun) a low or downcast state | Synonyms: abasement, degradation |
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| acatalectic | (noun) (prosody) a line of verse that has the full number of syllables | - |
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| adenoidectomy | (noun) surgical removal of the adenoids; commonly performed along with tonsillectomy | - |
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| adjective | (noun) a word that expresses an attribute of something | - |
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| (noun) the word class that qualifies nouns | - |
| adrenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: suprarenalectomy |
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| advection | (noun) (meteorology) the horizontal transfer of heat or other atmospheric properties | - |
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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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| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| affect | (noun) the conscious subjective aspect of feeling or emotion | - |
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| affectation | (noun) a deliberate pretense or exaggerated display | Synonyms: affectedness, mannerism, pose |
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| affectedness | (noun) a deliberate pretense or exaggerated display | Synonyms: affectation, mannerism, pose |
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| (noun) the quality of being false or artificial (as to impress others) | - |
| affection | (noun) a positive feeling of liking | Synonyms: affectionateness, fondness, heart, philia, tenderness, warmheartedness, warmness |
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| affectionateness | (noun) a quality proceeding from feelings of affection or love | Synonyms: fondness, lovingness, warmth |
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| (noun) a positive feeling of liking | Synonyms: affection, fondness, heart, philia, tenderness, warmheartedness, warmness |
| afterdeck | (noun) a deck abaft of midships | - |
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| aftereffect | (noun) any result that follows its cause after an interval | - |
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| (noun) a delayed effect of a drug or therapy | - |
| afterpiece | (noun) a brief dramatic piece (usually comic) presented after a play | - |
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| alecost | (noun) tansy-scented Eurasian perennial herb with buttonlike yellow flowers; used as potherb or salad green and sometimes for potpourri or tea or flavoring; sometimes placed in genus Chrysanthemum | Synonyms: balsam herb, bible leaf, Chrysanthemum balsamita, costmary, mint geranium, Tanacetum balsamita |
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| 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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| altarpiece | (noun) a painted or carved screen placed above and behind an altar or communion table | Synonyms: reredos |
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| analecta | (noun) a collection of excerpts from a literary work | Synonyms: analects |
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| analects | (noun) a collection of excerpts from a literary work | Synonyms: analecta |
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| androecium | (noun) a male gametoecium | - |
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| anecdotalism | (noun) The property of being related to short accounts of real incidents or persons, often humorous or interesting. | - |
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| anecdote | (noun) short account of an incident (especially a biographical one) | - |
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| anecdotist | (noun) a person skilled in telling anecdotes | Synonyms: raconteur |
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| angiotelectasia | (noun) dilation and enlargement of arterioles | - |
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| angrecum | (noun) any of various spectacular orchids of the genus Angraecum having dark green leathery leaves and usually nocturnally scented white or ivory flowers | - |
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| anorectic | (noun) a person suffering from anorexia nervosa | Synonyms: anorexic |
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| antecedence | (noun) preceding in time | Synonyms: antecedency, anteriority, precedence, precedency, priority |
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| antecedency | (noun) preceding in time | Synonyms: antecedence, anteriority, precedence, precedency, priority |
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| antecedent | (noun) the referent of an anaphor; a phrase or clause that is referred to by an anaphoric pronoun | - |
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| (noun) a preceding occurrence or cause or event | - |
| (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, ascendant, ascendent, root |
| (noun) anything that precedes something similar in time | Synonyms: forerunner |
| antechamber | (noun) a large entrance or reception room or area | Synonyms: anteroom, entrance hall, foyer, hall, lobby, vestibule |
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| antielectron | (noun) an elementary particle with positive charge; interaction of a positron and an electron results in annihilation | Synonyms: positron |
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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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| 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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| 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' | - |
| 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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| arccosecant | (noun) the angle that has a cosecant equal to a given number | Synonyms: arc cosecant, inverse cosecant |
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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 | - |
| arcsec | (noun) the inverse function of the secant; the angle that has a secant equal to a given number | Synonyms: arc secant, arcsecant, inverse secant |
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| arcsecant | (noun) the inverse function of the secant; the angle that has a secant equal to a given number | Synonyms: arc secant, arcsec, inverse secant |
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| arcsecond | (noun) a 60th part of a minute of arc | Synonyms: second |
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| areca | (noun) any of several tall tropical palms native to southeastern Asia having egg-shaped nuts | - |
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| arteriectasia | (noun) an abnormal distension of an artery | Synonyms: arteriectasis |
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| arteriectasis | (noun) an abnormal distension of an artery | Synonyms: arteriectasia |
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| aspect | (noun) the feelings expressed on a person's face | Synonyms: expression, face, facial expression, look |
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| (noun) a characteristic to be considered | - |
| (noun) a distinct feature or element in a problem | Synonyms: facet |
| (noun) the visual percept of a region | Synonyms: panorama, prospect, scene, view, vista |
| (noun) the beginning or duration or completion or repetition of the action of a verb | - |
| atelectasis | (noun) collapse of an expanded lung (especially in infants); also failure of pulmonary alveoli to expand at birth | - |
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| attosecond | (noun) one quintillionth (10^-18) of a second; one thousandth of a femtosecond | - |
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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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| autocorrect | (noun) a system for automatically correcting text | - |
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| autoinjector | (noun) a hypodermic syringe to use in injecting yourself with a liquid | - |
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| barbecue | (noun) a rack to hold meat for cooking over hot charcoal usually out of doors | Synonyms: barbeque |
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| (noun) a cookout in which food is cooked over an open fire; especially a whole animal carcass roasted on a spit | Synonyms: barbeque |
| (noun) meat that has been barbecued or grilled in a highly seasoned sauce | Synonyms: barbeque |
| barbecuing | (noun) roasting a large piece of meat on a revolving spit out of doors over an open fire | - |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| bechamel | (noun) milk thickened with a butter and flour roux | Synonyms: bechamel sauce, white sauce |
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| beck | (noun) a beckoning gesture | - |
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| becket | (noun) (nautical) a short line with an eye at one end and a knot at the other; used to secure loose items on a ship | - |
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| becomingness | (noun) the quality of being becoming | - |
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| beech | (noun) any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions | Synonyms: beech tree |
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| (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beechwood |
| beechnut | (noun) small sweet triangular nut of any of various beech trees | - |
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| beechwood | (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beech |
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| beseechingness | (noun) The state or quality of one who begs or implores. | - |
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| bibliothec | (noun) a professional person trained in library science and engaged in library services | Synonyms: librarian |
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| bibliotheca | (noun) a collection of books | - |
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| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| biotech | (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotechnology |
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| biotechnology | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: bioengineering, ergonomics |
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| (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotech |
| bisection | (noun) dividing into two equal parts | - |
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| bluecoat | (noun) a person dressed all in blue (as a soldier or sailor) | - |
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| borecole | (noun) a hardy cabbage with coarse curly leaves that do not form a head | Synonyms: Brassica oleracea acephala, cole, colewort, kail, kale |
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| bottlecap | (noun) a cap that seals a bottle | - |
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| bottleneck | (noun) the narrow part of a bottle near the top | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: chokepoint, constriction |
| breccia | (noun) a rudaceous rock consisting of sharp fragments embedded in clay or sand | - |
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| breech | (noun) opening in the rear of the barrel of a gun where bullets can be loaded | Synonyms: rear of barrel, rear of tube |
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| breechblock | (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing | Synonyms: breech closer |
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| breechcloth | (noun) a garment that provides covering for the loins | Synonyms: breechclout, loincloth |
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| breechclout | (noun) a garment that provides covering for the loins | Synonyms: breechcloth, loincloth |
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| breeches | (noun) (used in the plural) trousers ending above the knee | Synonyms: knee breeches, knee pants, knickerbockers, knickers |
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| breechloader | (noun) a gun that is loaded at the breech | - |
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| bridecake | (noun) a rich cake with two or more tiers and covered with frosting and decorations; served at a wedding reception | Synonyms: wedding cake |
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| caecilian | (noun) any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions | Synonyms: blindworm |
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| caecum | (noun) the cavity in which the large intestine begins and into which the ileum opens | Synonyms: blind gut, cecum |
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| caleche | (noun) the folding hood of a horse-drawn carriage | Synonyms: calash, calash top |
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| (noun) a woman's large folded hooped hood; worn in the 18th century | Synonyms: calash |
| callosectomy | (noun) severing the corpus callosum so that communication between the cerebral hemispheres is interrupted (in cases of severe intractable epilepsy) | Synonyms: callosotomy |
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| canecutter | (noun) a wood rabbit of southeastern United States swamps and lowlands | Synonyms: swamp hare, swamp rabbit, Sylvilagus aquaticus |
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| catalectic | (noun) (prosody) a line of verse that lacks a syllable in the last metrical foot | - |
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| catechesis | (noun) oral religious instruction (as before baptism or confirmation) | - |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechism | (noun) an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
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| (noun) a series of questions put to an individual (such as a political candidate) to elicit their views | - |
| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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