| celandine | (noun) perennial herb with branched woody stock and bright yellow flowers | Synonyms: Chelidonium majus, greater celandine, swallow wort, swallowwort |
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| (noun) North American annual plant with usually yellow or orange flowers; grows chiefly on wet rather acid soil | Synonyms: Impatiens capensis, jewelweed, lady's earrings, orange balsam, touch-me-not |
| centerline | (noun) a line that bisects a plane figure | Synonyms: center line |
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| cephaloridine | (noun) a broad spectrum semisynthetic antibiotic produced by modifying cephalosporin | - |
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| cervine | (adjective) relating to or resembling deer | - |
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| chatelaine | (noun) a chain formerly worn at the waist by women; for carrying a purse or bunch of keys etc. | - |
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| (noun) the mistress of a chateau or large country house | - |
| chine | (noun) backbone of an animal | - |
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| (noun) cut of meat or fish including at least part of the backbone | - |
| (verb) cut through the backbone of an animal | - |
| chloramine | (noun) any of several compounds containing chlorine and nitrogen; used as an antiseptic in wounds | Synonyms: chloramine-T |
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| chlorhexidine | (noun) a long-lasting liquid antiseptic; used by surgeons to wash their hands before performing surgery | - |
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| chlorine | (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) | Synonyms: atomic number 17, Cl |
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| chloroquine | (noun) an antimalarial drug used to treat malaria and amebic dysentery and systemic lupus erythematosus | - |
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| chlorpromazine | (noun) a drug (trade name Thorazine) derived from phenothiazine that has antipsychotic effects and is used as a sedative and tranquilizer | Synonyms: Thorazine |
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| chlortetracycline | (noun) a yellow crystalline antibiotic (trade name Aureomycin) used to treat certain bacterial and rickettsial diseases | Synonyms: Aureomycin |
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| choline | (noun) a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat | - |
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| chopine | (noun) a woman's shoe with a very high thick sole | Synonyms: platform |
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| chorine | (noun) a woman who dances in a chorus line | Synonyms: chorus girl, showgirl |
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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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| cinchonine | (noun) an alkaloid derivative of the bark of cinchona trees that is used as an antimalarial drug | - |
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| cisalpine | (adjective) on the Italian or Roman side of the Alps | Synonyms: ultramontane |
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| citrine | (noun) semiprecious yellow quartz resembling topaz | - |
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| citrulline | (noun) an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine | - |
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| clandestine | (adjective) conducted with or marked by hidden aims or methods | Synonyms: cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground |
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| clementine | (noun) a mandarin orange of a deep reddish orange color and few seeds | - |
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| (noun) a variety of mandarin orange that is grown around the Mediterranean and in South Africa | Synonyms: clementine tree |
| clomipramine | (noun) a tricyclic antidepressant drug | - |
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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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| clothesline | (noun) a cord on which clothes are hung to dry | - |
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| clozapine | (noun) an antipsychotic drug (trade name Clozaril) used as a sedative and for treatment-resistant schizophrenia; known to have few side effects | Synonyms: Clozaril |
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| coastline | (noun) the outline of a coast | - |
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| 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 |
| (verb) mix together different elements | Synonyms: blend, coalesce, commingle, conflate, flux, fuse, immix, meld, merge, mix |
| (verb) put or add together | Synonyms: compound |
| (verb) combine so as to form a whole; mix | Synonyms: compound |
| (verb) gather in a mass, sum, or whole | Synonyms: aggregate |
| (verb) add together from different sources | - |
| (verb) join for a common purpose or in a common action | - |
| (verb) have or possess in combination | Synonyms: unite |
| 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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| confine | (verb) place limits on (extent or amount or access) | Synonyms: bound, limit, restrict, throttle, trammel |
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| (verb) to close within bounds, or otherwise limit or deprive of free movement | Synonyms: constrain, hold, restrain |
| (verb) prevent from leaving or from being removed | - |
| (verb) deprive of freedom; take into confinement | Synonyms: detain |
| (verb) close in | Synonyms: enclose, hold in |
| consanguine | (adjective) related by blood | Synonyms: akin, blood-related, cognate, consanguineal, consanguineous, kin |
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| copaline | (noun) partly mineralized copal dug from the ground | Synonyms: copalite, fossil copal |
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| corvine | (adjective) relating to or resembling a crow | - |
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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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| (verb) destroy enemy mines with one's own mines | - |
| (verb) destroy property or hinder normal operations | Synonyms: counteract, sabotage, subvert, undermine, weaken |
| 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 |
| crystalline | (adjective) consisting of or containing or of the nature of crystals | - |
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| (adjective) transmitting light; able to be seen through with clarity | Synonyms: crystal clear, limpid, lucid, pellucid, transparent |
| (adjective) distinctly or sharply outlined | - |
| 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 |
| (verb) mark with a date and place | Synonyms: date-mark, datemark |
| 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 |
| (verb) grow smaller | Synonyms: go down, wane |
| (verb) grow worse | Synonyms: worsen |
| (verb) show unwillingness towards | Synonyms: refuse |
| (verb) inflect for number, gender, case, etc. | - |
| (verb) go down | - |
| (verb) fall in value | Synonyms: correct, slump |
| (verb) not accept as true | Synonyms: pass up, refuse, reject, turn down |
| define | (verb) give a definition for the meaning of a word | - |
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| (verb) decide upon or fix definitely | Synonyms: determine, fix, limit, set, specify |
| (verb) determine the essential quality of | Synonyms: delimit, delimitate, delineate, specify |
| (verb) determine the nature of | - |
| (verb) show the form or outline of | Synonyms: delineate |
| 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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| destine | (verb) design or destine | Synonyms: designate, intend, specify |
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| (verb) decree or designate beforehand | Synonyms: designate, doom, fate |
| determine | (verb) reach, make, or come to a decision about something | Synonyms: decide, make up one's mind |
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| (verb) fix conclusively or authoritatively | Synonyms: set |
| (verb) shape or influence; give direction to | Synonyms: influence, mold, mould, regulate, shape |
| (verb) fix in scope; fix the boundaries of | - |
| (verb) establish after a calculation, investigation, experiment, survey, or study | Synonyms: ascertain, find, find out |
| (verb) find out, learn, or determine with certainty, usually by making an inquiry or other effort | Synonyms: ascertain, check, find out, learn, see, watch |
| (verb) decide upon or fix definitely | Synonyms: define, fix, limit, set, specify |
| (verb) settle conclusively; come to terms | Synonyms: settle, square off, square up |
| 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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| diamantine | (adjective) consisting of diamonds or resembling diamonds | - |
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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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| dine | (verb) have supper; eat dinner | - |
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| (verb) give dinner to; host for dinner | - |
| 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 | - |
| (verb) punish in order to gain control or enforce obedience | Synonyms: correct, sort out |
| (verb) develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control | Synonyms: check, condition, train |
| disincline | (verb) make unwilling | Synonyms: indispose |
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| divine | (adjective) being of such surpassing excellence as to suggest inspiration by the gods | Synonyms: elysian, inspired |
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| (adjective) emanating from God | Synonyms: godly |
| (adjective) devoted to or in the service or worship of a deity | - |
| (adjective) appropriate to or befitting a god | Synonyms: godlike |
| (adjective) being or having the nature of a god | Synonyms: godlike |
| (adjective) resulting from divine providence | Synonyms: providential |
| (noun) a clergyman or other person in religious orders | Synonyms: churchman, cleric, ecclesiastic |
| (verb) search by divining, as if with a rod | - |
| (verb) perceive intuitively or through some inexplicable perceptive powers | - |
| 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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| eccrine | (adjective) (of exocrine glands) producing a clear aqueous secretion without releasing part of the secreting cell; important in regulating body temperature | - |
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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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| elephantine | (adjective) of great mass; huge and bulky | Synonyms: gargantuan, giant, jumbo |
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| enamine | (noun) an amine containing the double bond linkage -C=C-N- | - |
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| endocrine | (adjective) of or belonging to endocrine glands or their secretions | Synonyms: endocrinal |
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| (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 |
| (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 | - |
| enshrine | (verb) enclose in a shrine | Synonyms: shrine |
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| (verb) hold sacred | Synonyms: saint |
| entwine | (verb) spin, wind, or twist together | Synonyms: enlace, interlace, intertwine, lace, twine |
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| (verb) tie or link together | Synonyms: knit |
| 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 | (adjective) resembling a horse | - |
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| (adjective) of or belonging to the family Equidae | - |
| (noun) hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck | Synonyms: equid |
| 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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