| cecal | (adjective) of or like a cecum | Synonyms: caecal |
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| cefadroxil | (noun) a cephalosporin antibiotic (trade name Ultracef) | Synonyms: Ultracef |
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| celestial | (adjective) relating to or inhabiting a divine heaven | Synonyms: heavenly |
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| (adjective) of or relating to the sky | Synonyms: heavenly |
| (adjective) of heaven or the spirit | Synonyms: ethereal, supernal |
| cell | (noun) (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals | - |
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| (noun) a device that delivers an electric current as the result of a chemical reaction | Synonyms: electric cell |
| (noun) a room where a prisoner is kept | Synonyms: jail cell, prison cell |
| (noun) small room in which a monk or nun lives | Synonyms: cubicle |
| (noun) any small compartment | - |
| (noun) a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver | Synonyms: cellphone, cellular phone, cellular telephone, mobile phone |
| (noun) a small unit serving as part of or as the nucleus of a larger political movement | Synonyms: cadre |
| cenobitical | (adjective) of or relating to or befitting cenobites or their practices of communal living | Synonyms: cenobitic, coenobitic, coenobitical |
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| censorial | (adjective) belonging or relating to a censor or a censor's functions | - |
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| cental | (noun) a United States unit of weight equivalent to 100 pounds | Synonyms: centner, cwt, hundredweight, quintal, short hundredweight |
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| centennial | (adjective) of or relating to or completing a period of 100 years | Synonyms: centenary |
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| (noun) the 100th anniversary (or the celebration of it) | Synonyms: centenary |
| centesimal | (adjective) relating to or divided into hundredths | - |
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| (adjective) the ordinal number of one hundred in counting order | Synonyms: 100th, hundredth |
| central | (adjective) in or near a center or constituting a center; the inner area | - |
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| (adjective) serving as an essential component | Synonyms: cardinal, fundamental, key, primal |
| (noun) a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication | Synonyms: exchange, telephone exchange |
| centrical | (adjective) having or situated at or near a center | Synonyms: centric |
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| centrifugal | (adjective) tending to move away from a center | - |
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| (adjective) tending away from centralization, as of authority | - |
| (adjective) conveying information to the muscles from the CNS | Synonyms: motor |
| centripetal | (adjective) tending to move toward a center | - |
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| (adjective) of a nerve fiber or impulse originating outside and passing toward the central nervous system | Synonyms: receptive, sensory |
| (adjective) tending to unify | Synonyms: unifying |
| centroidal | (adjective) of or relating to (especially passing through) a centroid | - |
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| cercarial | (adjective) of or relating to cercaria | - |
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| cereal | (adjective) made of grain or relating to grain or the plants that produce it | - |
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| (noun) a breakfast food prepared from grain | - |
| (noun) foodstuff prepared from the starchy grains of cereal grasses | Synonyms: food grain, grain |
| (noun) grass whose starchy grains are used as food: wheat, rice, rye, oats, maize, buckwheat, millet | Synonyms: cereal grass |
| cerebral | (adjective) involving intelligence rather than emotions or instinct | Synonyms: intellectual |
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| (adjective) of or relating to the cerebrum or brain | - |
| cerebrospinal | (adjective) of or relating to the brain and spinal cord | - |
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| ceremonial | (adjective) marked by pomp or ceremony or formality | - |
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| (noun) a formal event performed on a special occasion | Synonyms: ceremonial occasion, ceremony, observance |
| cervical | (adjective) relating to or associated with the neck | - |
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| (adjective) of or relating to the cervix of the uterus | - |
| cesspool | (noun) a covered cistern; waste water and sewage flow into it | Synonyms: cesspit, sink, sump |
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| chaetal | (adjective) of or relating to chaetae (setae or bristles) | - |
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| chanal | (noun) thorny shrub or small tree common in central Argentina having small orange or yellow flowers followed by edible berries | Synonyms: chanar, Geoffroea decorticans |
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| chanceful | (adjective) of uncertain outcome; especially fraught with risk | Synonyms: chancy, dicey, dodgy |
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| chancel | (noun) area around the altar of a church for the clergy and choir; often enclosed by a lattice or railing | Synonyms: bema, sanctuary |
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| chancroidal | (adjective) of or relating to or having chancroids | - |
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| changeful | (adjective) such that alteration is possible; having a marked tendency to change | Synonyms: changeable |
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| channel | (noun) a way of selling a company's product either directly or via distributors | Synonyms: distribution channel |
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| (noun) a passage for water (or other fluids) to flow through | - |
| (noun) a television station and its programs | Synonyms: television channel, TV channel |
| (noun) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance | Synonyms: canal, duct, epithelial duct |
| (noun) a path over which electrical signals can pass | Synonyms: transmission channel |
| (noun) (often plural) a means of communication or access | Synonyms: communication channel, line |
| (noun) a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels | - |
| (noun) a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record) | Synonyms: groove |
| (verb) send from one person or place to another | Synonyms: channelise, channelize, transfer, transmit, transport |
| (verb) direct the flow of | - |
| (verb) transmit or serve as the medium for transmission | Synonyms: carry, conduct, convey, impart, transmit |
| chaparral | (noun) dense vegetation consisting of stunted trees or bushes | Synonyms: bush, scrub |
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| chapel | (noun) a service conducted in a place of worship that has its own altar | Synonyms: chapel service |
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| (noun) a place of worship that has its own altar | - |
| charcoal | (adjective) of a very dark grey | Synonyms: charcoal-gray, charcoal-grey |
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| (noun) a stick of black carbon material used for drawing | Synonyms: fusain |
| (noun) a drawing made with a stick of black carbon material | - |
| (noun) a very dark grey color | Synonyms: charcoal gray, charcoal grey, oxford gray, oxford grey |
| (noun) a carbonaceous material obtained by heating wood or other organic matter in the absence of air | Synonyms: wood coal |
| (verb) draw, trace, or represent with charcoal | - |
| charnel | (adjective) gruesomely indicative of death or the dead | Synonyms: ghastly, sepulchral |
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| (noun) a vault or building where corpses or bones are deposited | Synonyms: charnel house |
| chattel | (noun) personal as opposed to real property; any tangible movable property (furniture or domestic animals or a car etc) | Synonyms: movable, personal chattel |
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| cheerful | (adjective) being full of or promoting cheer; having or showing good spirits | - |
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| (adjective) pleasantly (even unrealistically) optimistic | Synonyms: pollyannaish, upbeat |
| cheliceral | (adjective) of or relating to or resembling chelicerae | Synonyms: chelicerate |
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| chemical | (adjective) relating to or used in chemistry | Synonyms: chemic |
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| (adjective) of or made from or using substances produced by or used in reactions involving atomic or molecular changes | - |
| (noun) material produced by or used in a reaction involving changes in atoms or molecules | Synonyms: chemical substance |
| chemotherapeutical | (adjective) of or relating to chemotherapy | Synonyms: chemotherapeutic |
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| chervil | (noun) fresh ferny parsley-like leaves used as a garnish with chicken and veal and omelets and green salads and spinach | - |
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| (noun) aromatic annual Old World herb cultivated for its finely divided and often curly leaves for use especially in soups and salads | Synonyms: Anthriscus cereifolium, beaked parsley |
| chiasmal | (adjective) of or relating to a chiasm | Synonyms: chiasmatic, chiasmic |
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| chill | (noun) coldness due to a cold environment | Synonyms: gelidity, iciness |
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| (noun) a sudden numbing dread | Synonyms: pall |
| (noun) an almost pleasurable sensation of fright | Synonyms: frisson, quiver, shiver, shudder, thrill, tingle |
| (noun) a sensation of cold that often marks the start of an infection and the development of a fever | Synonyms: shivering |
| (verb) loose heat | Synonyms: cool, cool down |
| (verb) make cool or cooler | Synonyms: cool, cool down |
| (verb) depress or discourage | - |
| chimeral | (adjective) being or relating to or like a chimera | Synonyms: chimeric, chimerical |
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| chimerical | (adjective) being or relating to or like a chimera | Synonyms: chimeral, chimeric |
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| (adjective) produced by a wildly fanciful imagination | - |
| chisel | (noun) an edge tool with a flat steel blade with a cutting edge | - |
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| (verb) carve with a chisel | - |
| (verb) engage in deceitful behavior; practice trickery or fraud | Synonyms: cheat |
| (verb) deprive somebody of something by deceit | Synonyms: cheat, rip off |
| chlamydial | (adjective) of or pertaining to the sexually transmitted infection or to the parasite | - |
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| chlorambucil | (noun) an alkylating agent (trade name Leukeran) used to treat some kinds of cancer | Synonyms: Leukeran |
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| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| chlorophyl | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyll |
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| chlorophyll | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyl |
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| chockful | (adjective) packed full to capacity | Synonyms: chock-full, chockablock, choke-full, chuck-full, cram full |
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| cholecalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, D, ergocalciferol, viosterol, vitamin D |
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| cholesterol | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterin |
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| choral | (adjective) related to or written for or performed by a chorus or choir | - |
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| (noun) a stately Protestant (especially Lutheran) hymn tune | Synonyms: chorale |
| chordal | (adjective) relating to or consisting of or emphasizing chords | - |
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| chromatographical | (adjective) of or relating to chromatography | Synonyms: chromatographic |
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| chromosomal | (adjective) of or relating to a chromosome | - |
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| chronological | (adjective) relating to or arranged according to temporal order | - |
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| chrysoberyl | (noun) a rare hard yellow green mineral consisting of beryllium aluminate in crystal form; used as a gemstone | - |
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| chunnel | (noun) the railroad tunnel between France and England under the English Channel | Synonyms: Channel Tunnel |
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| churl | (noun) a crude uncouth ill-bred person lacking culture or refinement | Synonyms: barbarian, boor, Goth, peasant, tike, tyke |
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| (noun) a bad-tempered person | Synonyms: crank, crosspatch, grouch, grump |
| (noun) a selfish person who is unwilling to give or spend | Synonyms: niggard, scrooge, skinflint |
| cilial | (adjective) of or relating to cilia projecting from the surface of a cell | Synonyms: ciliary, ciliate |
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| cinquefoil | (noun) an ornamental carving consisting of five arcs arranged in a circle | - |
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| (noun) any of a numerous plants grown for their five-petaled flowers; abundant in temperate regions; alleged to have medicinal properties | Synonyms: five-finger |
| circumboreal | (adjective) comprising or throughout far northern regions | Synonyms: boreal |
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| circumferential | (adjective) lying around or just outside the edges or outskirts | - |
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| circumstantial | (adjective) fully detailed and specific about particulars | - |
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| citadel | (noun) a stronghold into which people could go for shelter during a battle | Synonyms: bastion |
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| civil | (adjective) not rude; marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others | Synonyms: polite |
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| (adjective) (of divisions of time) legally recognized in ordinary affairs of life | - |
| (adjective) of or relating to or befitting citizens as individuals | Synonyms: civic |
| (adjective) of or occurring within the state or between or among citizens of the state | - |
| (adjective) applying to ordinary citizens as contrasted with the military | - |
| (adjective) of or in a condition of social order | - |
| cl | (adjective) being ten more than one hundred forty | Synonyms: 150, one hundred fifty |
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| (noun) a metric unit of volume equal to one hundredth of a liter | Synonyms: centiliter, centilitre |
| cladophyll | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladode, phylloclad, phylloclade |
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| clamatorial | (adjective) of or relating to Clamatores | - |
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| clamshell | (noun) the shell of a clam | - |
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| (noun) a dredging bucket with hinges like the shell of a clam | Synonyms: grapple |
| classical | (adjective) of or relating to the first significant period of a civilization, culture, area of study, etc. | Synonyms: classic |
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| (adjective) of or relating to the study of the literary works of ancient Greece and Rome | - |
| (adjective) of or relating to the languages used by ancient standard authors | - |
| (adjective) well-known and long-established in form or style | Synonyms: classic |
| (adjective) of or pertaining to or characteristic of the ancient Greeks and Romans, especially their art, literature, or culture | Synonyms: Graeco-Roman, Greco-Roman |
| (adjective) of or relating to music in the European tradition, such as symphonies and operas | - |
| (adjective) (physics) relating to or based on concepts that preceded the theories of relativity and quantum mechanics | - |
| (noun) traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste | Synonyms: classical music, serious music |
| clausal | (adjective) of or relating to or functioning as a clause | - |
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| clerical | (adjective) of or relating to the clergy | - |
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| (adjective) of or relating to clerks | - |
| (adjective) appropriate for or engaged in office work | - |
| climatical | (adjective) of or relating to a climate | Synonyms: climatic |
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| clinical | (adjective) relating to a clinic or conducted in or as if in a clinic and depending on direct observation of patients | - |
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| (adjective) scientifically detached; unemotional | - |
| clitoral | (adjective) of or relating to the clitoris | Synonyms: clitoric |
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| cloistral | (adjective) of communal life sequestered from the world under religious vows | Synonyms: cloistered, conventual, monastic, monastical |
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| clonal | (adjective) of or relating to a clone | - |
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| coal | (noun) a hot fragment of wood or coal that is left from a fire and is glowing or smoldering | Synonyms: ember |
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| (noun) fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period | - |
| (verb) take in coal | - |
| (verb) supply with coal | - |
| (verb) burn to charcoal | Synonyms: char |
| coastal | (adjective) located on or near or bordering on a coast | - |
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| (adjective) of or relating to a coast | - |
| (adjective) along or following a coast | Synonyms: coastwise |
| coattail | (noun) the loose back flap of a coat that hangs below the waist | - |
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| coaxal | (adjective) having a common axis | Synonyms: coaxial |
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| coaxial | (adjective) having a common axis | Synonyms: coaxal |
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| coccal | (adjective) of or pertaining to or resembling a coccus | - |
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| coccygeal | (adjective) of or relating to or near the coccyx | - |
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| cochineal | (noun) Mexican red scale insect that feeds on cacti; the source of a red dye | Synonyms: cochineal insect, Dactylopius coccus |
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| (noun) a red dyestuff consisting of dried bodies of female cochineal insects | - |
| cockateel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockatiel, cockatoo parrot, Nymphicus hollandicus |
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| cockatiel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockateel, cockatoo parrot, Nymphicus hollandicus |
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| cockerel | (noun) a young domestic cock; not older than one year | - |
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| cockleshell | (noun) a small light flimsy boat | - |
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| cocktail | (noun) a short mixed drink | - |
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| (noun) an appetizer served as a first course at a meal | - |
| codicil | (noun) a supplement to a will; a testamentary instrument intended to alter an already executed will | - |
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| coeducational | (adjective) attended by members of both sexes | Synonyms: co-ed |
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| coenobitical | (adjective) of or relating to or befitting cenobites or their practices of communal living | Synonyms: cenobitic, cenobitical, coenobitic |
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| coequal | (adjective) having the same standing before the law | - |
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| coeval | (adjective) of the same period | Synonyms: coetaneous, contemporaneous |
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| (noun) a person of nearly the same age as another | Synonyms: contemporary |
| cogwheel | (noun) a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion | Synonyms: gear, gear wheel, geared wheel |
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| coil | (noun) a structure consisting of something wound in a continuous series of loops | Synonyms: helix, spiral, volute, whorl |
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| (noun) reactor consisting of a spiral of insulated wire that introduces inductance into a circuit | - |
| (noun) tubing that is wound in a spiral | - |
| (noun) a contraceptive device placed inside a woman's womb | - |
| (noun) a transformer that supplies high voltage to spark plugs in a gasoline engine | - |
| (noun) a round shape formed by a series of concentric circles (as formed by leaves or flower petals) | Synonyms: curl, curlicue, gyre, ringlet, roll, scroll, whorl |
| (verb) wind around something in coils or loops | Synonyms: curl, loop |
| (verb) make without a potter's wheel | Synonyms: hand-build, handbuild |
| (verb) to wind or move in a spiral course | Synonyms: gyrate, spiral |
| coincidental | (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincident, coinciding, concurrent, cooccurring, simultaneous |
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| coital | (adjective) of or relating to coitus or copulation | Synonyms: copulatory |
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