| chrysomelid | (noun) brightly colored beetle that feeds on plant leaves; larvae infest roots and stems | Synonyms: leaf beetle |
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| chrysopid | (noun) pale green unpleasant-smelling lacewing fly having carnivorous larvae | Synonyms: green lacewing, stink fly |
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| churidars | (noun) tight trousers worn by people from the Indian subcontinent (typically with a kameez or kurta) | - |
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| cichlid | (noun) freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums | Synonyms: cichlid fish |
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| cider | (noun) a beverage made from juice pressed from apples | Synonyms: cyder |
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| ciderpress | (noun) a press that is used to extract the juice from apples | - |
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| cimetidine | (noun) a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid | Synonyms: Tagamet |
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| citywide | (adjective) occurring or extending throughout a city | - |
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| clerid | (noun) predacious on other insects; usually brightly colored or metallic | Synonyms: clerid beetle |
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| clinid | (noun) mostly small blennioid fishes of coral reefs and seagrass beds | Synonyms: clinid fish |
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| clitoridectomy | (noun) excision of the clitoris | Synonyms: female circumcision |
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| clonidine | (noun) an antihypertensive (trade name Catapres) that can be administered orally or via transdermal patches | Synonyms: Catapres |
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| clostridia | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridium |
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| clostridium | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridia |
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| clupeid | (noun) any of numerous soft-finned schooling food fishes of shallow waters of northern seas | Synonyms: clupeid fish |
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| cnidarian | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: coelenterate |
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| coccidioidomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidiomycosis, desert rheumatism, valley fever |
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| coccidiomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidioidomycosis, desert rheumatism, valley fever |
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| coccidiosis | (noun) (veterinary medicine) infestation with coccidia | - |
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| coccidium | (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates | Synonyms: eimeria |
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| coccoid | (adjective) spherical; like a coccus | - |
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| coincide | (verb) happen simultaneously | Synonyms: concur |
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| (verb) go with, fall together | Synonyms: co-occur, cooccur |
| (verb) be the same | - |
| coincidence | (noun) the temporal property of two things happening at the same time | Synonyms: co-occurrence, concurrence, conjunction |
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| (noun) the quality of occupying the same position or area in space | - |
| (noun) an event that might have been arranged although it was really accidental | Synonyms: happenstance |
| coincident | (adjective) matching point for point | - |
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| (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincidental, coinciding, concurrent, cooccurring, simultaneous |
| coincidental | (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincident, coinciding, concurrent, cooccurring, simultaneous |
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| coincidentally | (adverb) happening at the same time | Synonyms: coincidently |
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| coincidently | (adverb) happening at the same time | Synonyms: coincidentally |
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| coinciding | (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincident, coincidental, concurrent, cooccurring, simultaneous |
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| collide | (verb) crash together with violent impact | Synonyms: clash |
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| (verb) cause to collide | - |
| (verb) be incompatible; be or come into conflict | Synonyms: clash, jar |
| collider | (noun) an accelerator in which two beams of particles are forced to collide head on | - |
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| colloid | (noun) a mixture with properties between those of a solution and fine suspension | - |
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| colloidal | (adjective) of or relating to or having the properties of a colloid | - |
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| colloidally | (adverb) in a colloidal manner | - |
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| colubrid | (noun) mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes | Synonyms: colubrid snake |
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| comatulid | (noun) free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms | Synonyms: feather star |
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| conchoid | (noun) Any of a family of curves defined as the locus of points p, such that each p is on a line that passes through a given fixed point P and intersects a given curve, C, and the distance from p to the point of intersection with C is a specified constant (note that for nontrivial cases two such points p satisfy the criteria, and the resultant curve has two parts). | - |
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| confidant | (noun) someone to whom private matters are confided | Synonyms: intimate |
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| confidante | (noun) a female confidant | - |
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| confide | (verb) reveal in private; tell confidentially | - |
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| (verb) confer a trust upon | Synonyms: commit, entrust, intrust, trust |
| confidence | (noun) freedom from doubt; belief in yourself and your abilities | Synonyms: assurance, authority, self-assurance, self-confidence, sureness |
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| (noun) a secret that is confided or entrusted to another | - |
| (noun) a feeling of trust (in someone or something) | - |
| (noun) a state of confident hopefulness that events will be favorable | - |
| (noun) a trustful relationship | Synonyms: trust |
| confident | (adjective) having or marked by confidence or assurance | - |
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| (adjective) not liable to error in judgment or action | Synonyms: sure-footed, surefooted |
| (adjective) persuaded of; very sure | Synonyms: convinced, positive |
| confidential | (adjective) the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified | - |
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| (adjective) denoting confidence or intimacy | - |
| (adjective) entrusted with private information and the confidence of another | - |
| (adjective) (of information) given in confidence or in secret | Synonyms: secret |
| confidentiality | (noun) discretion in keeping secret information | - |
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| (noun) the state of being secret | - |
| confidentially | (adverb) in a confidential manner | - |
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| confidently | (adverb) with confidence; in a confident manner | - |
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| confiding | (adjective) willing to entrust personal matters | - |
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| confidingly | (adverb) with trust; in a trusting manner | Synonyms: trustfully, trustingly |
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| conidiophore | (noun) a specialized fungal hypha that produces conidia | - |
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| conidiospore | (noun) an asexually produced fungal spore formed on a conidiophore | Synonyms: conidium |
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| conidium | (noun) an asexually produced fungal spore formed on a conidiophore | Synonyms: conidiospore |
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| conoid | (noun) a shape whose base is a circle and whose sides taper up to a point | Synonyms: cone, cone shape |
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| consider | (verb) deem to be | Synonyms: reckon, regard, see, view |
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| (verb) take into consideration for exemplifying purposes | Synonyms: deal, look at, take |
| (verb) regard or treat with consideration, respect, and esteem | - |
| (verb) judge or regard; look upon; judge | Synonyms: believe, conceive, think |
| (verb) show consideration for; take into account | Synonyms: count, weigh |
| (verb) think about carefully; weigh | Synonyms: debate, deliberate, moot, turn over |
| (verb) give careful consideration to | Synonyms: study |
| (verb) look at attentively | Synonyms: regard |
| (verb) look at carefully; study mentally | Synonyms: look at, view |
| considerable | (adjective) large or relatively large in number or amount or extent or degree | - |
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| considerably | (adverb) to a great extent or degree | Synonyms: substantially, well |
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| considerate | (adjective) showing concern for the rights and feelings of others | - |
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| considerately | (adverb) in a considerate manner | - |
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| considerateness | (noun) kind and considerate regard for others | Synonyms: consideration, thoughtfulness |
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| consideration | (noun) a considerate and thoughtful act | Synonyms: thoughtfulness |
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| (noun) kind and considerate regard for others | Synonyms: considerateness, thoughtfulness |
| (noun) the process of giving careful thought to something | - |
| (noun) information that should be kept in mind when making a decision | Synonyms: circumstance, condition |
| (noun) a discussion of a topic (as in a meeting) | - |
| (noun) a fee charged in advance to retain the services of someone | Synonyms: retainer |
| considered | (adjective) carefully weighed | - |
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| consolidate | (verb) unite into one | - |
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| (verb) bring together into a single whole or system | - |
| (verb) make firm or secure; strengthen | - |
| (verb) make or form into a solid or hardened mass | - |
| (verb) form into a solid mass or whole | - |
| consolidated | (adjective) forming a solid mass | - |
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| (adjective) joined together into a whole | Synonyms: amalgamate, amalgamated, coalesced, fused |
| consolidation | (noun) the act of combining into an integral whole | Synonyms: integration |
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| (noun) combining into a solid mass | - |
| (noun) something that has consolidated into a compact mass | - |
| consolidative | (adjective) tending to consolidate | Synonyms: integrative |
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| (adjective) combining into a single unit | Synonyms: unifying |
| coreid | (noun) a true bug | Synonyms: coreid bug |
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| corrida | (noun) a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators | Synonyms: bullfight |
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| corridor | (noun) an enclosed passageway; rooms usually open onto it | - |
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| corticoid | (noun) a steroid hormone produced by the adrenal cortex or synthesized; administered as drugs they reduce swelling and decrease the body's immune response | Synonyms: adrenal cortical steroid, corticosteroid |
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| corticosteroid | (noun) a steroid hormone produced by the adrenal cortex or synthesized; administered as drugs they reduce swelling and decrease the body's immune response | Synonyms: adrenal cortical steroid, corticoid |
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| cosmid | (noun) (genetics) a large vector that is made from a bacteriophage and used to clone genes or gene fragments | - |
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| cotyloid | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: acetabular, cotyloidal |
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| cotyloidal | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: acetabular, cotyloid |
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| counterevidence | (noun) (philosophy, law, sciences) Evidence which tends to disprove a claim or hypothesis. | Synonyms: counter-evidence |
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| countryside | (noun) rural regions | - |
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| countrywide | (adjective) occurring or extending throughout a country or nation | Synonyms: nationwide |
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| countywide | (adjective) occurring or extending throughout a county | - |
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| cowhide | (noun) a heavy flexible whip braided from leather made from the hide of a cow | - |
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| (noun) leather made from the hide of a cow | Synonyms: cowskin |
| (noun) the hide of a cow | - |
| (verb) flog with a cowhide | - |
| crinoid | (adjective) of or relating to or belonging to the class Crinoidea | - |
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| (noun) primitive echinoderms having five or more feathery arms radiating from a central disk | - |
| cryptorchidism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidy, cryptorchism |
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| cryptorchidy | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchism |
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| ctenidium | (noun) comb-like respiratory structure serving as the gill of certain mollusks | - |
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| ctenoid | (adjective) resembling a comb; having projections like the teeth of a comb | Synonyms: comb-like |
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| cuboid | (adjective) shaped like a cube | Synonyms: cube-shaped, cubelike, cubical, cubiform, cuboidal |
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| (noun) a rectangular parallelepiped | - |
| cuboidal | (adjective) shaped like a cube | Synonyms: cube-shaped, cubelike, cubical, cubiform, cuboid |
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| cupid | (noun) a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow | - |
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| cupidity | (noun) extreme greed for material wealth | Synonyms: avarice, avariciousness, covetousness |
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| curbside | (noun) the side of a sidewalk that is bordered by a curb | - |
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| cuspid | (noun) one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars | Synonyms: canine, canine tooth, dogtooth, eye tooth, eyetooth |
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| cuspidal | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidate, cuspidated |
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| cuspidate | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidal, cuspidated |
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| cuspidated | (adjective) having cusps or points | Synonyms: cuspate, cuspated, cusped, cuspidal, cuspidate |
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| cuspidation | (noun) a decoration using cusps | - |
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| cuspidor | (noun) a receptacle for spit (usually in a public place) | Synonyms: spittoon |
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| cyanamid | (noun) a weak soluble dibasic acid (the parent acid of cyanamide salts) | Synonyms: cyanamide |
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| cyanamide | (noun) a weak soluble dibasic acid (the parent acid of cyanamide salts) | Synonyms: cyanamid |
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| (noun) a compound used as a fertilizer and as a source of nitrogen compounds | Synonyms: calcium-cyanamide |
| cyanide | (noun) an extremely poisonous salt of hydrocyanic acid | - |
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| (noun) any of a class of organic compounds containing the cyano radical -CN | Synonyms: nitril, nitrile |
| cyanuramide | (noun) a white crystalline organic base; used mainly in making melamine resins | Synonyms: melamine |
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| cycloid | (adjective) resembling a circle | Synonyms: cycloidal |
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| (noun) a line generated by a point on a circle rolling along a straight line | - |
| cycloidal | (adjective) resembling a circle | Synonyms: cycloid |
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| cymbid | (noun) any of various plants of the genus Cymbidium having narrow leaves and a long drooping cluster of numerous showy and variously colored boat-shaped flowers; extensively hybridized and cultivated as houseplants and important florists' flowers | Synonyms: cymbidium |
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| cymbidium | (noun) any of various plants of the genus Cymbidium having narrow leaves and a long drooping cluster of numerous showy and variously colored boat-shaped flowers; extensively hybridized and cultivated as houseplants and important florists' flowers | Synonyms: cymbid |
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