| brooder | (noun) apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants | Synonyms: incubator |
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| brooding | (noun) persistent morbid meditation on a problem | Synonyms: pensiveness |
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| (noun) sitting on eggs so as to hatch them by the warmth of the body | Synonyms: incubation |
| broodmare | (noun) a female horse used for breeding | Synonyms: stud mare |
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| broody | (noun) a domestic hen ready to brood | Synonyms: brood hen, broody hen, setting hen, sitter |
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| brotherhood | (noun) the feeling that men should treat one another like brothers | - |
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| (noun) people engaged in a particular occupation | Synonyms: fraternity, sodality |
| (noun) an organization of employees formed to bargain with the employer | Synonyms: labor union, trade union, trades union, union |
| (noun) the kinship relation between a male offspring and the siblings | - |
| brushwood | (noun) a dense growth of bushes | Synonyms: brush, coppice, copse, thicket |
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| (noun) the wood from bushes or small branches | - |
| busybody | (noun) a person who meddles in the affairs of others | Synonyms: nosey-parker, nosy-parker, quidnunc |
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| buttonwood | (noun) very large spreading plane tree of eastern and central North America to Mexico | Synonyms: American plane, American sycamore, Platanus occidentalis |
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| byproduct | (noun) a product made during the manufacture of something else | Synonyms: by-product, spin-off |
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| (noun) a secondary and sometimes unexpected consequence | Synonyms: by-product |
| caboodle | (noun) any collection in its entirety | Synonyms: bunch, lot |
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| cacodaemon | (noun) an evil spirit | Synonyms: cacodemon |
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| cacodemon | (noun) an evil spirit | Synonyms: cacodaemon |
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| cacodyl | (noun) the univalent group derived from arsine | Synonyms: arsenic group, cacodyl group, cacodyl radical |
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| (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: tetramethyldiarsine |
| camwood | (noun) small shrubby African tree with hard wood used as a dyewood yielding a red dye | Synonyms: African sandalwood, Baphia nitida |
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| candlewood | (noun) any of several resinous trees or shrubs often burned for light | - |
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| cathode | (noun) a negatively charged electrode that is the source of electrons entering an electrical device | - |
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| (noun) the positively charged terminal of a voltaic cell or storage battery that supplies current | - |
| cedarwood | (noun) durable aromatic wood of any of numerous cedar trees; especially wood of the red cedar often used for cedar chests | Synonyms: cedar |
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| cephalopod | (noun) marine mollusk characterized by well-developed head and eyes and sucker-bearing tentacles | Synonyms: cephalopod mollusk |
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| ceratodus | (noun) extinct lungfish | - |
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| cestode | (noun) ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates | Synonyms: tapeworm |
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| chaetodon | (noun) any fish of the genus Chaetodon | - |
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| childhood | (noun) the state of a child between infancy and adolescence | Synonyms: puerility |
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| (noun) the time of person's life when they are a child | - |
| chiropodist | (noun) a specialist in care for the feet | Synonyms: foot doctor, podiatrist |
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| chiropody | (noun) the branch of medicine concerned with the feet | Synonyms: podiatry |
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| chittamwood | (noun) deciduous tree of southeastern United States and Mexico | Synonyms: black haw, Bumelia lanuginosa, chittimwood, false buckthorn, shittimwood |
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| (noun) shrubby tree of the Pacific coast of the United States; yields cascara sagrada | Synonyms: bearberry, bearwood, cascara buckthorn, chittimwood, Rhamnus purshianus |
| (noun) shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke | Synonyms: American smokewood, Cotinus americanus, Cotinus obovatus |
| chittimwood | (noun) deciduous tree of southeastern United States and Mexico | Synonyms: black haw, Bumelia lanuginosa, chittamwood, false buckthorn, shittimwood |
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| (noun) shrubby tree of the Pacific coast of the United States; yields cascara sagrada | Synonyms: bearberry, bearwood, cascara buckthorn, chittamwood, Rhamnus purshianus |
| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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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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| chyloderma | (noun) swelling of the scrotum resulting from chronic lymphatic obstruction | Synonyms: elephantiasis scroti |
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| citronwood | (noun) wood of a citron tree | - |
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| (noun) durable fragrant wood; used in building (as in the roof of the cathedral at Cordova, Spain) | Synonyms: sandarac |
| cladode | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladophyll, phylloclad, phylloclade |
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| clinodactyly | (noun) a congenital defect in which one or more toes or fingers are abnormally positioned | - |
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| clod | (noun) a compact mass | Synonyms: ball, chunk, clump, glob, lump |
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| (noun) an awkward stupid person | Synonyms: gawk, goon, lout, lubber, lummox, lump, oaf, stumblebum |
| clodhopper | (noun) a thick and heavy shoe | Synonyms: brogan, brogue, work shoe |
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| cocoswood | (noun) wood of the granadilla tree used for making musical instruments especially clarinets | Synonyms: cocuswood, granadilla wood |
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| cocuswood | (noun) wood of the granadilla tree used for making musical instruments especially clarinets | Synonyms: cocoswood, granadilla wood |
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| cod | (noun) major food fish of Arctic and cold-temperate waters | Synonyms: codfish |
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| (noun) lean white flesh of important North Atlantic food fish; usually baked or poached | Synonyms: codfish |
| (noun) the vessel that contains the seeds of a plant (not the seeds themselves) | Synonyms: pod, seedcase |
| coda | (noun) the closing section of a musical composition | Synonyms: finale |
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| coddler | (noun) someone who pampers or spoils by excessive indulgence | Synonyms: mollycoddler, pamperer, spoiler |
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| code | (noun) a coding system used for transmitting messages requiring brevity or secrecy | - |
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| (noun) a set of rules or principles or laws (especially written ones) | Synonyms: codification |
| (noun) (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions | Synonyms: computer code |
| (noun) a series of letters, numbers or symbols assigned to something for the purpose of classification or identification | - |
| codefendant | (noun) a defendant who has been joined together with one or more other defendants in a single action | Synonyms: co-defendant |
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| codeine | (noun) derivative of opium; used as an antitussive (to relieve coughing) and an analgesic (to relieve pain) | - |
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| coder | (noun) a person who designs and writes and tests computer programs | Synonyms: computer programmer, programmer, software engineer |
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| codetalker | (noun) a secret agent who was one of the Navajos who devised and used a code based on their native language; the code was unbroken by the Japanese during World War II | Synonyms: windtalker |
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| codex | (noun) an unbound manuscript of some ancient classic (as distinguished from a scroll) | Synonyms: leaf-book |
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| (noun) an official list of chemicals or medicines etc. | - |
| codfish | (noun) major food fish of Arctic and cold-temperate waters | Synonyms: cod |
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| (noun) lean white flesh of important North Atlantic food fish; usually baked or poached | Synonyms: cod |
| codger | (noun) used affectionately to refer to an eccentric but amusing old man | Synonyms: old codger |
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| codicil | (noun) a supplement to a will; a testamentary instrument intended to alter an already executed will | - |
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| codification | (noun) the act of codifying; arranging in a systematic order | - |
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| (noun) a set of rules or principles or laws (especially written ones) | Synonyms: code |
| coding | (noun) act of writing in code or cipher | Synonyms: cryptography, secret writing, steganography |
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| codling | (noun) young codfish | - |
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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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| codpiece | (noun) (15th-16th century) a flap for the crotch of men's tight-fitting breeches | - |
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| codswallop | (noun) nonsensical talk or writing | Synonyms: applesauce, folderol, rubbish, trash, tripe, trumpery, wish-wash |
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| collodion | (noun) a colorless syrupy solution of pyroxylin in ether and alcohol; used as a coating for wounds or photographic films | - |
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| commode | (noun) a plumbing fixture for defecation and urination | Synonyms: can, crapper, pot, potty, stool, throne, toilet |
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| (noun) a tall elegant chest of drawers | Synonyms: chiffonier |
| commodiousness | (noun) spatial largeness and extensiveness (especially inside a building) | Synonyms: capaciousness, roominess, spaciousness |
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| commodity | (noun) a raw material that is sold in large quantities, usually to other businesses for manufacturing or production purposes | Synonyms: good, trade good |
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| commodore | (noun) a commissioned naval officer who ranks above a captain and below a rear admiral; the lowest grade of admiral | - |
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| conodont | (noun) small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes | - |
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| (noun) the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta | - |
| copepod | (noun) minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish | Synonyms: copepod crustacean |
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| coralwood | (noun) East Indian tree with racemes of yellow-white flowers; cultivated as an ornamental | Synonyms: Adenanthera pavonina, Barbados pride, coral-wood, peacock flower fence, red sandalwood |
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| cordwood | (noun) firewood cut and stacked in cords; wood sold by the cord | - |
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| corkwood | (noun) very small deciduous dioecious tree or shrub of damp habitats in southeastern United States having extremely light wood | Synonyms: corkwood tree, Leitneria floridana |
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| corroding | (noun) erosion by chemical action | Synonyms: corrosion, erosion |
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| cottonwood | (noun) any of several North American trees of the genus Populus having a tuft of cottony hairs on the seed | - |
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| (noun) American basswood of the Allegheny region | Synonyms: Tilia heterophylla, white basswood |
| crocodile | (noun) large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters | - |
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| crocodilian | (noun) extant archosaurian reptile | Synonyms: crocodilian reptile |
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| custodian | (noun) one having charge of buildings or grounds or animals | Synonyms: keeper, steward |
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| custodianship | (noun) the position of custodian | - |
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| custody | (noun) holding by the police | - |
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| (noun) (with `in') guardianship over; in divorce cases it is the right to house and care for and discipline a child | Synonyms: hands |
| (noun) a state of being confined (usually for a short time) | Synonyms: detainment, detention, hold |
| cynodont | (noun) small carnivorous reptiles | - |
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| cyprinodont | (noun) any member of the family Cyprinodontidae | - |
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| daffodil | (noun) any of numerous varieties of Narcissus plants having showy often yellow flowers with a trumpet-shaped central crown | Synonyms: Narcissus pseudonarcissus |
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| deadwood | (noun) someone or something that is unwanted and unneeded | Synonyms: fifth wheel |
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| (noun) a branch or a part of a tree that is dead | - |
| decapod | (noun) crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax | Synonyms: decapod crustacean |
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| (noun) cephalopods having eight short tentacles plus two long ones | - |
| decoder | (noun) a machine that converts a coded text into ordinary language | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decipherer |
| decoding | (noun) the activity of making clear or converting from code into plain text | Synonyms: decipherment, decryption |
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| demigod | (noun) a person who is part mortal and part god | Synonyms: daemon |
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| (noun) a person with great powers and abilities | Synonyms: superman, Ubermensch |
| demodulation | (noun) (electronics) the reception of a signal by extracting it from the carrier wave | - |
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| demodulator | (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: detector |
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| deodar | (noun) tall East Indian cedar having spreading branches with nodding tips; highly valued for its appearance as well as its timber | Synonyms: Cedrus deodara, deodar cedar, Himalayan cedar |
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| deodorant | (noun) a toiletry applied to the skin in order to mask unpleasant odors | Synonyms: deodourant |
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| deodourant | (noun) a toiletry applied to the skin in order to mask unpleasant odors | Synonyms: deodorant |
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| devilwood | (noun) small tree of southern United States having panicles of dull white flowers followed by dark purple fruits | Synonyms: American olive, Osmanthus americanus |
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| dicamptodon | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodontid |
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| dicamptodontid | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodon |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dicynodont | (noun) a kind of therapsid | - |
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| dimetrodon | (noun) carnivorous dinosaur of the Permian in North America having a crest or dorsal sail | - |
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| diode | (noun) a semiconductor that consists of a p-n junction | Synonyms: crystal rectifier, junction rectifier, semiconductor diode |
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| (noun) a thermionic tube having two electrodes; used as a rectifier | Synonyms: rectifying tube, rectifying valve |
| diplodocus | (noun) a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America | - |
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| dislodgement | (noun) forced removal from a position of advantage | Synonyms: dislodgment |
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| dislodgment | (noun) forced removal from a position of advantage | Synonyms: dislodgement |
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| dodder | (noun) a leafless annual parasitic vine of the genus Cuscuta having whitish or yellow filamentous stems; obtain nourishment through haustoria | - |
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| dodderer | (noun) one who dodders from old age and weakness | - |
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| doddle | (noun) an easy task | - |
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| dodecagon | (noun) a twelve-sided polygon | - |
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| dodecahedron | (noun) any polyhedron having twelve plane faces | - |
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