| cuticle | (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: carapace, shell, shield |
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| (noun) the outer layer of the skin covering the exterior body surface of vertebrates | Synonyms: epidermis |
| (noun) the dead skin at the base of a fingernail or toenail | - |
| cuticula | (noun) the outer body wall of an insect | - |
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| 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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| cutis | (noun) a natural protective body covering and site of the sense of touch | Synonyms: skin, tegument |
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| cutlas | (noun) a short heavy curved sword with one edge; formerly used by sailors | Synonyms: cutlass |
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| cutlass | (noun) a short heavy curved sword with one edge; formerly used by sailors | Synonyms: cutlas |
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| cutlassfish | (noun) long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel | Synonyms: frost fish, hairtail |
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| cutler | (noun) a dealer in cutlery | - |
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| cutlery | (noun) tableware implements for cutting and eating food | Synonyms: eating utensil |
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| (noun) a cutting implement; a tool for cutting | Synonyms: cutter, cutting tool |
| cutlet | (noun) thin slice of meat (especially veal) usually fried or broiled | Synonyms: escallop, scallop, scollop |
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| cutoff | (noun) a route shorter than the usual one | Synonyms: crosscut, shortcut |
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| (noun) a device that terminates the flow in a pipe | - |
| (noun) a designated limit beyond which something cannot function or must be terminated | - |
| cutout | (noun) a part that is cut out or is intended to be cut out | - |
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| (noun) a photograph from which the background has been cut away | - |
| (noun) a switch that interrupts an electric circuit in the event of an overload | - |
| cutpurse | (noun) a thief who steals from the pockets or purses of others in public places | Synonyms: dip, pickpocket |
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| cutter | (noun) a cutting implement; a tool for cutting | Synonyms: cutlery, cutting tool |
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| (noun) a boat for communication between ship and shore | Synonyms: pinnace, ship's boat, tender |
| (noun) a sailing vessel with a single mast set further back than the mast of a sloop | - |
| (noun) someone whose work is cutting (as e.g. cutting cloth for garments) | - |
| (noun) someone who carves the meat | Synonyms: carver |
| (noun) someone who cuts or carves stone | Synonyms: stonecutter |
| cutthroat | (noun) someone who murders by cutting the victim's throat | - |
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| cutting | (noun) the act of shortening something by chopping off the ends | Synonyms: cut, cutting off |
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| (noun) the act of cutting something into parts | Synonyms: cut |
| (noun) the act of penetrating or opening open with a sharp edge | Synonyms: cut |
| (noun) the activity of selecting the scenes to be shown and putting them together to create a film | Synonyms: film editing |
| (noun) the act of diluting something | Synonyms: thinning |
| (noun) removing parts from hard material to create a desired pattern or shape | Synonyms: carving |
| (noun) the division of a deck of cards before dealing | Synonyms: cut |
| (noun) an excerpt cut from a newspaper or magazine | Synonyms: clipping, newspaper clipping, press clipping, press cutting |
| (noun) a piece cut off from the main part of something | - |
| (noun) a part (sometimes a root or leaf or bud) removed from a plant to propagate a new plant through rooting or grafting | Synonyms: slip |
| cuttle | (noun) ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell | Synonyms: cuttlefish |
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| cuttlefish | (noun) ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell | Synonyms: cuttle |
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| cutwork | (noun) embroidery in which the design is outlined in a buttonhole stitch and the intervening material is cut away | - |
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| cutworm | (noun) North American moth whose larvae feed on young plant stems cutting them off at the ground | - |
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| cyberculture | (noun) the culture that emerges from the use of computers for communication and entertainment and business | - |
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| cynancum | (noun) any of various mostly giant tropical lianas of Africa and Madagascar having greenish or purple flowers and long smooth pods; roots formerly used as an emetic | - |
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| decubitus | (noun) a reclining position (as in a bed) | - |
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| decumary | (noun) woody climber of southeastern United States having white flowers in compound terminal clusters | Synonyms: Decumaria barbara, Decumaria barbata |
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| decussation | (noun) an intersection or crossing of two tracts in the form of the letter X | Synonyms: chiasm, chiasma |
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| dicumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicoumarol |
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| difficultness | (noun) the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result | Synonyms: difficulty |
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| difficulty | (noun) an effort that is inconvenient | Synonyms: trouble |
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| (noun) the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result | Synonyms: difficultness |
| diplococcus | (noun) Gram-positive bacteria usually occurring in pairs | - |
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| diplodocus | (noun) a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America | - |
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| discursiveness | (noun) the quality of being discursive | - |
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| discus | (noun) a disk used in throwing competitions | Synonyms: saucer |
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| (noun) an athletic competition in which a disk-shaped object is thrown as far as possible | - |
| discussant | (noun) a participant in a formal discussion | - |
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| discussion | (noun) an exchange of views on some topic | Synonyms: give-and-take, word |
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| (noun) an extended communication (often interactive) dealing with some particular topic | Synonyms: discourse, treatment |
| diverticulitis | (noun) inflammation of a diverticulum in the digestive tract (especially the colon); characterized by painful abdominal cramping and fever and constipation | - |
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| diverticulosis | (noun) presence of multiple diverticula in the walls of the colon | - |
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| diverticulum | (noun) a herniation through the muscular wall of a tubular organ (especially the colon) | - |
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| docudrama | (noun) a film or TV program presenting the facts about a person or event | Synonyms: documentary, documentary film, infotainment |
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| document | (noun) anything serving as a representation of a person's thinking by means of symbolic marks | - |
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| (noun) writing that provides information (especially information of an official nature) | Synonyms: papers, written document |
| (noun) (computer science) a computer file that contains text (and possibly formatting instructions) using seven-bit ASCII characters | Synonyms: text file |
| (noun) a written account of ownership or obligation | - |
| documentary | (noun) a film or TV program presenting the facts about a person or event | Synonyms: docudrama, documentary film, infotainment |
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| documentation | (noun) documentary validation | Synonyms: support |
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| (noun) confirmation that some fact or statement is true through the use of documentary evidence | Synonyms: certification, corroboration |
| (noun) program listings or technical manuals describing the operation and use of programs | Synonyms: software documentation |
| dracunculiasis | (noun) a painful and debilitating infestation contracted by drinking stagnant water contaminated with Guinea worm larvae that can mature inside a human's abdomen until the worm emerges through a painful blister in the person's skin | Synonyms: Guinea worm, Guinea worm disease |
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| dyscalculia | (noun) impaired ability to learn grade-appropriate mathematics | - |
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| earcuff | (noun) a non-pierced earring of varying size (i.e. small wrap or hook big enough to hang over the whole ear and dangle) worn on the rim of the ear. | Synonyms: ear cuff, ear hook earring, ear wrap |
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| echinococcus | (noun) tapeworms whose larvae are parasitic in humans and domestic animals | - |
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| ecumenicalism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicism, ecumenism |
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| ecumenicism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicalism, ecumenism |
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| ecumenism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicalism, ecumenicism |
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| (noun) a movement promoting union between religions (especially between Christian churches) | Synonyms: oecumenism |
| eggcup | (noun) dishware consisting of a small cup for serving a boiled egg | Synonyms: egg cup |
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| ejaculate | (noun) the thick white fluid containing spermatozoa that is ejaculated by the male genital tract | Synonyms: come, cum, seed, semen, seminal fluid |
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| ejaculation | (noun) an abrupt emphatic exclamation expressing emotion | Synonyms: interjection |
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| (noun) the discharge of semen in males | - |
| ejaculator | (noun) a speaker who utters a sudden exclamation | - |
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| (noun) a man who ejaculates semen | - |
| electrocution | (noun) killing by electric shock | - |
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| (noun) execution by electricity | Synonyms: burning |
| electrocutioner | (noun) an executioner who uses electricity to kill the condemned person | - |
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| elocution | (noun) an expert manner of speaking involving control of voice and gesture | - |
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| elocutionist | (noun) a public speaker trained in voice production and gesture and delivery | - |
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| elucubration | (noun) a written work produced by elucubrating. | - |
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| emasculation | (noun) neutering a male animal by removing the testicles | Synonyms: castration |
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| (noun) loss of power and masculinity | - |
| enculturation | (noun) the adoption of the behavior patterns of the surrounding culture | Synonyms: acculturation, socialisation, socialization |
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| encumbrance | (noun) any obstruction that impedes or is burdensome | Synonyms: hinderance, hindrance, hitch, incumbrance, interference, preventative, preventive |
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| (noun) an onerous or difficult concern | Synonyms: burden, incumbrance, load, onus |
| (noun) a charge against property (as a lien or mortgage) | Synonyms: incumbrance |
| epicure | (noun) a person devoted to refined sensuous enjoyment (especially good food and drink) | Synonyms: bon vivant, epicurean, foodie, gastronome, gourmet |
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| epicurean | (noun) a person devoted to refined sensuous enjoyment (especially good food and drink) | Synonyms: bon vivant, epicure, foodie, gastronome, gourmet |
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| epicureanism | (noun) a doctrine of hedonism that was defended by several ancient Greek philosophers | - |
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| epicurism | (noun) the disposition and habits of an epicure | - |
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| escudo | (noun) the basic unit of money on Cape Verde; equal to 100 centavos | Synonyms: Cape Verde escudo |
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| (noun) formerly the basic monetary unit of Portugal; equal to 100 centavo | Synonyms: Portuguese escudo |
| escutcheon | (noun) a shield; especially one displaying a coat of arms | Synonyms: scutcheon |
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| (noun) (nautical) a plate on a ship's stern on which the name is inscribed | - |
| (noun) a flat protective covering (on a door or wall etc) to prevent soiling by dirty fingers | Synonyms: finger plate, scutcheon |
| evacuation | (noun) the act of removing the contents of something | Synonyms: emptying, voidance |
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| (noun) the act of evacuating; leaving a place in an orderly fashion; especially for protection | - |
| (noun) the bodily process of discharging waste matter | Synonyms: elimination, excreting, excretion, voiding |
| evacuee | (noun) a person who has been evacuated from a dangerous place | - |
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| exculpation | (noun) the act of freeing from guilt or blame | - |
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| (noun) a defense of some offensive behavior or some failure to keep a promise etc. | Synonyms: alibi, excuse, self-justification |
| excursion | (noun) a journey taken for pleasure | Synonyms: expedition, jaunt, junket, outing, pleasure trip, sashay |
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| (noun) wandering from the main path of a journey | Synonyms: digression |
| excursionist | (noun) a tourist who is visiting sights of interest | Synonyms: rubberneck, sightseer, tripper |
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| excursus | (noun) a message that departs from the main subject | Synonyms: aside, digression, divagation, parenthesis |
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| excuse | (noun) a poor example | Synonyms: apology |
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| (noun) a defense of some offensive behavior or some failure to keep a promise etc. | Synonyms: alibi, exculpation, self-justification |
| (noun) a note explaining an absence | - |
| excuser | (noun) a person who pardons or forgives or excuses a fault or offense | Synonyms: forgiver, pardoner |
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| executability | (noun) capability of being executed | - |
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| executant | (noun) a performer (usually of musical works) | - |
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| executing | (noun) putting a condemned person to death | Synonyms: capital punishment, death penalty, execution |
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| execution | (noun) putting a condemned person to death | Synonyms: capital punishment, death penalty, executing |
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| (noun) unlawful premeditated killing of a human being by a human being | Synonyms: murder, slaying |
| (noun) the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it | Synonyms: carrying into action, carrying out, performance |
| (noun) the act of accomplishing some aim or executing some order | Synonyms: carrying out, implementation |
| (noun) a routine court order that attempts to enforce the judgment that has been granted to a plaintiff by authorizing a sheriff to carry it out | Synonyms: writ of execution |
| (noun) (law) the completion of a legal instrument (such as a contract or deed) by signing it (and perhaps sealing and delivering it) so that it becomes legally binding and enforceable | Synonyms: execution of instrument |
| (noun) (computer science) the process of carrying out an instruction by a computer | Synonyms: instruction execution |
| executioner | (noun) an official who inflicts capital punishment in pursuit of a warrant | Synonyms: public executioner |
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| executive | (noun) persons who administer the law | - |
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| (noun) a person responsible for the administration of a business | Synonyms: executive director |
| (noun) someone who manages a government agency or department | Synonyms: administrator |
| executor | (noun) a person appointed by a testator to carry out the terms of the will | - |
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| executrix | (noun) a woman executor | - |
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| eyecup | (noun) (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina | Synonyms: optic cup |
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| (noun) a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball | Synonyms: eye cup, eyebath |
| facula | (noun) a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspots | Synonyms: solar facula |
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| (noun) a bright spot on a planet | - |
| faculty | (noun) one of the inherent cognitive or perceptual powers of the mind | Synonyms: mental faculty, module |
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| (noun) the body of teachers and administrators at a school | Synonyms: staff |
| fasciculation | (noun) muscular twitching of contiguous groups of muscle fibers | - |
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| fascicule | (noun) an installment of a printed work | Synonyms: fascicle |
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| fasciculus | (noun) a bundle of fibers (especially nerve fibers) | Synonyms: fascicle, fiber bundle, fibre bundle |
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| fecula | (noun) excreta (especially of insects) | - |
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| feculence | (noun) something that is feculent | - |
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| fecundation | (noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant | Synonyms: fertilisation, fertilization, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fertilisation, fertilization |
| fecundity | (noun) the quality of something that causes or assists healthy growth | Synonyms: fruitfulness |
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| (noun) the intellectual productivity of a creative imagination | Synonyms: fruitfulness |
| (noun) the state of being fertile; capable of producing offspring | Synonyms: fertility |
| fescue | (noun) grass with wide flat leaves cultivated in Europe and America for permanent pasture and hay and for lawns | Synonyms: fescue grass, Festuca elatior, meadow fescue |
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| fisticuffs | (noun) fighting with the fists | Synonyms: boxing, pugilism |
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| (noun) a fight with bare fists | Synonyms: fistfight, slugfest |
| flocculation | (noun) the process of flocculating; forming woolly cloudlike aggregations | - |
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| flocculator | (noun) An apparatus used in the process of flocculation. | - |
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| floccule | (noun) a small loosely aggregated mass of flocculent material suspended in or precipitated from a liquid | Synonyms: floc |
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| floriculture | (noun) the cultivation of flowering plants | Synonyms: flower gardening |
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| focus | (noun) maximum clarity or distinctness of an image rendered by an optical system | - |
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| (noun) maximum clarity or distinctness of an idea | - |
| (noun) the concentration of attention or energy on something | Synonyms: centering, centring, direction, focal point, focusing, focussing |
| (noun) a fixed reference point on the concave side of a conic section | - |
| (noun) a point of convergence of light (or other radiation) or a point from which it diverges | Synonyms: focal point |
| (noun) a central point or locus of an infection in an organism | Synonyms: focal point, nidus |
| (noun) special emphasis attached to something | Synonyms: stress |
| focusing | (noun) the act of bringing into focus | Synonyms: focalisation, focalization |
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| (noun) the concentration of attention or energy on something | Synonyms: centering, centring, direction, focal point, focus, focussing |