| abandon | (noun) the trait of lacking restraint or control; reckless freedom from inhibition or worry | Synonyms: unconstraint, wantonness |
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| (noun) a feeling of extreme emotional intensity | Synonyms: wildness |
| abandonment | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: defection, desertion |
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| (noun) the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away | - |
| (noun) the act of giving something up | Synonyms: desertion, forsaking |
| abdomen | (noun) the region of the body of a vertebrate between the thorax and the pelvis | Synonyms: belly, stomach, venter |
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| (noun) the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm | Synonyms: abdominal cavity |
| abdominal | (noun) the muscles of the abdomen | Synonyms: ab, abdominal muscle |
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| abdominocentesis | (noun) centesis of the belly to remove fluid for diagnosis | Synonyms: paracentesis |
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| abdominoplasty | (noun) cosmetic surgery of the abdomen to remove wrinkles and tighten the skin over the stomach | Synonyms: tummy tuck |
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| abdominousness | (noun) the bodily property of a protruding belly | Synonyms: paunchiness |
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| accelerando | (noun) a gradually increasing tempo of music | - |
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| acetaldol | (noun) unsaturated aldol | - |
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| 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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| acrodont | (noun) an animal having teeth consolidated with the summit of the alveolar ridge without sockets | - |
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| ado | (noun) a rapid active commotion | Synonyms: bustle, flurry, fuss, hustle, stir |
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| adobe | (noun) sun-dried brick; used in hot dry climates | Synonyms: adobe brick |
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| (noun) the clay from which adobe bricks are made | - |
| adobo | (noun) a dish of marinated vegetables and meat or fish; served with rice | - |
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| adolescence | (noun) in the state that someone is in between puberty and adulthood | - |
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| (noun) the time period between the beginning of puberty and adulthood | - |
| adolescent | (noun) a juvenile between the onset of puberty and maturity | Synonyms: stripling, teen, teenager |
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| adonis | (noun) any handsome young man | - |
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| adoptee | (noun) someone (such as a child) who has been adopted | - |
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| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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| adoption | (noun) the act of accepting with approval; favorable reception | Synonyms: acceptance, acceptation, espousal |
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| (noun) the appropriation (of ideas or words etc) from another source | Synonyms: borrowing |
| (noun) a legal proceeding that creates a parent-child relation between persons not related by blood; the adopted child is entitled to all privileges belonging to a natural child of the adoptive parents (including the right to inherit) | - |
| adorability | (noun) extreme attractiveness | Synonyms: adorableness |
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| adorableness | (noun) extreme attractiveness | Synonyms: adorability |
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| adoration | (noun) the act of admiring strongly | Synonyms: idolisation, idolization |
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| (noun) the worship given to God alone | Synonyms: latria |
| (noun) a feeling of profound love and admiration | Synonyms: worship |
| adorer | (noun) someone who admires a young woman | Synonyms: admirer |
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| adornment | (noun) the action of decorating yourself with something colorful and interesting | - |
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| (noun) a decoration of color or interest that is added to relieve plainness | - |
| adoxography | (noun) fine writing in praise of trivial or base subjects | - |
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| aerodontalgia | (noun) pain in the teeth that results from a change in air pressure (as in flying or mountain climbing) | - |
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| aficionado | (noun) a serious devotee of some particular music genre or musical performer | - |
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| (noun) a fan of bull fighting | - |
| aikido | (noun) a Japanese martial art employing principles similar to judo | - |
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| airdock | (noun) a large structure at an airport where aircraft can be stored and maintained | Synonyms: hangar, repair shed |
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| albedo | (noun) the ratio of reflected to incident light | Synonyms: reflective power |
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| aldohexose | (noun) a monosaccharide sugar having six carbon atoms and an aldehyde group | - |
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| aldol | (noun) an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde; contains an alcohol group (-OH) and an aldehyde group (-CHO) | Synonyms: aldehyde-alcohol |
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| aldose | (noun) a monosaccharide sugar that contains the aldehyde group or is hemiacetal | - |
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| aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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| aldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: hyperaldosteronism |
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| aldotetrose | (noun) A four-carbon aldose; for example, threose, erythrose. | - |
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| aldotriose | (noun) Any aldose having three carbon atoms; in reality, just glyceraldehyde. | - |
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| ambassador | (noun) a diplomat of the highest rank; accredited as representative from one country to another | Synonyms: embassador |
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| (noun) an informal representative | - |
| ambassadorship | (noun) the post of ambassador | - |
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| amidopyrine | (noun) a white crystalline substance used as an analgesic and antipyretic | Synonyms: aminopyrine |
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| amyloidosis | (noun) a disorder characterized by deposit of amyloid in organs or tissues; often secondary to chronic rheumatoid arthritis or tuberculosis or multiple myeloma | - |
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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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| angledozer | (noun) a bulldozer with an angled moldboard to push earth to one side | - |
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| anhedonia | (noun) an inability to experience pleasure | - |
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| antidote | (noun) a remedy that stops or controls the effects of a poison | Synonyms: counterpoison |
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| ardor | (noun) intense feeling of love | Synonyms: ardour |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardour, elan, zeal |
| (noun) feelings of great warmth and intensity | Synonyms: ardour, fervency, fervidness, fervor, fervour, fire |
| ardour | (noun) intense feeling of love | Synonyms: ardor |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardor, elan, zeal |
| (noun) feelings of great warmth and intensity | Synonyms: ardor, fervency, fervidness, fervor, fervour, fire |
| astrodome | (noun) a transparent dome on top of an airplane where the navigator can make celestial observations | - |
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| avocado | (noun) a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed | Synonyms: aguacate, alligator pear, avocado pear |
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| (noun) tropical American tree bearing large pulpy green fruits | Synonyms: avocado tree, Persea Americana |
| backdoor | (noun) a secret or underhand means of access (to a place or a position) | Synonyms: back door |
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| (noun) an entrance at the rear of a building | Synonyms: back door, back entrance |
| (noun) an undocumented way to get access to a computer system or the data it contains | Synonyms: back door |
| backdown | (noun) a retraction of a previously held position | Synonyms: climb-down, withdrawal |
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| bandoleer | (noun) a broad cartridge belt worn over the shoulder by soldiers | Synonyms: bandolier |
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| bandolier | (noun) a broad cartridge belt worn over the shoulder by soldiers | Synonyms: bandoleer |
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| bandoneon | (noun) a type of concertina popular in South America | - |
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| bardolatry | (noun) the idolization of William Shakespeare | - |
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| barndoor | (noun) an opaque adjustable flap on a lamp fixture; used in photography to cut off light from particular areas | - |
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| bastinado | (noun) a form of torture in which the soles of the feet are beaten with whips or cudgels | Synonyms: falanga |
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| (noun) a cudgel used to give someone a beating on the soles of the feet | - |
| battledore | (noun) an ancient racket game | Synonyms: battledore and shuttlecock |
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| (noun) a light long-handled racket used by badminton players | Synonyms: badminton racket, badminton racquet |
| belladonna | (noun) an alkaloidal extract or tincture of the poisonous belladonna plant that is used medicinally | - |
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| (noun) perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine | Synonyms: Atropa belladonna, belladonna plant, deadly nightshade |
| bombardon | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombard |
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| (noun) a tuba that coils over the shoulder of the musician | Synonyms: helicon |
| boondocks | (noun) a remote and undeveloped area | Synonyms: back country, backwoods, hinterland |
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| boondoggle | (noun) work of little or no value done merely to look busy | - |
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| boredom | (noun) the feeling of being bored by something tedious | Synonyms: ennui, tedium |
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| boudoir | (noun) a lady's bedroom or private sitting room | - |
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| bourdon | (noun) a pipe of the bagpipe that is tuned to produce a single continuous tone | Synonyms: drone, drone pipe |
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| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| braggadocio | (noun) vain and empty boasting | Synonyms: bluster, rhodomontade, rodomontade |
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| bravado | (noun) a swaggering show of courage | Synonyms: bluster |
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| breakdown | (noun) the act of disrupting an established order so it fails to continue | Synonyms: dislocation |
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| (noun) an analysis into mutually exclusive categories | Synonyms: partitioning |
| (noun) a cessation of normal operation | Synonyms: equipment failure |
| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: decomposition, putrefaction, rot, rotting |
| (noun) (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance | Synonyms: chemical decomposition reaction, decomposition, decomposition reaction |
| (noun) a mental or physical breakdown | Synonyms: crack-up |
| bridoon | (noun) a bit resembling a snaffle bit; used with a separate curb | - |
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| bulldog | (noun) a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting | Synonyms: English bulldog |
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| bulldozer | (noun) large powerful tractor; a large blade in front flattens areas of ground | Synonyms: dozer |
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| burdock | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: clotbur |
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| calcedony | (noun) a milky or greyish translucent to transparent quartz | Synonyms: chalcedony |
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| candor | (noun) the quality of being honest and straightforward in attitude and speech | Synonyms: candidness, candour, directness, forthrightness, frankness |
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| (noun) ability to make judgments free from discrimination or dishonesty | Synonyms: candour, fair-mindedness, fairness |
| candour | (noun) the quality of being honest and straightforward in attitude and speech | Synonyms: candidness, candor, directness, forthrightness, frankness |
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| (noun) ability to make judgments free from discrimination or dishonesty | Synonyms: candor, fair-mindedness, fairness |
| carbonado | (noun) a piece of meat (or fish) that has been scored and broiled | - |
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| (noun) an inferior dark diamond used in industry for drilling and polishing | Synonyms: black diamond |
| cardoon | (noun) only parts eaten are roots and especially stalks (blanched and used as celery); related to artichokes | - |
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| (noun) southern European plant having spiny leaves and purple flowers cultivated for its edible leafstalks and roots | Synonyms: Cynara cardunculus |
| chador | (noun) a cloth used as a head covering (and veil and shawl) by Muslim and Hindu women | Synonyms: chadar, chaddar, chuddar |
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| chaetodon | (noun) any fish of the genus Chaetodon | - |
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| chalcedony | (noun) a milky or greyish translucent to transparent quartz | Synonyms: calcedony |
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| chlamydospore | (noun) thick-walled asexual resting spore of certain fungi and algae | - |
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| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| chordomesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordamesoderm |
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| chordophone | (noun) a stringed instrument of the group including harps, lutes, lyres, and zithers | - |
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| cladode | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladophyll, phylloclad, phylloclade |
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| cladogram | (noun) a tree diagram used to illustrate phylogenetic relationships | - |
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| cladophyll | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladode, phylloclad, phylloclade |
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| clampdown | (noun) sudden restriction on an activity | - |
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| closedown | (noun) termination of operations | Synonyms: closing, closure, shutdown |
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| coccidioidomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidiomycosis, desert rheumatism, valley fever |
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| codon | (noun) a specific sequence of three adjacent nucleotides on a strand of DNA or RNA that specifies the genetic code information for synthesizing a particular amino acid | - |
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| comedo | (noun) a black-tipped plug clogging a pore of the skin | Synonyms: blackhead |
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| comedogen | (noun) A substance that tends to produce acne, such as by clogging pores on the skin. | Synonyms: comedogenic, comedogenic substance |
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