| cocaine | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocain |
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| codeine | (noun) derivative of opium; used as an antitussive (to relieve coughing) and an analgesic (to relieve pain) | - |
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| colchicine | (noun) an analgesic drug derived from the saffron plant and used to treat gout | - |
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| columbine | (noun) a plant of the genus Aquilegia having irregular showy spurred flowers; north temperate regions especially mountains | Synonyms: aquilege, aquilegia |
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| combine | (noun) harvester that heads and threshes and cleans grain while moving across the field | - |
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| (noun) an occurrence that results in things being united | Synonyms: combining |
| (noun) a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service | Synonyms: cartel, corporate trust, trust |
| compline | (noun) last of the seven canonical hours just before retiring | Synonyms: complin |
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| concubine | (noun) a woman who cohabits with an important man | Synonyms: courtesan, doxy, paramour |
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| copaline | (noun) partly mineralized copal dug from the ground | Synonyms: copalite, fossil copal |
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| cosine | (noun) ratio of the adjacent side to the hypotenuse of a right-angled triangle | Synonyms: cos |
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| countermine | (noun) (military) a tunnel dug to defeat similar activities by the enemy | - |
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| creatine | (noun) an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine; supplies energy for muscle contraction | Synonyms: creatin |
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| crinoline | (noun) a stiff coarse fabric used to stiffen hats or clothing | - |
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| (noun) a full stiff petticoat made of crinoline fabric | - |
| (noun) a skirt stiffened with hoops | Synonyms: hoopskirt |
| cuisine | (noun) the practice or manner of preparing food or the food so prepared | Synonyms: culinary art |
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| cyclobenzaprine | (noun) muscle relaxant (trade name Flexeril) used for muscle spasms or acute injury | Synonyms: Flexeril |
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| cycloserine | (noun) an antibiotic that is especially active against the tubercle bacillus | - |
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| cyproheptadine | (noun) an antihistamine (trade name Periactin) used to treat some allergic reactions | Synonyms: Periactin |
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| 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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| cystine | (noun) a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones | - |
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| cytidine | (noun) a nucleoside component of DNA; composed of cytosine and deoxyribose | Synonyms: deoxycytidine |
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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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| cytosine | (noun) a base found in DNA and RNA and derived from pyrimidine; pairs with guanine | Synonyms: C |
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| dateline | (noun) a line at the beginning of a news article giving the date and place of origin of the news dispatch | - |
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| (noun) an imaginary line on the surface of the earth following (approximately) the 180th meridian | Synonyms: date line, International Date Line |
| deadline | (noun) the point in time at which something must be completed | - |
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| decline | (noun) a downward slope or bend | Synonyms: declension, declination, declivity, descent, downslope, fall |
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| (noun) a gradual decrease; as of stored charge or current | Synonyms: decay |
| (noun) change toward something smaller or lower | Synonyms: diminution |
| (noun) a condition inferior to an earlier condition; a gradual falling off from a better state; decline | Synonyms: declination |
| delavirdine | (noun) a non-nucleoside reverse transcriptase inhibitor (trade name Rescriptor) used to treat AIDS and HIV | Synonyms: Rescriptor |
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| demimondaine | (noun) a female prostitute | - |
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| dentine | (noun) bone (calcified tissue) surrounding the pulp cavity of a tooth | Synonyms: dentin |
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| (noun) a calcareous material harder and denser than bone that comprises the bulk of a tooth | Synonyms: dentin |
| deoxyadenosine | (noun) a nucleoside component of DNA; composed of adenosine and deoxyribose | - |
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| deoxycytidine | (noun) a nucleoside component of DNA; composed of cytosine and deoxyribose | Synonyms: cytidine |
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| deoxyephedrine | (noun) an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant | Synonyms: chalk, chicken feed, crank, glass, ice, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu, trash |
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| deoxyguanosine | (noun) a nucleoside component of DNA; composed of guanine and deoxyribose | Synonyms: guanosine |
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| deoxythymidine | (noun) a nucleoside component of DNA; composed of thymine and deoxyribose | Synonyms: thymidine |
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| desipramine | (noun) a tricyclic antidepressant drug that activates the psychomotor system | - |
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| dessiatine | (noun) a former Russian unit of area equal to 2.7 acres | - |
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| diacetylmorphine | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: heroin |
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| diamine | (noun) any organic compound containing two amino groups | - |
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| dibucaine | (noun) a local anesthetic that is administered by injection | - |
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| didanosine | (noun) an antiviral drug used to combat HIV infection, a reverse transcriptase inhibitor | Synonyms: ddI, DDI, dideoxyinosine |
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| dideoxycytosine | (noun) an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI) | Synonyms: ddC, DDC, zalcitabine |
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| dideoxyinosine | (noun) an antiviral drug used to combat HIV infection, a reverse transcriptase inhibitor | Synonyms: ddI, DDI, didanosine |
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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| diphenhydramine | (noun) antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness | Synonyms: Benadryl |
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| discipline | (noun) training to improve strength or self-control | - |
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| (noun) the act of disciplining | Synonyms: correction |
| (noun) the trait of being well behaved | - |
| (noun) a branch of knowledge | Synonyms: bailiwick, field, field of study, study, subject, subject area, subject field |
| (noun) a system of rules of conduct or method of practice | - |
| divine | (noun) a clergyman or other person in religious orders | Synonyms: churchman, cleric, ecclesiastic |
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| doctrine | (noun) a belief (or system of beliefs) accepted as authoritative by some group or school | Synonyms: ism, philosophical system, philosophy, school of thought |
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| domine | (noun) a clergyman; especially a settled minister or parson | Synonyms: dominee, dominie, dominus |
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| dopamine | (noun) a monoamine neurotransmitter found in the brain and essential for the normal functioning of the central nervous system; as a drug (trade names Dopastat and Intropin) it is used to treat shock and hypotension | Synonyms: Dopastat, Intropin |
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| doxycycline | (noun) an antibiotic derived from tetracycline that is effective against many infections | Synonyms: Vibramycin |
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| dropline | (noun) a headline with the top line flush left and succeeding lines indented to the right | Synonyms: drop line, stagger head, staggered head, stephead, stepped line |
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| dryopithecine | (noun) considered a possible ancestor to both anthropoid apes and humans | - |
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| eglantine | (noun) Eurasian rose with prickly stems and fragrant leaves and bright pink flowers followed by scarlet hips | Synonyms: briar, brier, Rosa eglanteria, sweetbriar, sweetbrier |
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| enamine | (noun) an amine containing the double bond linkage -C=C-N- | - |
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| endocrine | (noun) the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect | Synonyms: hormone, internal secretion |
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| (noun) any of the glands of the endocrine system that secrete hormones directly into the bloodstream | Synonyms: ductless gland, endocrine gland |
| engine | (noun) motor that converts thermal energy to mechanical work | - |
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| (noun) a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks | Synonyms: locomotive, locomotive engine, railway locomotive |
| (noun) an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc. | - |
| (noun) something used to achieve a purpose | - |
| ephedrine | (noun) white odorless powdered or crystalline alkaloid from plants of the genus Ephedra (especially Ephedra sinica) or made synthetically; used as a bronchodilator to treat bronchitis and asthma | - |
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| epinephrine | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, adrenaline, epinephrin |
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| equine | (noun) hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck | Synonyms: equid |
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| ergonovine | (noun) an alkaloid derived from ergot (trade name Ergotrate Maleate) that is less toxic than ergot; induces muscular contraction of the uterus and is administered after childbirth or abortion | Synonyms: Ergotrate Maleate |
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| ergotamine | (noun) an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine | - |
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| ergotine | (noun) a powerful astringent alkaloid extracted from ergot as a brown, amorphous, bitter substance, used to produce contraction of the uterus. | - |
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| ermine | (noun) mustelid of Northern Hemisphere in its white winter coat | Synonyms: Mustela erminea, shorttail weasel |
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| (noun) the expensive white fur of the ermine | - |
| etamine | (noun) a soft cotton or worsted fabric with an open mesh; used for curtains or clothing etc. | Synonyms: etamin |
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| exocrine | (noun) a gland that secretes externally through a duct | Synonyms: duct gland, exocrine gland |
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| famine | (noun) a severe shortage of food (as through crop failure) resulting in violent hunger and starvation and death | - |
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| (noun) an acute insufficiency | Synonyms: dearth, shortage |
| famotidine | (noun) a histamine blocker (trade name Pepcid) used to treat peptic ulcers and gastritis and esophageal reflux | Synonyms: Pepcid |
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| fedelline | (noun) extremely fine pasta thinner than vermicelli | - |
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| feline | (noun) any of various lithe-bodied roundheaded fissiped mammals, many with retractile claws | Synonyms: felid |
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| feminine | (noun) a gender that refers chiefly (but not exclusively) to females or to objects classified as female | - |
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| fettuccine | (noun) pasta in flat strips wider than linguine | Synonyms: fettuccini |
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| figurine | (noun) a small carved or molded figure | Synonyms: statuette |
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| fine | (noun) money extracted as a penalty | Synonyms: amercement, mulct |
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| floxuridine | (noun) antineoplastic drug used to treat some cancers; can cause loss of hair | - |
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| fluoresceine | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluorescein, fluorescent dye, resorcinolphthalein |
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| fluorine | (noun) a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite | Synonyms: atomic number 9, F |
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| fluoxetine | (noun) a selective-serotonin reuptake inhibitor commonly prescribed as an antidepressant (trade names Prozac or Sarafem); it is thought to work by increasing the activity of serotonin in the brain | Synonyms: fluoxetine hydrocholoride, Prozac, Sarafem |
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| fluphenazine | (noun) tranquilizer used to treat psychotic disorders | - |
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| gabardine | (noun) a firm durable fabric with a twill weave | - |
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| (noun) a loose coverall (coat or frock) reaching down to the ankles | Synonyms: dust coat, duster, gaberdine, smock |
| (noun) (usually in the plural) trousers made of flannel or gabardine or tweed or white cloth | Synonyms: flannel, tweed, white |
| gaberdine | (noun) a loose coverall (coat or frock) reaching down to the ankles | Synonyms: dust coat, duster, gabardine, smock |
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| galantine | (noun) boned poultry stuffed then cooked and covered with aspic; served cold | - |
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| gallamine | (noun) neuromuscular blocking agent (trade name Flaxedil) used as a muscle relaxant in the administration of anesthesia | Synonyms: Flaxedil |
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| gamine | (noun) a girl of impish appeal | - |
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| (noun) a homeless girl who roams the streets | - |
| ganoine | (noun) shiny substance that resemble enamel and is secreted by the corium of certain fishes (especially ganoid fishes) and composes the outer layer of their scales | Synonyms: ganoin |
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| gasoline | (noun) a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines | Synonyms: gas, gasolene, petrol |
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| gelatine | (noun) a colorless water-soluble glutinous protein obtained from animal tissues such as bone and skin | Synonyms: gelatin |
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| glucosamine | (noun) an amino derivative of glucose that is a component of many polysaccharides | - |
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| glutamine | (noun) a crystalline amino acid occurring in proteins; important in protein metabolism | - |
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| glycerine | (noun) a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils | Synonyms: glycerin, glycerol |
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| glycine | (noun) the simplest amino acid found in proteins and the principal amino acid in sugar cane | - |
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| glyoxaline | (noun) an organic base C3H4N2; a histamine inhibitor | Synonyms: imidazole, iminazole |
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| goldmine | (noun) a mine where gold ore is found | Synonyms: gold mine |
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| (noun) a good source of something that is desired | Synonyms: gold mine |
| grapevine | (noun) gossip spread by spoken communication | Synonyms: pipeline, word of mouth |
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| (noun) any of numerous woody vines of genus Vitis bearing clusters of edible berries | Synonyms: grape, grape vine |
| gregarine | (noun) vermiform protozoans parasitic in insects and other invertebrates | - |
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| grenadine | (noun) thin syrup made from pomegranate juice; used in mixed drinks | - |
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| guanine | (noun) a purine base found in DNA and RNA; pairs with cytosine | Synonyms: G |
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| guanosine | (noun) a nucleoside component of DNA; composed of guanine and deoxyribose | Synonyms: deoxyguanosine |
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| guaranine | (noun) Guaranine is the name used to describe caffeine derived from the guarana plant. | - |
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| guideline | (noun) a rule or principle that provides guidance to appropriate behavior | Synonyms: guidepost, rule of thumb |
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| (noun) a detailed plan or explanation to guide you in setting standards or determining a course of action | Synonyms: road map |
| (noun) a light line that is used in lettering to help align the letters | - |
| guillotine | (noun) instrument of execution that consists of a weighted blade between two vertical poles; used for beheading people | - |
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| (noun) closure imposed on the debate of specific sections of a bill | Synonyms: closure by compartment |
| hairline | (noun) the natural margin formed by hair on the head | - |
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| (noun) a very thin line | - |
| handline | (noun) a fishing line managed principally by hand | Synonyms: hand line |
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| (noun) (climbing) a line that can be hung onto with hands while climbing up or down a steep or slick section for limited protection. | - |