| cholelithotomy | (noun) removal of gallstone through an incision in the gallbladder | - |
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| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| chrestomathy | (noun) a selection of passages from different authors that is compiled as an aid in learning a language | - |
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| chromaesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromesthesia |
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| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| chromolithograph | (noun) a print made by chromolithography. | - |
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| chromolithography | (noun) single- or multi-color lithography | - |
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| chrysanthemum | (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated | - |
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| (noun) the flower of a chrysanthemum plant | - |
| chrysotherapy | (noun) the use of chemicals containing gold for treating diseases (such as rheumatoid arthritis) | - |
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| cither | (noun) a musical stringed instrument with strings stretched over a flat sounding board; it is laid flat and played with a plectrum and with fingers | Synonyms: zither, zithern |
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| (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cithern, citole, cittern, gittern |
| cithern | (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cither, citole, cittern, gittern |
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| cleistothecium | (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration | Synonyms: cleistocarp |
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| clianthus | (noun) any of various shrubs or vines of the genus Clianthus having compound leaves and pea-like red flowers in drooping racemes | Synonyms: glory pea |
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| clocksmith | (noun) someone whose occupation is making or repairing clocks and watches | Synonyms: clockmaker |
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| cloth | (noun) artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers | Synonyms: fabric, material, textile |
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| clothes | (noun) clothing in general | Synonyms: apparel, dress, wearing apparel |
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| clothesbrush | (noun) a brush used for cleaning clothing | - |
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| clotheshorse | (noun) a framework on which to hang clothes (as for drying) | - |
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| (noun) a man who is much concerned with his dress and appearance | Synonyms: beau, dandy, dude, fashion plate, fop, gallant, sheik, swell |
| clothesline | (noun) a cord on which clothes are hung to dry | - |
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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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| clothespress | (noun) a closet where clothes are stored | Synonyms: clothes closet |
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| clothier | (noun) a merchant who sells men's clothing | Synonyms: haberdasher |
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| clothing | (noun) a covering designed to be worn on a person's body | Synonyms: article of clothing, habiliment, vesture, wear, wearable |
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| coauthor | (noun) a writer who collaborates with others in writing something | Synonyms: joint author |
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| coelacanth | (noun) fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa | Synonyms: Latimeria chalumnae |
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| commonwealth | (noun) a politically organized body of people under a single government | Synonyms: body politic, country, land, nation, res publica, state |
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| (noun) a political system in which the supreme power lies in a body of citizens who can elect people to represent them | Synonyms: democracy, republic |
| (noun) a world organization of autonomous states that are united in allegiance to a central power but are not subordinate to it or to one another | - |
| (noun) the official name of some states in the United States (Massachusetts and Pennsylvania and Virginia and Kentucky) and associated territories (Puerto Rico) | - |
| compsognathus | (noun) very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria | - |
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| coppersmith | (noun) someone who makes articles from copper | - |
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| coprolith | (noun) a hard mass of fecal matter | Synonyms: faecalith, fecalith, stercolith |
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| coryphantha | (noun) a cactus of the genus Coryphantha | - |
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| corythosaur | (noun) duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet | Synonyms: corythosaurus |
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| corythosaurus | (noun) duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet | Synonyms: corythosaur |
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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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| cottonmouth | (noun) venomous semiaquatic snake of swamps in southern United States | Synonyms: Agkistrodon piscivorus, cottonmouth moccasin, water moccasin |
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| courthouse | (noun) a building that houses judicial courts | - |
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| (noun) a government building that houses the offices of a county government | - |
| couth | (noun) (used facetiously) refinement | - |
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| creditworthiness | (noun) trustworthiness with money as based on a person's credit history; a general qualification for borrowing | - |
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| crith | (noun) the weight of a liter of hydrogen (at 0 centigrade and 760 millimeters pressure) | - |
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| cryaesthesia | (noun) hypersensitivity to cold | Synonyms: cryesthesia |
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| cryesthesia | (noun) hypersensitivity to cold | Synonyms: cryaesthesia |
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| cryoanaesthesia | (noun) insensibility resulting from cold | Synonyms: cryoanesthesia |
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| cryoanesthesia | (noun) insensibility resulting from cold | Synonyms: cryoanaesthesia |
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| cryopathy | (noun) destruction of tissue by freezing and characterized by tingling, blistering and possibly gangrene | Synonyms: frostbite |
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| cutthroat | (noun) someone who murders by cutting the victim's throat | - |
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| cyclothymia | (noun) a mild bipolar disorder that persists over a long time | Synonyms: cyclic disorder, cyclothymic disorder |
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| cystolith | (noun) a calculus formed in the bladder | Synonyms: bladder stone |
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| daleth | (noun) the 4th letter of the Hebrew alphabet | - |
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| dearth | (noun) an insufficient quantity or number | Synonyms: paucity |
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| (noun) an acute insufficiency | Synonyms: famine, shortage |
| death | (noun) the act of killing | - |
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| (noun) the event of dying or departure from life | Synonyms: decease, expiry |
| (noun) the permanent end of all life functions in an organism or part of an organism | - |
| (noun) the absence of life or state of being dead | - |
| (noun) a final state | Synonyms: destruction, end |
| (noun) the time when something ends | Synonyms: demise, dying |
| (noun) the time at which life ends; continuing until dead | Synonyms: last |
| deathbed | (noun) the bed on which a person dies | - |
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| (noun) the last few hours before death | - |
| deathblow | (noun) the blow that kills (usually mercifully) | Synonyms: coup de grace |
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| deathrate | (noun) the ratio of deaths in an area to the population of that area; expressed per 1000 per year | Synonyms: death rate, fatality rate, mortality, mortality rate |
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| deathtrap | (noun) any structure that is very unsafe; where people are likely to be killed | - |
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| deathwatch | (noun) bores through wood making a ticking sound popularly thought to presage death | Synonyms: deathwatch beetle, Xestobium rufovillosum |
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| (noun) minute wingless psocopterous insects injurious to books and papers | Synonyms: book louse, booklouse, Liposcelis divinatorius |
| decathlon | (noun) an athletic contest consisting of ten different events | - |
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| demythologisation | (noun) the restatement of a message (as a religious one) in rational terms | Synonyms: demythologization |
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| demythologization | (noun) the restatement of a message (as a religious one) in rational terms | Synonyms: demythologisation |
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| deoxythymidine | (noun) a nucleoside component of DNA; composed of thymine and deoxyribose | Synonyms: thymidine |
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| depth | (noun) the extent downward or backward or inward | Synonyms: deepness |
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| (noun) degree of psychological or intellectual profundity | - |
| (noun) the attribute or quality of being deep, strong, or intense | - |
| (noun) the intellectual ability to penetrate deeply into ideas | Synonyms: astuteness, deepness, profoundness, profundity |
| (noun) (usually plural) a low moral state | - |
| depths | (noun) (plural) the deepest and most remote part | - |
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| dethronement | (noun) the act of deposing someone; removing a powerful person from a position or office | Synonyms: deposition |
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| dexamethasone | (noun) a corticosteroid drug (trade names Decadron or Dexamethasone Intensol or Dexone or Hexadrol or Oradexon) used to treat allergies or inflammation | Synonyms: Decadron, Dexamethasone Intensol, Dexone, Hexadrol, Oradexon |
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| diarthrosis | (noun) a joint so articulated as to move freely | Synonyms: articulatio synovialis, synovial joint |
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| diathermy | (noun) a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents | - |
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| diathesis | (noun) constitutional predisposition to a particular disease or abnormality | - |
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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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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| diethylmalonylurea | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, veronal |
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| diethylstilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, stilbesterol |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| diphtheria | (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing | - |
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| diphthong | (noun) a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another | - |
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| discotheque | (noun) a public dance hall for dancing to recorded popular music | Synonyms: disco |
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| dishcloth | (noun) a cloth for washing dishes | Synonyms: dishrag |
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| dither | (noun) an excited state of agitation | Synonyms: flap, fuss, pother, tizzy |
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| dithering | (noun) the process of representing intermediate colors by patterns of tiny colored dots that simulate the desired color | - |
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| dithyramb | (noun) (ancient Greece) a passionate hymn (usually in honor of Dionysus) | - |
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| (noun) a wildly enthusiastic speech or piece of writing | - |
| dogtooth | (noun) a carved pyramidal ornament; used in 13th century England | - |
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| (noun) one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars | Synonyms: canine, canine tooth, cuspid, eye tooth, eyetooth |
| (noun) perennial woodland spring-flowering plant; widely cultivated | Synonyms: dog's-tooth violet, dogtooth violet |
| doublethink | (noun) believing two contradictory ideas at the same time | - |
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| drouth | (noun) a shortage of rainfall | Synonyms: drought |
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| (noun) a prolonged shortage | Synonyms: drought |
| druthers | (noun) the right or chance to choose | Synonyms: preference |
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| dryopithecine | (noun) considered a possible ancestor to both anthropoid apes and humans | - |
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| dustcloth | (noun) a piece of cloth used for dusting | Synonyms: duster, dustrag |
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| dysarthria | (noun) impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature | - |
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| dysthymia | (noun) mild chronic depression | Synonyms: dysthymic depression |
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| earth | (noun) a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage) | Synonyms: ground |
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| (noun) the concerns of this life as distinguished from heaven and the afterlife | Synonyms: earthly concern, world, worldly concern |
| (noun) the abode of mortals (as contrasted with Heaven or Hell) | Synonyms: Earth |
| (noun) the solid part of the earth's surface | Synonyms: dry land, ground, land, solid ground, terra firma |
| (noun) the 3rd planet from the sun; the planet we live on | Synonyms: Earth, globe, world |
| (noun) the loose soft material that makes up a large part of the land surface | Synonyms: ground |
| (noun) once thought to be one of four elements composing the universe (Empedocles), associated with the humour black bile | - |
| earthball | (noun) any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles | Synonyms: false truffle, hard-skinned puffball, puffball |
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| earthenware | (noun) ceramic ware made of porous clay fired at low heat | - |
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| earthing | (noun) fastening electrical equipment to earth | Synonyms: grounding |
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| earthling | (noun) an inhabitant of the earth | Synonyms: earthman, tellurian, worldling |
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| earthman | (noun) an inhabitant of the earth | Synonyms: earthling, tellurian, worldling |
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| earthnut | (noun) edible subterranean fungus of the genus Tuber | Synonyms: truffle |
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| (noun) pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms | Synonyms: goober, goober pea, groundnut, monkey nut, peanut |
| (noun) a common European plant having edible tubers with the flavor of roasted chestnuts | Synonyms: Conopodium denudatum |
| (noun) any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe | Synonyms: earth-ball, truffle |
| earthquake | (noun) shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity | Synonyms: quake, seism, temblor |
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| (noun) a disturbance that is extremely disruptive | - |
| earthstar | (noun) any fungus of the family Geastraceae; in form suggesting a puffball whose outer peridium splits into the shape of a star | - |
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| earthtongue | (noun) any club-shaped fungus of the genus Geoglossum | Synonyms: earth-tongue |
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| earthwork | (noun) an earthen rampart | - |
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| earthworm | (noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | Synonyms: angleworm, crawler, dew worm, fishing worm, fishworm, nightcrawler, nightwalker, red worm, wiggler |
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| ectotherm | (noun) an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals | Synonyms: poikilotherm |
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