| cyproheptadine | (noun) an antihistamine (trade name Periactin) used to treat some allergic reactions | Synonyms: Periactin |
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| cyrilla | (noun) shrub or small tree of southeastern United States to West Indies and Brazil; grown for the slender racemes of white flowers and orange and crimson foliage | Synonyms: Cyrilla racemiflora, leatherwood, white titi |
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| cyst | (noun) a small anatomically normal sac or bladderlike structure (especially one containing fluid) | Synonyms: vesicle |
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| (noun) a closed sac that develops abnormally in some body structure | - |
| cysteine | (noun) an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine | - |
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| cystic | (adjective) of or relating to or resembling a cyst | - |
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| (adjective) of or relating to a normal cyst (as the gallbladder or urinary bladder) | - |
| cystine | (noun) a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones | - |
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| cystitis | (noun) inflammation of the urinary bladder and ureters | - |
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| cystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: colpocystocele |
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| cystolith | (noun) a calculus formed in the bladder | Synonyms: bladder stone |
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| cystoparalysis | (noun) paralysis of the urinary bladder | Synonyms: cystoplegia |
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| cystoplegia | (noun) paralysis of the urinary bladder | Synonyms: cystoparalysis |
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| cytidine | (noun) a nucleoside component of DNA; composed of cytosine and deoxyribose | Synonyms: deoxycytidine |
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| cytoarchitectonic | (adjective) of or relating to cytoarchitecture | Synonyms: cytoarchitectural |
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| cytoarchitectonics | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitecture |
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| cytoarchitectural | (adjective) of or relating to cytoarchitecture | Synonyms: cytoarchitectonic |
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| cytoarchitecture | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitectonics |
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| cytochrome | (noun) (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) | - |
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| cytogenesis | (noun) the origin and development and variation of cells | Synonyms: cytogeny |
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| cytogenetic | (adjective) of or relating to cytogenetics | Synonyms: cytogenetical |
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| cytogenetical | (adjective) of or relating to cytogenetics | Synonyms: cytogenetic |
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| cytogeneticist | (noun) a geneticist who specializes in the cellular components associated with heredity | - |
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| cytogenetics | (noun) the branch of biology that studies the cellular aspects of heredity (especially the chromosomes) | - |
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| cytogeny | (noun) the origin and development and variation of cells | Synonyms: cytogenesis |
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| cytokine | (noun) any of various protein molecules secreted by cells of the immune system that serve to regulate the immune system | - |
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| cytokinesis | (noun) organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells | - |
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| cytokinetic | (adjective) of or relating to the division of the cytoplasm of a cell following the division of the nucleus | - |
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| cytokinin | (noun) any of a class of plant hormones that promote cell division and delay the senescence of leaves | Synonyms: kinin |
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| cytol | (noun) the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism | Synonyms: cytoplasm |
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| cytologic | (adjective) of or relating to the science of cytology | Synonyms: cytological |
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| cytological | (adjective) of or relating to the science of cytology | Synonyms: cytologic |
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| cytologist | (noun) a biologist who studies the structure and function of cells | - |
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| cytology | (noun) the branch of biology that studies the structure and function of cells | - |
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| cytolysin | (noun) a substance that partly or completely destroys animal cells | - |
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| cytolysis | (noun) pathological breakdown of cells by the destruction of their outer membrane | - |
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| cytolytic | (adjective) of or relating to cytolysis, the dissolution or destruction of a cell | - |
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| cytomegalic | (adjective) of or relating to or characterized by greatly enlarged cells | - |
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| cytomegalovirus | (noun) any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems | Synonyms: CMV |
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| cytomembrane | (noun) a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell | Synonyms: cell membrane, plasma membrane |
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| cytopathogenic | (adjective) of or relating to or causing pathological changes in cells | - |
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| cytopenia | (noun) a deficiency of some cellular element of the blood | - |
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| cytophotometer | (noun) a 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 cytoplasm | - |
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| cytophotometric | (adjective) of or relating to the study of cells by means of a cytophotometer | - |
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| cytophotometrically | (adverb) by cytophotometric means | - |
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| cytophotometry | (noun) the study of chemical compounds inside a cell by means of a cytophotometer | - |
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| cytoplasm | (noun) the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism | Synonyms: cytol |
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| cytoplasmatic | (adjective) of or relating to cytoplasm | Synonyms: cytoplasmic |
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| cytoplasmic | (adjective) of or relating to cytoplasm | Synonyms: cytoplasmatic |
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| cytoplasmically | (adverb) by means of cytoplasm | - |
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| cytoplast | (noun) the intact cytoplasmic content of a cell | - |
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| cytoplastic | (adjective) of or relating to a cytoplast | - |
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| cytosine | (noun) a base found in DNA and RNA and derived from pyrimidine; pairs with guanine | Synonyms: C |
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| cytoskeleton | (noun) a microscopic network of actin filaments and microtubules in the cytoplasm of many living cells that gives the cell shape and coherence | - |
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| cytosmear | (noun) a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope | Synonyms: cytologic smear, smear |
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| cytosol | (noun) the aqueous part of the cytoplasm within which various particles and organelles are suspended | - |
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| cytostome | (noun) mouth of a protozoan | - |
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| cytotoxic | (adjective) of or relating to substances that are toxic to cells | - |
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| cytotoxicity | (noun) the degree to which something is toxic to living cells | - |
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| cytotoxin | (noun) any substance that has a toxic effect on cells | - |
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