| capuchin | (noun) monkey of Central America and South America having thick hair on the head that resembles a monk's cowl | Synonyms: Cebus capucinus, ringtail |
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| (noun) a hooded cloak for women | - |
| capulin | (noun) Mexican black cherry | Synonyms: Mexican black cherry |
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| (noun) Mexican black cherry tree having edible fruit | Synonyms: capulin tree, Prunus capuli |
| carbomycin | (noun) a colorless basic antibiotic that inhibits the growth of Gram-positive organisms | - |
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| carotin | (noun) an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver | Synonyms: carotene, provitamin A |
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| carrageenin | (noun) a colloidal extract from carrageen seaweed and other red algae | Synonyms: carrageenan |
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| casein | (noun) a water-base paint made with a protein precipitated from milk | Synonyms: casein paint |
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| (noun) a milk protein used in making e.g. plastics and adhesives | - |
| catamountain | (noun) bushy-tailed wildcat of Europe that resembles the domestic cat and is regarded as the ancestor of the domestic cat | Synonyms: European wildcat, Felis silvestris |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catkin | (noun) a cylindrical spikelike inflorescence | Synonyms: ament |
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| cephalexin | (noun) a cephalosporin antibiotic (trade names Keflex and Keflin and Keftab) commonly prescribed for mild to moderately severe infections of the skin or ears or throat or lungs or urinary tract | Synonyms: Keflex, Keflin, Keftab |
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| cephaloglycin | (noun) antibiotic related to cephalosporin but no longer in common use | Synonyms: Kafocin |
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| cephalosporin | (noun) one of several broad spectrum antibiotic substances obtained from fungi and related to penicillin (trade names Mefoxin); addition of side chains has produced semisynthetic antibiotics with greater antibacterial activity | Synonyms: Mefoxin |
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| cephalothin | (noun) a semisynthetic analogue of cephalosporin | - |
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| ceratin | (noun) a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves | Synonyms: keratin |
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| ceresin | (noun) a white wax extracted from ozokerite | - |
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| cerivastatin | (noun) an oral drug (trade name Baycol) to reduce blood cholesterol levels | Synonyms: Baycol |
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| certain | (adjective) established beyond doubt or question; definitely known | - |
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| (adjective) having or feeling no doubt or uncertainty; confident and assured | Synonyms: sure |
| (adjective) certain to occur; destined or inevitable | Synonyms: sure |
| (adjective) established irrevocably | Synonyms: sealed |
| (adjective) exercising or taking care great enough to bring assurance | Synonyms: sure |
| (adjective) definite but not specified or identified | - |
| (adjective) reliable in operation or effect | Synonyms: sure |
| chagrin | (noun) strong feelings of embarrassment | Synonyms: humiliation, mortification |
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| (verb) cause to feel shame; hurt the pride of | Synonyms: abase, humble, humiliate, mortify |
| chain | (noun) a series of (usually metal) rings or links fitted into one another to make a flexible ligament | - |
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| (noun) a necklace made by stringing objects together | Synonyms: strand, string |
| (noun) anything that acts as a restraint | - |
| (noun) a linked or connected series of objects | - |
| (noun) a series of things depending on each other as if linked together | Synonyms: concatenation |
| (noun) (business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership | - |
| (noun) (chemistry) a series of linked atoms (generally in an organic molecule) | Synonyms: chemical chain |
| (noun) a series of hills or mountains | Synonyms: chain of mountains, mountain chain, mountain range, range, range of mountains |
| (noun) a unit of length | - |
| (verb) fasten or secure with chains | - |
| (verb) connect or arrange into a chain by linking | - |
| chamberlain | (noun) the treasurer of a municipal corporation | - |
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| (noun) an officer who manages the household of a king or nobleman | - |
| chaplain | (noun) a clergyman ministering to some institution | - |
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| characin | (noun) any freshwater fish of the family Characinidae | Synonyms: characid, characin fish |
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| checkrein | (noun) a rein designed to keep the horse's head in the desired position | Synonyms: bearing rein |
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| chevrotain | (noun) very small hornless deer-like ruminant of tropical Asia and west Africa | Synonyms: mouse deer |
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| chieftain | (noun) the head of a tribe or clan | Synonyms: chief, headman, tribal chief |
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| (noun) the leader of a group of people | Synonyms: captain |
| chilblain | (noun) inflammation of the hands and feet caused by exposure to cold and moisture | Synonyms: chilblains, pernio |
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| chin | (noun) the protruding part of the lower jaw | Synonyms: mentum |
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| (verb) raise oneself while hanging from one's hands until one's chin is level with the support bar | Synonyms: chin up |
| chincapin | (noun) small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut | Synonyms: chinkapin, chinquapin |
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| chinkapin | (noun) small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut | Synonyms: chincapin, chinquapin |
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| chinquapin | (noun) small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut | Synonyms: chincapin, chinkapin |
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| (noun) shrubby chestnut tree of southeastern United States having small edible nuts | Synonyms: Allegheny chinkapin, Castanea pumila, dwarf chestnut, eastern chinquapin |
| (noun) shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States | Synonyms: Castanea ozarkensis, Ozark chinkapin, Ozark chinquapin |
| chitin | (noun) a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi | - |
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| chlorofucin | (noun) the chlorophyll present in brown algae, diatoms, and flagellates | Synonyms: chlorophyll c |
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| chloropicrin | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: nitrochloroform |
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| cholecystokinin | (noun) a gastrointestinal hormone that stimulates the secretion of pancreatic enzymes and the contraction and emptying of the gall bladder; its release is stimulated by the presence of fatty acids and amino acids in the small intestine | - |
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| cholesterin | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterol |
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| chondrin | (noun) a substance that resembles gelatin and is obtained by boiling cartilage in water | - |
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| chromatin | (noun) the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes | Synonyms: chromatin granule |
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| chrysarobin | (noun) a bitter yellow powder used to treat skin diseases | Synonyms: araroba, Goa powder |
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| chymosin | (noun) an enzyme that occurs in gastric juice; causes milk to coagulate | Synonyms: rennin |
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| ciprofloxacin | (noun) an oral antibiotic (trade name Cipro) used against serious bacterial infections of the skin or respiratory tract or urinary tract or bones or joints | Synonyms: Cipro |
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| citrin | (noun) a vitamin that maintains the resistance of cell and capillary walls to permeation | Synonyms: bioflavinoid, vitamin P |
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| clothespin | (noun) wood or plastic fastener; for holding clothes on a clothesline | Synonyms: clothes peg, clothes pin |
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| coalbin | (noun) a bin for holding coal | Synonyms: coalhole |
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| cobalamin | (noun) a B vitamin that is used to treat pernicious anemia | Synonyms: antipernicious anemia factor, cyanocobalamin, vitamin B12 |
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| cocain | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocaine |
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| cochin | (noun) Asian breed of large fowl with dense plumage and feathered legs | Synonyms: cochin china |
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| coffin | (noun) box in which a corpse is buried or cremated | Synonyms: casket |
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| (verb) place into a coffin | - |
| coin | (noun) a flat metal piece (usually a disc) used as money | - |
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| (verb) form by stamping, punching, or printing | Synonyms: mint, strike |
| (verb) make up | - |
| complain | (verb) express complaints, discontent, displeasure, or unhappiness | Synonyms: kick, kvetch, plain, quetch, sound off |
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| (verb) make a formal accusation; bring a formal charge | - |
| complin | (noun) last of the seven canonical hours just before retiring | Synonyms: compline |
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| conjoin | (verb) make contact or come together | Synonyms: join |
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| (verb) take in marriage; married | Synonyms: espouse, get hitched with, get married, hook up with, marry, wed |
| constrain | (verb) severely restrict in scope or extent | Synonyms: stiffen, tighten, tighten up |
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| (verb) to close within bounds, or otherwise limit or deprive of free movement | Synonyms: confine, hold, restrain |
| (verb) compel to behave in a certain way | Synonyms: enforce, impose |
| contain | (verb) hold back, as of a danger or an enemy; check the expansion or influence of | Synonyms: arrest, check, hold back, stop, turn back |
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| (verb) lessen the intensity of; temper; hold in restraint; hold or keep within limits | Synonyms: check, control, curb, hold, hold in, moderate |
| (verb) include or contain; have as a component | Synonyms: comprise, incorporate |
| (verb) be divisible by | - |
| (verb) contain or hold; have within | Synonyms: bear, carry, hold |
| (verb) be capable of holding or containing | Synonyms: hold, take |
| coonskin | (noun) a raccoon cap with the tail hanging down the back | Synonyms: coonskin cap |
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| corticotrophin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, adrenocorticotropin, corticotropin |
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| corticotropin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, adrenocorticotropin, corticotrophin |
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| cothromboplastin | (noun) a coagulation factor formed in the kidney under the influence of vitamin K | Synonyms: factor VII, proconvertin, stable factor |
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| counterstain | (noun) a stain of contrasting color that is used when the principal stain does not show the structure clearly | - |
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| cousin | (noun) the child of your aunt or uncle | Synonyms: cousin-german, first cousin, full cousin |
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| cowskin | (noun) leather made from the hide of a cow | Synonyms: cowhide |
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| coxswain | (noun) the helmsman of a ship's boat or a racing crew | Synonyms: cox |
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| creatin | (noun) an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine; supplies energy for muscle contraction | Synonyms: creatine |
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| cretin | (noun) a person of subnormal intelligence | Synonyms: changeling, half-wit, idiot, imbecile, moron, retard |
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| culverin | (noun) a medieval musket | - |
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| (noun) a heavy cannon with a long barrel used in the 16th and 17th centuries | - |
| cumin | (noun) aromatic seeds of the cumin herb of the carrot family | Synonyms: cumin seed |
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| (noun) dwarf Mediterranean annual long cultivated for its aromatic seeds | Synonyms: Cuminum cyminum |
| curtain | (noun) hanging cloth used as a blind (especially for a window) | Synonyms: drape, drapery, mantle, pall |
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| (noun) any barrier to communication or vision | - |
| (verb) provide with drapery | - |
| cutin | (noun) (biochemistry) a waxy transparent material that occurs in the cuticle of plants and consists of highly polymerized esters of fatty acids | - |
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| cyanocobalamin | (noun) a B vitamin that is used to treat pernicious anemia | Synonyms: antipernicious anemia factor, cobalamin, vitamin B12 |
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| cyanohydrin | (noun) any organic compound in which the cyano radical -CN and the hydroxyl radical -OH are attached to the same carbon atom | - |
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| cycloolefin | (noun) alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. | Synonyms: cycloalkene |
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| cytokinin | (noun) any of a class of plant hormones that promote cell division and delay the senescence of leaves | Synonyms: kinin |
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| cytolysin | (noun) a substance that partly or completely destroys animal cells | - |
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| cytotoxin | (noun) any substance that has a toxic effect on cells | - |
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| dauphin | (noun) formerly, the eldest son of the King of France and direct heir to the throne | - |
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| deerskin | (noun) leather from the hide of a deer | - |
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| dentin | (noun) bone (calcified tissue) surrounding the pulp cavity of a tooth | Synonyms: dentine |
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| (noun) a calcareous material harder and denser than bone that comprises the bulk of a tooth | Synonyms: dentine |
| destain | (verb) remove stain from (a laboratory specimen) to enhance contrast | - |
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| detain | (verb) cause to be slowed down or delayed | Synonyms: delay, hold up |
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| (verb) stop or halt | Synonyms: delay, stay |
| (verb) deprive of freedom; take into confinement | Synonyms: confine |
| detrain | (verb) leave a train | - |
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| devein | (verb) remove the dark dorsal vein of (a shrimp) | - |
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| dextrin | (noun) any of various polysaccharides obtained by hydrolysis of starch; a tasteless and odorless gummy substance that is used as a thickening agent and in adhesives and in dietary supplements | - |
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| diablotin | (noun) a thin round slice of bread usually served with soup, especially consomme. | - |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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| digitalin | (noun) a powerful cardiac stimulant obtained from foxglove | Synonyms: digitalis, digitalis glycoside |
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| digitoxin | (noun) digitalis preparation used to treat congestive heart failure or cardiac arrhythmia | - |
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| digoxin | (noun) digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully | Synonyms: Lanoxin |
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| dihydrostreptomycin | (noun) antibiotic consisting of a hydrogenated form of streptomycin; used against tuberculosis and tularemia and Gram-negative organisms | - |
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| din | (noun) the act of making a noisy disturbance | Synonyms: commotion, ruckus, ruction, rumpus, tumult |
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| (noun) a loud harsh or strident noise | Synonyms: blare, blaring, cacophony, clamor |
| (verb) instill (into a person) by constant repetition | - |
| (verb) make a resonant sound, like artillery | Synonyms: boom |
| dioxin | (noun) any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides | - |
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| diphenylhydantoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, phenytoin |
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| disdain | (noun) a communication that indicates lack of respect by patronizing the recipient | Synonyms: condescension, patronage |
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| (noun) lack of respect accompanied by a feeling of intense dislike | Synonyms: contempt, despite, scorn |
| (verb) reject with contempt | Synonyms: freeze off, pooh-pooh, reject, scorn, spurn, turn down |
| (verb) look down on with disdain | Synonyms: contemn, despise, scorn |
| disjoin | (verb) become separated, disconnected or disjoint | Synonyms: disjoint |
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| (verb) make disjoint, separated, or disconnected; undo the joining of | Synonyms: disjoint |
| distrain | (verb) confiscate by distress | - |
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| (verb) levy a distress on | - |
| (verb) legally take something in place of a debt payment | - |
| dobbin | (noun) a quiet plodding workhorse | Synonyms: farm horse |
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| doeskin | (noun) a fine smooth soft woolen fabric | - |
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| (noun) soft leather from deerskin or lambskin | - |
| dolphin | (noun) any of various small toothed whales with a beaklike snout; larger than porpoises | - |
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| (noun) large slender food and game fish widely distributed in warm seas (especially around Hawaii) | Synonyms: dolphinfish, mahimahi |
| domain | (noun) the content of a particular field of knowledge | Synonyms: knowledge base, knowledge domain |
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| (noun) people in general; especially a distinctive group of people with some shared interest | Synonyms: world |
| (noun) (mathematics) the set of values of the independent variable for which a function is defined | Synonyms: domain of a function |
| (noun) territory over which rule or control is exercised | Synonyms: demesne, land |
| (noun) a particular environment or walk of life | Synonyms: area, arena, field, orbit, sphere |
| downspin | (noun) a swift and dangerous downturn | - |
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| doxazosin | (noun) an antihypertensive drug (trade name Cardura) that works by relaxing blood vessels so that blood passes through them more easily; it is also used to treat benign prostatic hyperplasia | Synonyms: Cardura |
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| doxepin | (noun) a tricyclic antidepressant (trade names Adapin and Sinequan) with numerous side effects (dry mouth and sedation and gastrointestinal disturbances) | Synonyms: Adapin, doxepin hydrochloride, Sinequan |
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