| bequest | (noun) (law) a gift of personal property by will | Synonyms: legacy |
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| best | (noun) the supreme effort one can make | - |
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| (noun) the person who is most outstanding or excellent; someone who tops all others | Synonyms: topper |
| bestiality | (noun) sexual activity between a person and an animal | Synonyms: sodomy, zooerastia, zooerasty |
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| (noun) the stupid brutal quality of a beast | - |
| bestiary | (noun) a medieval book (usually illustrated) with allegorical and amusing descriptions of real and fabled animals | - |
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| bestowal | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowment, conferment, conferral |
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| (noun) a gift that is bestowed or conferred | Synonyms: bestowment |
| bestower | (noun) person who makes a gift of property | Synonyms: conferrer, donor, giver, presenter |
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| bestowment | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowal, conferment, conferral |
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| (noun) a gift that is bestowed or conferred | Synonyms: bestowal |
| bestseller | (noun) a book that has had a large and rapid sale | Synonyms: best seller |
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| bialystoker | (noun) flat crusty-bottomed onion roll | Synonyms: bialy |
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| bibliopolist | (noun) a dealer in secondhand books (especially rare or curious books) | Synonyms: bibliopole |
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| bibliotist | (noun) someone who engages in bibliotics | - |
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| bicyclist | (noun) a person who rides a bicycle | Synonyms: bicycler, biker, cyclist, wheeler |
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| bigamist | (noun) someone who marries one person while already legally married to another | - |
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| bilestone | (noun) a calculus formed in the gall bladder or its ducts | Synonyms: gallstone |
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| bilingualist | (noun) a person who speaks two languages fluently | Synonyms: bilingual |
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| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| bilsted | (noun) a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap | Synonyms: American sweet gum, Liquidambar styraciflua, red gum, sweet gum, sweet gum tree |
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| bimester | (noun) a period of 2 months | - |
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| bimetallist | (noun) an advocate of bimetallism | - |
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| biocatalyst | (noun) a biochemical catalyst such as an enzyme | - |
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| biochemist | (noun) someone with special training in biochemistry | - |
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| biochemistry | (noun) the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry | - |
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| biologist | (noun) (biology) a scientist who studies living organisms | Synonyms: life scientist |
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| biophysicist | (noun) a physicist who applies the methods of physics to biology | - |
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| biostatistics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometrics, biometry |
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| biosystematics | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematy |
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| biosystematy | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematics |
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| birdnest | (noun) nest where birds lay their eggs and hatch their young | Synonyms: bird's nest, bird nest |
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| birdnesting | (noun) hunting for birds' nests to get the eggs | - |
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| bister | (noun) a water-soluble brownish-yellow pigment made by boiling wood soot | Synonyms: bistre |
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| bistre | (noun) a water-soluble brownish-yellow pigment made by boiling wood soot | Synonyms: bister |
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| bistro | (noun) a small informal restaurant; serves wine | - |
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| bitstock | (noun) a carpenter's tool having a crank handle for turning and a socket to hold a bit for boring | Synonyms: brace |
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| bitumastic | (noun) a protective coating of asphalt and filter used on structural metals that are exposed to weathering | - |
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| blacklist | (noun) a list of people who are out of favor | Synonyms: black book, shitlist |
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| blast | (noun) a very long fly ball | - |
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| (noun) intense adverse criticism | Synonyms: attack, fire, flack, flak |
| (noun) an explosion (as of dynamite) | - |
| (noun) a sudden very loud noise | Synonyms: bam, bang, clap, eruption |
| (noun) a highly pleasurable or exciting experience | Synonyms: good time |
| (noun) a strong current of air | Synonyms: blow, gust |
| blastema | (noun) a mass of undifferentiated cells from which an organ or body part develops | - |
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| blaster | (noun) a workman employed to blast with explosives | Synonyms: chargeman |
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| blastocele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocoel, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoel | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoel, cleavage cavity, segmentation cavity |
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| blastocyst | (noun) the blastula of a placental mammal in which some differentiation of cells has occurred | Synonyms: blastodermic vessicle |
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| blastocyte | (noun) an undifferentiated embryonic cell | - |
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| blastocytoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastoma, embryonal carcinosarcoma |
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| blastoderm | (noun) a layer of cells on the inside of the blastula | Synonyms: blastodisc, germinal area, germinal disc |
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| blastodisc | (noun) a layer of cells on the inside of the blastula | Synonyms: blastoderm, germinal area, germinal disc |
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| blastoff | (noun) the launching of a missile or spacecraft to a specified destination | Synonyms: shot |
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| blastogenesis | (noun) theory that inherited characteristics are transmitted by germ plasm | - |
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| (noun) asexual reproduction by budding | - |
| blastoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastocytoma, embryonal carcinosarcoma |
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| blastomere | (noun) any cell resulting from cleavage of a fertilized egg | - |
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| blastomycete | (noun) any of various yeastlike budding fungi of the genus Blastomyces; cause disease in humans and other animals | - |
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| blastomycosis | (noun) any of several infections of the skin or mucous membrane caused by Blastomyces | - |
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| blastopore | (noun) the opening into the archenteron | - |
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| blastosphere | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastula |
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| blastula | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastosphere |
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| blister | (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, bulla |
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| (noun) (botany) a swelling on a plant similar to that on the skin | - |
| (noun) a flaw on a surface resulting when an applied substance does not adhere (as an air bubble in a coat of paint) | - |
| blistering | (noun) the formation of vesicles in or beneath the skin | Synonyms: vesication, vesiculation |
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| blockbuster | (noun) an unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel) | Synonyms: megahit, smash hit |
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| (noun) a large bomb used to demolish extensive areas (as a city block) | - |
| bloodlust | (noun) a desire for bloodshed | - |
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| bloodstain | (noun) a discoloration caused by blood | - |
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| bloodstock | (noun) thoroughbred horses (collectively) | - |
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| bloodstone | (noun) green chalcedony with red spots that resemble blood | Synonyms: heliotrope |
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| bloodstream | (noun) the blood flowing through the circulatory system | Synonyms: blood stream |
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| bloodthirstiness | (noun) a disposition to shed blood | Synonyms: bloodiness |
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| bluestem | (noun) tall grass with smooth bluish leaf sheaths grown for hay in the United States | Synonyms: Andropogon furcatus, Andropogon gerardii, blue stem |
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| bluestocking | (noun) a woman having literary or intellectual interests | Synonyms: bas bleu |
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| bluestone | (noun) bluish-grey sandstone used for paving and building | - |
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| bluster | (noun) a swaggering show of courage | Synonyms: bravado |
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| (noun) vain and empty boasting | Synonyms: braggadocio, rhodomontade, rodomontade |
| (noun) a violent gusty wind | - |
| (noun) noisy confusion and turbulence | - |
| blusterer | (noun) a person who causes trouble by speaking indiscreetly | Synonyms: loudmouth |
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| boast | (noun) speaking of yourself in superlatives | Synonyms: boasting, jactitation, self-praise |
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| boaster | (noun) a very boastful and talkative person | Synonyms: blowhard, braggart, bragger, line-shooter, vaunter |
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| boastfulness | (noun) outspoken conceit | Synonyms: vainglory |
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| boasting | (noun) speaking of yourself in superlatives | Synonyms: boast, jactitation, self-praise |
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| boisterousness | (noun) the property of being noisy and lively and unrestrained | - |
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| (noun) a turbulent and stormy state of the sea | - |
| bolster | (noun) a pillow that is often put across a bed underneath the regular pillows | Synonyms: long pillow |
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| bombast | (noun) pompous or pretentious talk or writing | Synonyms: blah, claptrap, fustian, rant |
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| bonavist | (noun) perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos | Synonyms: Dolichos lablab, Egyptian bean, hyacinth bean, Indian bean, Lablab purpureus |
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| bookstall | (noun) a shop where books are sold | Synonyms: bookshop, bookstore |
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| bookstore | (noun) a shop where books are sold | Synonyms: bookshop, bookstall |
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| boost | (noun) the act of giving hope or support to someone | Synonyms: encouragement |
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| (noun) the act of giving a push | - |
| (noun) an increase in cost | Synonyms: cost increase, hike, rise |
| booster | (noun) an additional dose that makes sure the first dose was effective | Synonyms: booster dose, booster shot, recall dose |
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| (noun) the first stage of a multistage rocket | Synonyms: booster rocket, booster unit, takeoff booster, takeoff rocket |
| (noun) an amplifier for restoring the strength of a transmitted signal | Synonyms: booster amplifier, booster station, relay link, relay station, relay transmitter |
| (noun) a thief who steals goods that are in a store | Synonyms: lifter, shoplifter |
| (noun) someone who is an active supporter and advocate | Synonyms: plugger, promoter |
| (noun) a person who backs a politician or a team etc. | Synonyms: admirer, champion, friend, protagonist, supporter |
| bootstrap | (noun) a strap that is looped and sewn to the top of a boot for pulling it on | - |
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| borstal | (noun) formerly a British reform school for youths considered too young to send to prison | - |
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| botanist | (noun) a biologist specializing in the study of plants | Synonyms: phytologist, plant scientist |
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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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| bowstring | (noun) the string of an archer's bow | - |
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| brachistochrone | (noun) a curve between two points along which a body can move under gravity in a shorter time than for any other curve. | - |
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| brainstem | (noun) the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus | Synonyms: brain-stem, brain stem |
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| brainstorm | (noun) the clear (and often sudden) understanding of a complex situation | Synonyms: brainwave, insight |
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| brainstorming | (noun) a group problem-solving technique in which members spontaneously share ideas and solutions | - |
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| bratwurst | (noun) a small pork sausage | Synonyms: brat |
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| breadstick | (noun) a crisp stick-shaped roll; often served with soup | Synonyms: bread-stick |
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| breadstuff | (noun) food made from dough of flour or meal and usually raised with yeast or baking powder and then baked | Synonyms: bread, staff of life |
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| (noun) flour or meal or grain used in baking bread | - |
| breakfast | (noun) the first meal of the day (usually in the morning) | - |
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| breakstone | (noun) any of various plants of the genus Saxifraga | Synonyms: rockfoil, saxifrage |
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| breast | (noun) the part of an animal's body that corresponds to a person's chest | - |
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| (noun) either of two soft fleshy milk-secreting glandular organs on the chest of a woman | Synonyms: boob, bosom, knocker, tit, titty |
| (noun) the front of the trunk from the neck to the abdomen | Synonyms: chest |
| (noun) meat carved from the breast of a fowl | Synonyms: white meat |
| breastbone | (noun) the flat bone that articulates with the clavicles and the first seven pairs of ribs | Synonyms: sternum |
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| breastpin | (noun) a decorative pin worn by women | Synonyms: broach, brooch |
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| breastplate | (noun) armor plate that protects the chest; the front part of a cuirass | Synonyms: aegis, egis |
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| breaststroke | (noun) a swimming stroke; the arms are extended together in front of the head and swept back on either side accompanied by a frog kick | - |
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