| 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 |
| centennially | (adverb) every hundred years; once in a century | - |
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| center | (adjective) of or belonging to neither the right nor the left politically or intellectually | Synonyms: centre |
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| (adjective) equally distant from the extremes | Synonyms: centre, halfway, middle, midway |
| (noun) a position on a basketball team of the player who participates in the jump that starts the game | Synonyms: centre |
| (noun) (American football) the position of the player on the line of scrimmage who puts the ball in play | Synonyms: centre |
| (noun) the position on a hockey team of the player who participates in the face off at the beginning of the game | Synonyms: centre |
| (noun) a building dedicated to a particular activity | Synonyms: centre |
| (noun) mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace | Synonyms: centre, mall, plaza, shopping center, shopping centre, shopping mall |
| (noun) the piece of ground in the outfield directly ahead of the catcher | Synonyms: center field, centerfield, centre |
| (noun) a cluster of nerve cells governing a specific bodily process | Synonyms: centre, nerve center, nerve centre |
| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: centre, core, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| (noun) the object upon which interest and attention focuses | Synonyms: center of attention, centre, centre of attention |
| (noun) the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering | Synonyms: centre |
| (noun) politically moderate persons; centrists | Synonyms: centre |
| (noun) the middle of a military or naval formation | Synonyms: centre |
| (noun) a point equidistant from the ends of a line or the extremities of a figure | Synonyms: centre, midpoint |
| (noun) an area that is approximately central within some larger region | Synonyms: centre, eye, heart, middle |
| (noun) a place where some particular activity is concentrated | Synonyms: centre |
| (noun) (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback | Synonyms: centre, snapper |
| (noun) (basketball) the person who plays center on a basketball team | Synonyms: centre |
| (noun) (ice hockey) the person who plays center on a hockey team | Synonyms: centre |
| (verb) direct one's attention on something | Synonyms: centre, concentrate, focus, pore, rivet |
| (verb) move into the center | Synonyms: centre |
| (verb) center upon | Synonyms: center on, centre, concentrate on, focus on, revolve about, revolve around |
| centerboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centreboard, drop keel, sliding keel |
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| centered | (adjective) being or placed in the center | Synonyms: centred |
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| centerfield | (noun) the fielding position of the player on a baseball team who is expected to field balls in the central third of the outfield | Synonyms: center field |
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| (noun) the piece of ground in the outfield directly ahead of the catcher | Synonyms: center, center field, centre |
| centerfielder | (noun) the person who plays center field | Synonyms: center fielder |
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| centerfold | (noun) a magazine center spread; especially a foldout of a large photograph or map or other feature | Synonyms: centrefold |
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| centering | (noun) (American football) putting the ball in play by passing it (between the legs) to a back | Synonyms: centring, snap |
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| (noun) the concentration of attention or energy on something | Synonyms: centring, direction, focal point, focus, focusing, focussing |
| centerline | (noun) a line that bisects a plane figure | Synonyms: center line |
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| centerpiece | (noun) something placed at the center of something else (as on a table) | Synonyms: centrepiece |
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| (noun) the central or most important feature | Synonyms: centrepiece |
| 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 |
| centesimo | (noun) a fractional monetary unit of several countries: Panama and Italy and Uruguay and Chile | - |
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| centesis | (noun) (surgery) the act of puncturing a body cavity or organ with a hollow needle in order to draw out fluid | - |
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| centigrade | (adjective) of or relating to a temperature scale on which the freezing point of water is 0 degrees and the boiling point of water is 100 degrees | - |
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| centile | (noun) (statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total | Synonyms: percentile |
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| centiliter | (noun) a metric unit of volume equal to one hundredth of a liter | Synonyms: centilitre, cl |
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| centilitre | (noun) a metric unit of volume equal to one hundredth of a liter | Synonyms: centiliter, cl |
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| centime | (noun) a coin worth one-hundredth of the value of the basic unit | Synonyms: cent, penny |
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| (noun) a fractional monetary unit of several countries: France and Algeria and Belgium and Burkina Faso and Burundi and Cameroon and Chad and the Congo and Gabon and Haiti and the Ivory Coast and Luxembourg and Mali and Morocco and Niger and Rwanda and Senegal and Switzerland and Togo | - |
| centimeter | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimetre, cm |
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| centimetre | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimeter, cm |
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| centimo | (noun) a fractional monetary unit of Venezuela and Costa Rica and Equatorial Guinea and Paraguay and Spain | - |
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| centipede | (noun) chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors | - |
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| centner | (noun) a United States unit of weight equivalent to 100 pounds | Synonyms: cental, cwt, hundredweight, quintal, short hundredweight |
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| (noun) in some European countries: a unit of weight equivalent to 50 kilograms | - |
| (noun) a unit of weight equal to 100 kilograms in the metric system | Synonyms: doppelzentner, hundredweight, metric hundredweight |
| 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 |
| centralisation | (noun) the act of consolidating power under a central control | Synonyms: centralization |
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| (noun) gathering to a center | Synonyms: centralization |
| centralise | (verb) make central | Synonyms: centralize, concentrate |
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| centralised | (adjective) drawn toward a center or brought under the control of a central authority | Synonyms: centralized |
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| centralising | (adjective) tending to draw to a central point | Synonyms: centralizing |
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| centralism | (noun) the political policy of concentrating power in a central organization | - |
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| centralist | (adjective) advocating centralization | Synonyms: centralistic |
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| centralistic | (adjective) advocating centralization | Synonyms: centralist |
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| centrality | (noun) the property of being central | - |
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| centralization | (noun) the act of consolidating power under a central control | Synonyms: centralisation |
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| (noun) gathering to a center | Synonyms: centralisation |
| centralize | (verb) make central | Synonyms: centralise, concentrate |
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| centralized | (adjective) drawn toward a center or brought under the control of a central authority | Synonyms: centralised |
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| centralizing | (adjective) tending to draw to a central point | Synonyms: centralising |
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| centrally | (adverb) in or near or toward a center or according to a central role or function | - |
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| centrarchid | (noun) small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed | Synonyms: sunfish |
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| centre | (adjective) of or belonging to neither the right nor the left politically or intellectually | Synonyms: center |
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| (noun) a position on a basketball team of the player who participates in the jump that starts the game | Synonyms: center |
| (noun) (American football) the position of the player on the line of scrimmage who puts the ball in play | Synonyms: center |
| (noun) the position on a hockey team of the player who participates in the face off at the beginning of the game | Synonyms: center |
| (noun) a building dedicated to a particular activity | Synonyms: center |
| (noun) the piece of ground in the outfield directly ahead of the catcher | Synonyms: center, center field, centerfield |
| (noun) mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace | Synonyms: center, mall, plaza, shopping center, shopping centre, shopping mall |
| (noun) a cluster of nerve cells governing a specific bodily process | Synonyms: center, nerve center, nerve centre |
| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: center, core, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| (noun) the object upon which interest and attention focuses | Synonyms: center, center of attention, centre of attention |
| (noun) the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering | Synonyms: center |
| (noun) politically moderate persons; centrists | Synonyms: center |
| (noun) the middle of a military or naval formation | Synonyms: center |
| (noun) a point equidistant from the ends of a line or the extremities of a figure | Synonyms: center, midpoint |
| (noun) an area that is approximately central within some larger region | Synonyms: center, eye, heart, middle |
| (noun) a place where some particular activity is concentrated | Synonyms: center |
| (noun) (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback | Synonyms: center, snapper |
| (noun) (basketball) the person who plays center on a basketball team | Synonyms: center |
| (noun) (ice hockey) the person who plays center on a hockey team | Synonyms: center |
| (adjective) equally distant from the extremes | Synonyms: center, halfway, middle, midway |
| (verb) direct one's attention on something | Synonyms: center, concentrate, focus, pore, rivet |
| (verb) move into the center | Synonyms: center |
| (verb) center upon | Synonyms: center, center on, concentrate on, focus on, revolve about, revolve around |
| centreboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centerboard, drop keel, sliding keel |
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| centred | (adjective) being or placed in the center | Synonyms: centered |
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| centrefold | (noun) a magazine center spread; especially a foldout of a large photograph or map or other feature | Synonyms: centerfold |
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| centrepiece | (noun) something placed at the center of something else (as on a table) | Synonyms: centerpiece |
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| (noun) the central or most important feature | Synonyms: centerpiece |
| centrex | (noun) (CENTRal EXchange) a kind of telephone exchange | - |
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| centric | (adjective) having or situated at or near a center | Synonyms: centrical |
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| 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 |
| centrifugate | (verb) rotate at very high speed in order to separate the liquids from the solids | Synonyms: centrifuge |
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| centrifugation | (noun) the process of separating substances of different densities by the use of a centrifuge | - |
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| centrifuge | (noun) an apparatus that uses centrifugal force to separate particles from a suspension | Synonyms: extractor, separator |
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| (verb) rotate at very high speed in order to separate the liquids from the solids | Synonyms: centrifugate |
| centring | (noun) (American football) putting the ball in play by passing it (between the legs) to a back | Synonyms: centering, snap |
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| (noun) the concentration of attention or energy on something | Synonyms: centering, direction, focal point, focus, focusing, focussing |
| centriole | (noun) one of a pair of small cylindrical cell organelles near the nucleus in animal cells; composed of nine triplet microtubules and form the asters during mitosis | - |
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| 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 |
| centrism | (noun) a political philosophy of avoiding the extremes of left and right by taking a moderate position or course of action | Synonyms: moderatism |
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| centrist | (adjective) supporting or pursuing a course of action that is neither liberal nor conservative | Synonyms: middle-of-the-road |
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| (noun) a person who takes a position in the political center | Synonyms: middle of the roader, moderate, moderationist |
| centroid | (noun) the center of mass of an object of uniform density | - |
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| centroidal | (adjective) of or relating to (especially passing through) a centroid | - |
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| centromere | (noun) a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape | Synonyms: kinetochore |
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| centromeric | (adjective) pertaining to the dense specialized portion of a chromosome to which the spindle attaches during mitosis | - |
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| centrosome | (noun) small region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules | Synonyms: central body |
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| centrosomic | (adjective) of or relating to a centrosome | - |
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| centrosymmetric | (adjective) having a symmetrical arrangement of radiating parts about a central point | Synonyms: radially symmetrical |
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| centrum | (noun) the main body of a vertebra | - |
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| centurion | (noun) (ancient Rome) the leader of 100 soldiers | - |
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| century | (noun) ten 10s | Synonyms: 100, C, hundred, one C |
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| (noun) a period of 100 years | - |
| cephalalgia | (noun) pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs | Synonyms: head ache, headache |
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| cephalaspid | (noun) extinct jawless fish of the Devonian with armored head | Synonyms: osteostracan |
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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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| cephalhematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalohematoma |
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| cephalic | (adjective) of or relating to the head | - |
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| cephalitis | (noun) inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use) | Synonyms: encephalitis, phrenitis |
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| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| cephaloglycin | (noun) antibiotic related to cephalosporin but no longer in common use | Synonyms: Kafocin |
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| cephalohematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalhematoma |
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| cephalometry | (noun) measurement of human heads | - |
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| cephalopod | (adjective) relating or belonging to the class Cephalopoda | Synonyms: cephalopodan |
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| (noun) marine mollusk characterized by well-developed head and eyes and sucker-bearing tentacles | Synonyms: cephalopod mollusk |
| cephalopodan | (adjective) relating or belonging to the class Cephalopoda | Synonyms: cephalopod |
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| cephaloridine | (noun) a broad spectrum semisynthetic antibiotic produced by modifying cephalosporin | - |
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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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| ceramic | (adjective) of or relating to or made from a ceramic | - |
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| (noun) an artifact made of hard brittle material produced from nonmetallic minerals by firing at high temperatures | - |
| ceramicist | (noun) a craftsman who shapes pottery on a potter's wheel and bakes them in a kiln | Synonyms: ceramist, potter, thrower |
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| ceramics | (noun) the art of making and decorating pottery | - |
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| ceramist | (noun) a craftsman who shapes pottery on a potter's wheel and bakes them in a kiln | Synonyms: ceramicist, potter, thrower |
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| ceras | (noun) one of the often brightly colored and branching hornlike structures on the back of the nudibranch (and other related mollusks) that serve as gills | - |
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| cerastes | (noun) highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye | Synonyms: Cerastes cornutus, horned asp, horned viper, sand viper |
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| cerate | (noun) a hard medicated paste made of lard or oil mixed with wax or resin | - |
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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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| ceratodus | (noun) extinct lungfish | - |
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| ceratopsian | (noun) any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia | Synonyms: horned dinosaur |
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| ceratosaur | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaurus |
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| ceratosaurus | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaur |
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| ceratozamia | (noun) a small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones; Mexico | - |
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| cercaria | (noun) tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage | - |
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| cercarial | (adjective) of or relating to cercaria | - |
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| cere | (noun) the fleshy, waxy covering at the base of the upper beak of some birds | - |
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| (verb) wrap up in a cerecloth | - |
| 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 |
| cerebellar | (adjective) relating to or associated with the cerebellum | - |
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| cerebellum | (noun) a major division of the vertebrate brain; situated above the medulla oblongata and beneath the cerebrum in humans | - |
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