| adoxography | (noun) fine writing in praise of trivial or base subjects | - |
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| aflatoxin | (noun) a potent carcinogen from the fungus Aspergillus; can be produced and stored for use as a bioweapon | - |
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| amoxicillin | (noun) an antibiotic; a semisynthetic oral penicillin (trade names Amoxil and Larotid and Polymox and Trimox and Augmentin) used to treat bacterial infections | Synonyms: Amoxil, Augmentin, Larotid, Polymox, Trimox |
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| amphioxus | (noun) small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates | Synonyms: lancelet |
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| anatoxin | (noun) a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin | Synonyms: toxoid |
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| anoxemia | (noun) abnormally low oxygen content in arterial blood | - |
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| anoxemic | (adjective) relating to or marked by abnormally little oxygen in arterial blood | - |
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| anoxia | (noun) severe hypoxia; absence of oxygen in inspired gases or in arterial blood or in the tissues | - |
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| anoxic | (adjective) relating to or marked by a severe deficiency of oxygen in tissues or organs | - |
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| antioxidant | (noun) substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides | - |
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| antitoxic | (adjective) counteracting a toxin or poison | - |
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| antitoxin | (noun) an antibody that can neutralize a specific toxin | - |
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| approximate | (adjective) located close together | Synonyms: close together |
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| (adjective) very close in resemblance | Synonyms: near |
| (adjective) not quite exact or correct | Synonyms: approximative, rough |
| (verb) judge tentatively or form an estimate of (quantities or time) | Synonyms: estimate, gauge, guess, judge |
| (verb) be close or similar | Synonyms: come close |
| approximately | (adverb) (of quantities) imprecise but fairly close to correct | Synonyms: about, around, close to, just about, more or less, or so, roughly, some |
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| approximation | (noun) the act of bringing near or bringing together especially the cut edges of tissue | Synonyms: bringing close together |
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| (noun) the quality of coming near to identity (especially close in quantity) | - |
| (noun) an approximate calculation of quantity or degree or worth | Synonyms: estimate, estimation, idea |
| (noun) an imprecise or incomplete account | - |
| approximative | (adjective) not quite exact or correct | Synonyms: approximate, rough |
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| atoxic | (adjective) not producing or resulting from poison | Synonyms: nontoxic |
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| bandbox | (noun) a light cylindrical box for holding light articles of attire (especially hats) | - |
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| bobbysoxer | (noun) an adolescent girl wearing bobby socks (common in the 1940s) | Synonyms: bobby-socker |
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| botulismotoxin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulin, botulinus toxin |
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| box | (noun) a blow with the hand (usually on the ear) | - |
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| (noun) a (usually rectangular) container; may have a lid | - |
| (noun) separate partitioned area in a public place for a few people | - |
| (noun) private area in a theater or grandstand where a small group can watch the performance | Synonyms: loge |
| (noun) the driver's seat on a coach | Synonyms: box seat |
| (noun) any one of several designated areas on a ball field where the batter or catcher or coaches are positioned | - |
| (noun) evergreen shrubs or small trees | Synonyms: boxwood |
| (noun) the quantity contained in a box | Synonyms: boxful |
| (noun) a rectangular drawing | - |
| (noun) a predicament from which a skillful or graceful escape is impossible | Synonyms: corner |
| (verb) hit with the fist | - |
| (verb) engage in a boxing match | - |
| (verb) put into a box | Synonyms: package |
| boxberry | (noun) spicy red berrylike fruit; source of wintergreen oil | Synonyms: checkerberry, spiceberry, teaberry, wintergreen |
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| (noun) creeping woody plant of eastern North America with shiny evergreen leaves and scarlet berries | Synonyms: Mitchella repens, partridgeberry, twinberry |
| boxcar | (noun) a freight car with roof and sliding doors in the sides | - |
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| boxcars | (noun) (usually plural) an expression used when two dice are thrown and both come up showing six spots | - |
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| boxed | (adjective) enclosed in or set off by a border or box | - |
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| (adjective) enclosed in or as if in a box | Synonyms: boxed-in, boxed in |
| boxer | (noun) a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany | - |
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| (noun) someone who fights with his fists for sport | Synonyms: pugilist |
| (noun) a workman employed to pack things into containers | Synonyms: bagger, packer |
| boxers | (noun) underpants worn by men | Synonyms: boxershorts, drawers, shorts, underdrawers |
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| boxershorts | (noun) underpants worn by men | Synonyms: boxers, drawers, shorts, underdrawers |
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| boxfish | (noun) any of numerous small tropical fishes having body and head encased in bony plates | Synonyms: trunkfish |
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| boxful | (noun) the quantity contained in a box | Synonyms: box |
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| boxing | (noun) fighting with the fists | Synonyms: fisticuffs, pugilism |
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| (noun) the enclosure of something in a package or box | Synonyms: packing |
| boxlike | (adjective) resembling a box in rectangularity | Synonyms: box-shaped, boxy |
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| boxthorn | (noun) any of various shrubs or vines of the genus Lycium with showy flowers and bright berries | Synonyms: matrimony vine |
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| boxwood | (noun) evergreen shrubs or small trees | Synonyms: box |
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| (noun) very hard tough close-grained light yellow wood of the box (particularly the common box); used in delicate woodwork: musical instruments and inlays and engraving blocks | Synonyms: Turkish boxwood |
| boxy | (adjective) resembling a box in rectangularity | Synonyms: box-shaped, boxlike |
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| breadbox | (noun) a container used to keep bread or cake in | Synonyms: bread-bin |
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| camelpox | (noun) a viral disease of camels closely related to smallpox | - |
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| carboxyl | (adjective) relating to or containing the carboxyl group or carboxyl radical | Synonyms: carboxylic |
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| (noun) the univalent radical -COOH; present in and characteristic of organic acids | Synonyms: carboxyl group |
| carboxylate | (verb) treat (a chemical compound) with carboxyl or carboxylic acid | - |
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| carboxylic | (adjective) relating to or containing the carboxyl group or carboxyl radical | Synonyms: carboxyl |
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| cashbox | (noun) a strongbox for holding cash | Synonyms: money box, till |
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| cefadroxil | (noun) a cephalosporin antibiotic (trade name Ultracef) | Synonyms: Ultracef |
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| cefuroxime | (noun) a cephalosporin that can be given parenterally (trade name Zinacef) or orally by tablets (trade name Ceftin); indicated for infections of the lungs or throat or ears or urinary tract or meninges | Synonyms: Ceftin, Zinacef |
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| celecoxib | (noun) a Cox-2 inhibitor (trade name Celebrex) that relieves pain and inflammation without harming the digestive tract | Synonyms: Celebrex |
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| chatterbox | (noun) an obnoxious and foolish and loquacious talker | Synonyms: babbler, chatterer, magpie, prater, spouter |
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| (noun) orchid growing along streams or ponds of western North America having leafy stems and 1 greenish-brown and pinkish flower in the axil of each upper leaf | Synonyms: Epipactis gigantea, giant helleborine, stream orchid |
| chickenpox | (noun) an acute contagious disease caused by herpes varicella zoster virus; causes a rash of vesicles on the face and body | Synonyms: varicella |
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| chlordiazepoxide | (noun) a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism | Synonyms: Libritabs, Librium |
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| ciprofloxacin | (noun) an oral antibiotic (trade name Cipro) used against serious bacterial infections of the skin or respiratory tract or urinary tract or bones or joints | Synonyms: Cipro |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| colpoxerosis | (noun) a condition in which the vagina is unusually dry | - |
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| cowpox | (noun) a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox | Synonyms: vaccinia |
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| cox | (noun) the helmsman of a ship's boat or a racing crew | Synonyms: coxswain |
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| (verb) act as the coxswain, in a boat race | - |
| coxa | (noun) the ball-and-socket joint between the head of the femur and the acetabulum | Synonyms: articulatio coxae, hip, hip joint |
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| coxcomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: cockscomb, comb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: cockscomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: cockscomb |
| coxsackievirus | (noun) enterovirus causing a disease resembling poliomyelitis but without paralysis | Synonyms: Coxsackie virus |
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| coxswain | (noun) the helmsman of a ship's boat or a racing crew | Synonyms: cox |
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| cyclooxygenase | (noun) either of two related enzymes that control the production of prostaglandins and are blocked by aspirin | Synonyms: Cox |
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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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| decarboxylase | (noun) any of the enzymes that hydrolize the carboxyl group | - |
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| decarboxylate | (verb) lose a carboxyl group | - |
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| (verb) remove a carboxyl group from (a chemical compound) | - |
| decarboxylation | (noun) the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen) | - |
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| deedbox | (noun) a strongly made box for holding money or valuables; can be locked | Synonyms: strongbox |
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| deoxidise | (verb) to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons | Synonyms: deoxidize, reduce |
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| deoxidize | (verb) to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons | Synonyms: deoxidise, reduce |
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| 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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| deoxygenate | (verb) remove oxygen from (water) | - |
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| deoxyguanosine | (noun) a nucleoside component of DNA; composed of guanine and deoxyribose | Synonyms: guanosine |
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| deoxynucleotide | (noun) Any nucleotide that contains a deoxy sugar. | - |
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| deoxyribose | (noun) a sugar that is a constituent of nucleic acids | - |
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| deoxythymidine | (noun) a nucleoside component of DNA; composed of thymine and deoxyribose | Synonyms: thymidine |
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| detox | (noun) the hospital ward or clinic in which patients are detoxified | - |
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| (verb) treat for alcohol or drug dependence | Synonyms: detoxify |
| detoxicate | (verb) remove poison from | Synonyms: detoxify |
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| detoxification | (noun) treatment for poisoning by neutralizing the toxic properties (normally a function of the liver) | - |
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| (noun) a treatment for addiction to drugs or alcohol intended to remove the physiological effects of the addictive substances | - |
| detoxify | (verb) treat for alcohol or drug dependence | Synonyms: detox |
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| (verb) remove poison from | Synonyms: detoxicate |
| diazoxide | (noun) vasodilator (trade name Hyperstat) used to treat severe hypertension | Synonyms: Hyperstat |
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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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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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| digitoxin | (noun) digitalis preparation used to treat congestive heart failure or cardiac arrhythmia | - |
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| digoxin | (noun) digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully | Synonyms: Lanoxin |
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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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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| dioxide | (noun) an oxide containing two atoms of oxygen in the molecule | - |
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| dioxin | (noun) any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides | - |
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| doxazosin | (noun) an antihypertensive drug (trade name Cardura) that works by relaxing blood vessels so that blood passes through them more easily; it is also used to treat benign prostatic hyperplasia | Synonyms: Cardura |
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| doxepin | (noun) a tricyclic antidepressant (trade names Adapin and Sinequan) with numerous side effects (dry mouth and sedation and gastrointestinal disturbances) | Synonyms: Adapin, doxepin hydrochloride, Sinequan |
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| doxing | (noun) Releasing someone's personal information on the Web with the intention of causing harassment | - |
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| doxology | (noun) a hymn or verse in Christian liturgy glorifying God | - |
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| doxorubicin | (noun) an antibiotic used as an anticancer drug | - |
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| doxy | (noun) a woman who cohabits with an important man | Synonyms: concubine, courtesan, paramour |
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| doxycycline | (noun) an antibiotic derived from tetracycline that is effective against many infections | Synonyms: Vibramycin |
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| endotoxin | (noun) a toxin that is confined inside the microorganisms and is released only when the microorganisms are broken down or die | - |
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| enterotoxemia | (noun) a disease of cattle and sheep that is attributed to toxins absorbed from the intestines | - |
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| enterotoxin | (noun) a cytotoxin specific for the cells of the intestinal mucosa | - |
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| epoxy | (noun) a thermosetting resin; used chiefly in strong adhesives and coatings and laminates | Synonyms: epoxy glue, epoxy resin |
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| (verb) glue with epoxy | - |