| aeroembolism | (noun) obstruction of the circulatory system caused by an air bubble as, e.g., accidentally during surgery or hypodermic injection or as a complication from scuba diving | Synonyms: air embolism, gas embolism |
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| (noun) pain resulting from rapid change in pressure | Synonyms: air embolism, bends, caisson disease, decompression sickness, gas embolism |
| aloe | (noun) succulent plants having rosettes of leaves usually with fiber like hemp and spikes of showy flowers; found chiefly in Africa | - |
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| aloes | (noun) a purgative made from the leaves of aloe | Synonyms: bitter aloes |
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| alstroemeria | (noun) any of various South American plants of the genus Alstroemeria valued for their handsome umbels of beautiful flowers | - |
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| amenorrhoea | (noun) absence or suppression of normal menstrual flow | Synonyms: amenia, amenorrhea |
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| amoeba | (noun) naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion | Synonyms: ameba |
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| amoebiasis | (noun) infection by a disease-causing ameba | Synonyms: amebiasis, amebiosis, amoebiosis |
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| amoebiosis | (noun) infection by a disease-causing ameba | Synonyms: amebiasis, amebiosis, amoebiasis |
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| androecium | (noun) a male gametoecium | - |
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| angioedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: atrophedema, giant hives, periodic edema, Quincke's edema |
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| anoestrum | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrum, anestrus, anoestrus |
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| anoestrus | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrum, anestrus, anoestrum |
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| apoenzyme | (noun) a protein that combines with a coenzyme to form an active enzyme | - |
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| asafoetida | (noun) the brownish gum resin of various plants; has strong taste and odor; formerly used as an antispasmodic | Synonyms: asafetida |
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| autoeroticism | (noun) using your own body as a sexual object | Synonyms: autoerotism |
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| autoerotism | (noun) using your own body as a sexual object | Synonyms: autoeroticism |
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| backhoe | (noun) an excavator whose shovel bucket is attached to a hinged boom and is drawn backward to move earth | - |
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| beroe | (noun) delicately iridescent thimble-shaped ctenophores | - |
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| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| bioengineering | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: biotechnology, ergonomics |
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| bioethics | (noun) the branch of ethics that studies moral values in the biomedical sciences | - |
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| blastocoel | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoel, cleavage cavity, segmentation cavity |
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| boeuf | (noun) meat from an adult domestic bovine | Synonyms: beef |
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| cacoethes | (noun) an irrational but irresistible motive for a belief or action | Synonyms: mania, passion |
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| canoe | (noun) small and light boat; pointed at both ends; propelled with a paddle | - |
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| canoeist | (noun) someone paddling a canoe | Synonyms: paddler |
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| chapelgoer | (noun) a Protestant in England who is not a member of the Church of England | Synonyms: Nonconformist |
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| chigoe | (noun) small tropical flea; the fertile female burrows under the skin of the host including humans | Synonyms: chigger, chigoe flea, Tunga penetrans |
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| churchgoer | (noun) a religious person who goes to church regularly | Synonyms: church member |
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| coeducation | (noun) education of men and women in the same institutions | - |
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| coefficient | (noun) a constant number that serves as a measure of some property or characteristic | - |
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| coelacanth | (noun) fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa | Synonyms: Latimeria chalumnae |
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| coelenterate | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: cnidarian |
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| coelenteron | (noun) the saclike body cavity of a coelenterate | - |
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| coelogyne | (noun) any of various orchids of the genus Coelogyne with: clusters of fragrant lacy snow-white flowers; salmon-pink solitary flowers; chainlike racemes of topaz and chocolate brown flowers; spikes of delicate white spice-scented flowers; emerald green flowers marked with blue-black | - |
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| coelom | (noun) a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity | Synonyms: celom, celoma |
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| coelophysis | (noun) one of the oldest known dinosaurs; late Triassic; cannibalistic | - |
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| coelostat | (noun) optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror | - |
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| coenobite | (noun) a member of a religious order living in common | Synonyms: cenobite |
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| coenzyme | (noun) a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes | - |
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| coercion | (noun) using force to cause something to occur | Synonyms: compulsion |
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| (noun) the act of compelling by force of authority | - |
| coeval | (noun) a person of nearly the same age as another | Synonyms: contemporary |
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| coevals | (noun) all the people living at the same time or of approximately the same age | Synonyms: contemporaries, generation |
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| coexistence | (noun) existing peacefully together | - |
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| coextension | (noun) equality of extension or duration | - |
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| cohoe | (noun) small salmon of northern Pacific coasts and the Great Lakes | Synonyms: blue jack, coho, coho salmon, Oncorhynchus kisutch, silver salmon |
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| (noun) fatty pinkish flesh of small salmon caught in the Pacific and Great Lakes | Synonyms: coho, coho salmon, silver salmon |
| diarrhoea | (noun) frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor | Synonyms: diarrhea, looseness, looseness of the bowels |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| doe | (noun) mature female of mammals of which the male is called `buck' | - |
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| doer | (noun) a person who acts and gets things done | Synonyms: actor, worker |
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| doeskin | (noun) a fine smooth soft woolen fabric | - |
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| (noun) soft leather from deerskin or lambskin | - |
| dominoes | (noun) any of several games played with small rectangular blocks | Synonyms: dominos |
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| dyspnoea | (noun) difficult or labored respiration | Synonyms: dyspnea |
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| echoencephalogram | (noun) a graphical image of the brain produced by an echoencephalograph | - |
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| echoencephalograph | (noun) a sonograph that creates an image of the brain and its abnormalities | - |
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| echoencephalography | (noun) a noninvasive diagnostic procedure that uses ultrasound to study the anatomy of the brain | - |
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| electroencephalogram | (noun) a graphical record of electrical activity of the brain; produced by an electroencephalograph | Synonyms: EEG, encephalogram |
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| electroencephalograph | (noun) medical instrument that records electric currents generated by the brain | - |
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| eupnoea | (noun) normal relaxed breathing | Synonyms: eupnea |
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| evildoer | (noun) a person who sins (without repenting) | Synonyms: sinner |
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| felloe | (noun) rim (or part of the rim) into which spokes are inserted | Synonyms: felly |
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| floe | (noun) a flat mass of ice (smaller than an ice field) floating at sea | Synonyms: ice floe |
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| foe | (noun) a personal enemy | Synonyms: enemy |
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| (noun) an armed adversary (especially a member of an opposing military force) | Synonyms: enemy, foeman, opposition |
| foehn | (noun) a warm dry wind that blows down the northern slopes of the Alps | Synonyms: fohn |
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| foeman | (noun) an armed adversary (especially a member of an opposing military force) | Synonyms: enemy, foe, opposition |
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| foetology | (noun) the branch of medicine concerned with the fetus in the uterus | Synonyms: fetology |
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| foetometry | (noun) measurement of a fetus (especially the diameter of the head) | Synonyms: fetometry |
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| foetoprotein | (noun) any of several antigens that occur naturally in the fetus and sometimes in adults with cancer | Synonyms: fetoprotein |
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| foetor | (noun) a distinctive odor that is offensively unpleasant | Synonyms: fetor, malodor, malodour, mephitis, reek, stench, stink |
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| foetoscope | (noun) a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat | Synonyms: fetoscope |
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| foetoscopy | (noun) prenatal diagnosis that allows direct observation of a fetus in the uterus and the withdrawal of fetal blood | Synonyms: fetoscopy |
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| foetus | (noun) an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal | Synonyms: fetus |
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| framboesia | (noun) an infectious tropical disease resembling syphilis in its early stages; marked by red skin eruptions and ulcerating lesions | Synonyms: frambesia, yaws |
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| gametoecium | (noun) gametangia and surrounding bracts | - |
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| gastroenteritis | (noun) inflammation of the stomach and intestines; can be caused by Salmonella enteritidis | Synonyms: intestinal flu, stomach flu |
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| gastroenterologist | (noun) a physician who specializes in diseases of the gastrointestinal tract | - |
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| gastroenterology | (noun) the branch of medicine that studies the gastrointestinal tract and its diseases | - |
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| gastroenterostomy | (noun) surgical creation of an opening between the stomach wall and the small intestines; performed when the normal opening has been eliminated | - |
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| goer | (noun) someone who leaves | Synonyms: departer, leaver |
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| goethite | (noun) a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust | Synonyms: gothite |
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| gonorrhoea | (noun) a common venereal disease caused by the bacterium Neisseria gonorrhoeae; symptoms are painful urination and pain around the urethra | Synonyms: clap, gonorrhea |
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| groenendael | (noun) black-coated sheepdog with a heavily plumed tail | - |
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| gumshoe | (noun) a waterproof overshoe that protects shoes from water or snow | Synonyms: arctic, galosh, golosh, rubber |
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| (noun) someone who is a detective | Synonyms: dick, hawkshaw |
| gynoecium | (noun) a female gametoecium | - |
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| haematocoele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocele, hematocele, hematocoele |
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| hammertoe | (noun) a deformed toe which is bent in a clawlike arch | - |
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| hematocoele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocele, haematocoele, hematocele |
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| hoe | (noun) a tool with a flat blade attached at right angles to a long handle | - |
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| (noun) A sexually loose woman | Synonyms: ho, hussy, slut, trollop |
| hoecake | (noun) thin usually unleavened johnnycake made of cornmeal; originally baked on the blade of a hoe over an open fire (southern) | - |
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| homoeopath | (noun) a practitioner of homeopathy | Synonyms: homeopath |
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| homoeopathy | (noun) a method of treating disease with small amounts of remedies that, in large amounts in healthy people, produce symptoms similar to those being treated | Synonyms: homeopathy |
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| homoeroticism | (noun) a sexual attraction to (or sexual relations with) persons of the same sex | Synonyms: gayness, homosexualism, homosexuality, queerness |
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| hooey | (noun) senseless talk | Synonyms: poppycock, stuff, stuff and nonsense |
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| hoopoe | (noun) any of several crested Old World birds with a slender downward-curved bill | Synonyms: hoopoo |
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| horseshoe | (noun) U-shaped plate nailed to underside of horse's hoof | Synonyms: shoe |
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| (noun) game equipment consisting of an open ring of iron used in playing horseshoes | - |
| horseshoer | (noun) a person who shoes horses | Synonyms: farrier |
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| horseshoes | (noun) a game in which iron rings (or open iron rings) are thrown at a stake in the ground in the hope of encircling it | Synonyms: quoits |
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| hydroelectricity | (noun) electricity produced by water power | - |
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