| blamelessly | (adverb) in an irreproachable and blameless manner | Synonyms: irreproachably |
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| blamelessness | (noun) a state of innocence | Synonyms: guiltlessness, inculpability, inculpableness |
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| blameworthiness | (noun) a state of guilt | Synonyms: culpability, culpableness |
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| blameworthy | (adjective) deserving blame or censure as being wrong or evil or injurious | Synonyms: blamable, blameable, blameful, censurable, culpable |
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| blandishment | (noun) the act of urging by means of teasing or flattery | Synonyms: wheedling |
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| (noun) flattery intended to persuade | Synonyms: cajolery, palaver |
| blaspheme | (verb) utter obscenities or profanities | Synonyms: curse, cuss, imprecate, swear |
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| (verb) speak of in an irreverent or impious manner | - |
| blasphemer | (noun) a person who speaks disrespectfully of sacred things | - |
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| blastomere | (noun) any cell resulting from cleavage of a fertilized egg | - |
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| blastomeric | (adjective) of or relating to a blastomere | - |
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| blithesome | (adjective) carefree and happy and lighthearted | Synonyms: blithe, light-hearted, lighthearted, lightsome |
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| bloomer | (noun) an embarrassing mistake | Synonyms: blooper, blunder, boner, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall |
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| (noun) a flower that blooms in a particular way | - |
| bloomers | (noun) (used in the plural) underpants worn by women | Synonyms: drawers, knickers, pants |
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| bolometer | (noun) an instrument that measures heat radiation; extremely sensitive | - |
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| bolometric | (adjective) of or relating to a bolometer | - |
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| bombardment | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, shelling |
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| (noun) an attack by dropping bombs | Synonyms: bombing |
| (noun) the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | - |
| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, onslaught, outpouring |
| bonemeal | (noun) fertilizer made of ground bones | - |
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| boomer | (noun) a member of the baby boom generation in the 1950s | Synonyms: baby boomer |
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| boomerang | (noun) a miscalculation that recoils on its maker | Synonyms: backfire |
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| (noun) a curved piece of wood; when properly thrown will return to thrower | Synonyms: throw stick, throwing stick |
| (verb) return to the initial position from where it came; like a boomerang | - |
| bosomed | (adjective) having a bosom as specified or having something likened to a bosom; usually used in compounds | - |
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| bothersome | (adjective) causing irritation or annoyance | Synonyms: annoying, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexatious, vexing |
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| bottomed | (adjective) having a bottom of a specified character | - |
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| brome | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: bromegrass |
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| bromegrass | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: brome |
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| bromeosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: eosin |
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| brooklime | (noun) plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers | Synonyms: American brooklime, Veronica americana |
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| (noun) European plant having low-lying stems with blue flowers; sparsely naturalized in North America | Synonyms: European brooklime, Veronica beccabunga |
| bummer | (noun) an experience that is irritating or frustrating or disappointing | - |
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| (noun) a bad reaction to a hallucinogenic drug | - |
| bunglesome | (adjective) difficult to handle or manage especially because of shape | Synonyms: awkward, clumsy, ungainly |
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| burdensome | (adjective) not easily borne; wearing | Synonyms: onerous, taxing |
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| burdensomeness | (noun) unwelcome burdensome difficulty | Synonyms: heaviness, onerousness, oppressiveness |
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| businessmen | (noun) the body of individuals who manage businesses | Synonyms: business community |
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| byname | (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: cognomen, moniker, nickname, sobriquet, soubriquet |
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| calomel | (noun) a tasteless colorless powder used medicinally as a cathartic | Synonyms: mercurous chloride |
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| calorimeter | (noun) a measuring instrument that determines quantities of heat | - |
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| calorimetric | (adjective) of or relating to the measurement of heat | - |
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| calorimetry | (noun) measurement of quantities of heat | - |
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| calumet | (noun) a highly decorated ceremonial pipe of Amerindians; smoked on ceremonial occasions (especially as a token of peace) | Synonyms: peace pipe, pipe of peace |
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| camel | (noun) cud-chewing mammal used as a draft or saddle animal in desert regions | - |
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| camelhair | (noun) a soft tan cloth made with the hair of a camel | Synonyms: camel's hair |
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| camelia | (noun) any of several shrubs or small evergreen trees having solitary white or pink or reddish flowers | Synonyms: camellia |
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| camellia | (noun) any of several shrubs or small evergreen trees having solitary white or pink or reddish flowers | Synonyms: camelia |
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| camelopard | (noun) tallest living quadruped; having a spotted coat and small horns and very long neck and legs; of savannahs of tropical Africa | Synonyms: Giraffa camelopardalis, giraffe |
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| camelpox | (noun) a viral disease of camels closely related to smallpox | - |
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| cameo | (noun) engraving or carving in low relief on a stone (as in a brooch or ring) | - |
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| camera | (noun) equipment for taking photographs (usually consisting of a lightproof box with a lens at one end and light-sensitive film at the other) | Synonyms: photographic camera |
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| (noun) television equipment consisting of a lens system that focuses an image on a photosensitive mosaic that is scanned by an electron beam | Synonyms: television camera, tv camera |
| cameraman | (noun) a photographer who operates a movie camera | Synonyms: camera operator, cinematographer |
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| cantonment | (noun) temporary living quarters specially built by the army for soldiers | Synonyms: bivouac, camp, encampment |
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| caramel | (adjective) having the color of caramel; of a moderate yellow-brown | Synonyms: caramel brown |
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| (noun) a medium to dark tan color | Synonyms: buff, caramel brown, raw sienna, yellowish brown |
| (noun) firm chewy candy made from caramelized sugar and butter and milk | - |
| (noun) burnt sugar; used to color and flavor food | Synonyms: caramelized sugar |
| caramelise | (verb) convert to caramel | Synonyms: caramelize |
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| (verb) be converted into caramel | Synonyms: caramelize |
| caramelize | (verb) convert to caramel | Synonyms: caramelise |
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| (verb) be converted into caramel | Synonyms: caramelise |
| cardiomegaly | (noun) an abnormal enlargement of the heart | Synonyms: enlarged heart, megacardia, megalocardia |
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| casement | (noun) a window sash that is hinged (usually on one side) | - |
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| cashmere | (noun) a soft fabric made from the wool of the Cashmere goat | - |
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| (noun) the wool of the Kashmir goat | - |
| catamenia | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: flow, menses, menstruation, menstruum, period |
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| catamenial | (adjective) of or relating to menstruation or the menses | Synonyms: menstrual |
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| catchment | (noun) a structure in which water is collected (especially a natural drainage area) | - |
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| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| categoreme | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categorem |
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| cefotaxime | (noun) a parenteral cephalosporin (trade name Claforan) used for severe infections of the lungs or throat or ears or urinary tract | Synonyms: Claforan |
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| ceftazidime | (noun) a parenteral cephalosporin (trade names Fortaz and Tazicef) used to treat moderate infections | Synonyms: Fortaz, Tazicef |
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| cefuroxime | (noun) a cephalosporin that can be given parenterally (trade name Zinacef) or orally by tablets (trade name Ceftin); indicated for infections of the lungs or throat or ears or urinary tract or meninges | Synonyms: Ceftin, Zinacef |
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| cement | (noun) a specialized bony substance covering the root of a tooth | Synonyms: cementum |
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| (noun) a building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar | - |
| (noun) something that hardens to act as adhesive material | - |
| (noun) concrete pavement is sometimes referred to as cement | - |
| (noun) any of various materials used by dentists to fill cavities in teeth | - |
| (verb) bind or join with or as if with cement | - |
| (verb) make fast as if with cement | - |
| (verb) cover or coat with cement | - |
| cementite | (noun) a chemical compound that is a constituent of steel and cast iron; very hard and brittle | Synonyms: iron carbide |
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| cementitious | (adjective) like or relevant to or having the properties of cement | - |
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| cementum | (noun) a specialized bony substance covering the root of a tooth | Synonyms: cement |
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| cemetery | (noun) a tract of land used for burials | Synonyms: burial ground, burial site, burying ground, graveyard, memorial park, necropolis |
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| centime | (noun) a coin worth one-hundredth of the value of the basic unit | Synonyms: cent, penny |
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| (noun) a fractional monetary unit of several countries: France and Algeria and Belgium and Burkina Faso and Burundi and Cameroon and Chad and the Congo and Gabon and Haiti and the Ivory Coast and Luxembourg and Mali and Morocco and Niger and Rwanda and Senegal and Switzerland and Togo | - |
| centimeter | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimetre, cm |
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| centimetre | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimeter, cm |
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| centromere | (noun) a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape | Synonyms: kinetochore |
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| centromeric | (adjective) pertaining to the dense specialized portion of a chromosome to which the spindle attaches during mitosis | - |
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| centrosome | (noun) small region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules | Synonyms: central body |
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| centrosymmetric | (adjective) having a symmetrical arrangement of radiating parts about a central point | Synonyms: radially symmetrical |
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| cephalometry | (noun) measurement of human heads | - |
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| cerebromeningitis | (noun) inflammation of the brain and spinal cord and their meninges | Synonyms: encephalomeningitis, meningoencephalitis |
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| cerement | (noun) burial garment in which a corpse is wrapped | Synonyms: pall, shroud, winding-clothes, winding-sheet |
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| cerumen | (noun) a soft yellow wax secreted by glands in the ear canal | Synonyms: earwax |
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| chameleon | (noun) lizard of Africa and Madagascar able to change skin color and having a projectile tongue | Synonyms: chamaeleon |
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| (noun) a changeable or inconstant person | - |
| charmed | (adjective) filled with wonder and delight | Synonyms: beguiled, captivated, delighted, enthralled, entranced |
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| (adjective) strongly attracted | Synonyms: captivated |
| charmer | (noun) a person who charms others (usually by personal attractiveness) | Synonyms: beguiler |
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| (noun) someone with an assured and ingratiating manner | Synonyms: smoothie, smoothy, sweet talker |
| chastisement | (noun) verbal punishment | Synonyms: castigation |
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| (noun) a rebuke for making a mistake | Synonyms: chastening, correction |
| chime | (noun) a percussion instrument consisting of a set of tuned bells that are struck with a hammer; used as an orchestral instrument | Synonyms: bell, gong |
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| (verb) emit a sound | - |
| chimer | (noun) a fur-lined coat decorated with braid, worn in the sixteenth century. | Synonyms: chamarre, simarre |
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| chimera | (noun) a grotesque product of the imagination | Synonyms: chimaera |
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| chimeral | (adjective) being or relating to or like a chimera | Synonyms: chimeric, chimerical |
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| chimeric | (adjective) being or relating to or like a chimera | Synonyms: chimeral, chimerical |
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| chimerical | (adjective) being or relating to or like a chimera | Synonyms: chimeral, chimeric |
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| (adjective) produced by a wildly fanciful imagination | - |
| chondriosome | (noun) an organelle containing enzymes responsible for producing energy | Synonyms: mitochondrion |
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| chordamesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordomesoderm |
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| chordomesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordamesoderm |
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| choriomeningitis | (noun) a cerebral meningitis with cellular infiltration of the meninges | - |
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| chrome | (noun) another word for chromium when it is used in dyes or pigments | - |
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| (verb) treat with a chromium compound | - |
| (verb) plate with chromium | Synonyms: chromium-plate |
| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| chromosome | (noun) a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order | - |
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| chronometer | (noun) an accurate clock (especially used in navigation) | - |
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| chrysomelid | (noun) brightly colored beetle that feeds on plant leaves; larvae infest roots and stems | Synonyms: leaf beetle |
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| chyme | (noun) a semiliquid mass of partially digested food that passes from the stomach through the pyloric sphincter into the duodenum | - |
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| cimetidine | (noun) a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid | Synonyms: Tagamet |
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| cinnamene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: phenylethylene, styrene, vinylbenzene |
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| clawhammer | (noun) a hammer with a cleft at one end for pulling nails | Synonyms: carpenter's hammer, claw hammer |
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| clemency | (noun) leniency and compassion shown toward offenders by a person or agency charged with administering justice | Synonyms: mercifulness, mercy |
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| (noun) good weather with comfortable temperatures | Synonyms: mildness |