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Glossary · Nouns · C

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TermTypeDefinitionClassificationsUpdated
Cynophobianouna fear of dogsverifiedMay 18, 2026
Cynosurenounsomething that provides guidance (as Polaris guides mariners)verifiedMay 18, 2026
Cynthia MothnounMWElarge Asiatic moth introduced into the United StatesverifiedMay 18, 2026
Cypressnounany of numerous evergreen conifers of the genus Cupressus of north temperate regions having dark scalelike leaves and rounded conesverifiedMay 18, 2026
Cypress FamilynounMWEcypresses and junipers and many cedarsverifiedMay 18, 2026
Cypress PinenounMWEany of several evergreen trees or shrubs of Australia and northern New CaledoniaverifiedMay 18, 2026
Cypress SedgenounMWEtufted sedge of temperate regionsverifiedMay 18, 2026
Cypress SpurgenounMWEOld World perennial having foliage resembling cypressverifiedMay 18, 2026
Cypress TreenounMWEany of numerous evergreen conifers of the genus Cupressus of north temperate regions having dark scalelike leaves and rounded conesverifiedMay 18, 2026
Cypress VinenounMWEtropical American annual climber having red or white flowers and finely dissected leavesverifiedMay 18, 2026
Cyprinid FishnounMWEsoft-finned mainly freshwater fishes typically having toothless jaws and cycloid scalesverifiedMay 18, 2026
Cypriniform FishnounMWEa soft-finned fish of the order CypriniformesverifiedMay 18, 2026
Cyprinodontnounany member of the family CyprinodontidaeverifiedMay 18, 2026
Cypripedianouna plant or flower of the genus CypripediumverifiedMay 18, 2026
Cyproheptadinenounan antihistamine (trade name Periactin) used to treat some allergic reactionsverifiedMay 18, 2026
Cyrillanounshrub or small tree of southeastern United States to West Indies and BrazilverifiedMay 18, 2026
Cyrilla FamilynounMWEshrubs and trees with leathery leaves and small white flowers in racemes: genera Cyrilla and CliftoniaverifiedMay 18, 2026
Cystnouna small and anatomically normal sac or bladderlike structure, especially one containing fluidverifiedMay 18, 2026
Cystic ArterynounMWEa branch of the hepatic arteryverifiedMay 18, 2026
Cystic Breast DiseasenounMWEthe presence of one or more cysts in a breastverifiedMay 18, 2026
Cystic FibrosisnounMWEan inherited disease which causes secreted fluids in the body to become abnormally sticky and thick, commonly affecting the respiratory and digestive systemsverifiedMay 18, 2026
Cystic Fibrosis Transport RegulatornounMWEthe gene that is mutated in cystic fibrosisverifiedMay 18, 2026
Cystic MastitisnounMWEthe presence of one or more cysts in a breastverifiedMay 18, 2026
Cystic VeinnounMWEvein that drains the gallbladderverifiedMay 18, 2026
Cystinenouna crystalline amino acid found in proteins (especially keratin)verifiedMay 18, 2026
Cystitisnouninflammation of the urinary bladder and uretersverifiedMay 18, 2026
Cystocelenounhernia in which the urinary bladder protrudes through the wall of the vaginaverifiedMay 18, 2026
Cystoid Macular EdemanounMWEa specific pattern of swelling in the central retinaverifiedMay 18, 2026
Cystolithnouna calculus formed in the bladderverifiedMay 18, 2026
Cystoparalysisnounparalysis of the urinary bladderverifiedMay 18, 2026
Cystoplegianounparalysis of the urinary bladderverifiedMay 18, 2026
Cytidinenouna nucleoside component of DNAverifiedMay 18, 2026
Cytoarchitectonicsnounthe cellular composition of a bodily structureverifiedMay 18, 2026
Cytoarchitecturenounthe cellular composition of a bodily structureverifiedMay 18, 2026
Cytochromenoun(biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)verifiedMay 18, 2026
Cytochrome CnounMWEthe most abundant and stable cytochromeverifiedMay 18, 2026
Cytogenesisnounthe origin and development and variation of cellsverifiedMay 18, 2026
Cytogeneticistnouna geneticist who specializes in the cellular components associated with heredityverifiedMay 18, 2026
Cytogeneticsnounthe branch of biology that studies the cellular aspects of heredity (especially the chromosomes)verifiedMay 18, 2026
Cytogenynounthe origin and development and variation of cellsverifiedMay 18, 2026
Cytokinenounany of various protein molecules secreted by cells of the immune system that serve to regulate the immune systemverifiedMay 18, 2026
Cytokinesisnounorganic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cellsverifiedMay 18, 2026
Cytokininnounany of a class of plant hormones that promote cell division and delay the senescence of leavesverifiedMay 18, 2026
Cytolnounthe protoplasm of a cell excluding the nucleusverifiedMay 18, 2026
Cytologic SmearnounMWEa thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscopeverifiedMay 18, 2026
Cytologistnouna biologist who studies the structure and function of cellsverifiedMay 18, 2026
Cytologynounthe branch of biology that studies the structure and function of cellsverifiedMay 18, 2026
Cytolysinnouna substance that partly or completely destroys animal cellsverifiedMay 18, 2026
Cytolysisnounpathological breakdown of cells by the destruction of their outer membraneverifiedMay 18, 2026
Cytomegalovirusnounany of a group of herpes viruses that enlarge epithelial cells and can cause birth defectsverifiedMay 18, 2026
Cytomembranenouna thin membrane (a double layer of lipids) enclosing the cytoplasm of a cellverifiedMay 18, 2026
Cytopenianouna deficiency of some cellular element of the bloodverifiedMay 18, 2026
Cytophotometernouna photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasmverifiedMay 18, 2026
Cytophotometrynounthe study of chemical compounds inside a cell by means of a cytophotometerverifiedMay 18, 2026
Cytoplasmnounthe protoplasm of a cell excluding the nucleusverifiedMay 18, 2026
Cytoplastnounthe intact cytoplasmic content of a cellverifiedMay 18, 2026
Cytosinenouna base found in DNA and RNA and derived from pyrimidineverifiedMay 18, 2026
Cytoskeletonnouna microscopic network of actin filaments and microtubules in the cytoplasm of many living cells that gives the cell shape and coherenceverifiedMay 18, 2026
Cytosmearnouna thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscopeverifiedMay 18, 2026
Cytosolnounthe aqueous part of the cytoplasm within which various particles and organelles are suspendedverifiedMay 18, 2026
Cytostomenounmouth of a protozoanverifiedMay 18, 2026
Cytotoxic DrugnounMWEany drug that has a toxic effect on cellsverifiedMay 18, 2026
Cytotoxic T CellnounMWET cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill itverifiedMay 18, 2026
Cytotoxicitynounthe degree to which something is toxic to living cellsverifiedMay 18, 2026
Cytotoxinnounany substance that has a toxic effect on cellsverifiedMay 18, 2026
Czarnouna male Slavic monarch or emperor, most commonly used with regard to Russia prior to 1917verifiedMay 18, 2026
Czarinanounthe wife or widow of a czarverifiedMay 18, 2026
Czaritzanounthe wife or widow of a czarverifiedMay 18, 2026