| accoucheur | (noun) a physician specializing in obstetrics | Synonyms: obstetrician |
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| accoucheuse | (noun) a woman skilled in aiding the delivery of babies | Synonyms: midwife |
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| aculeus | (noun) a sharp-pointed process especially a sting of a hymenopterous insect | - |
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| (noun) a stiff sharp-pointed plant process | - |
| adieu | (noun) a farewell remark | Synonyms: adios, arrivederci, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| aleurone | (noun) granular protein in outermost layer of endosperm of many seeds or cereal grains | - |
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| amateur | (noun) someone who pursues a study or sport as a pastime | - |
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| (noun) an athlete who does not play for pay | - |
| amateurishness | (noun) something that demonstrates a lack of professional competency | - |
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| amateurism | (noun) the conviction that people should participate in sports as a hobby (for the fun of it) rather than for money | - |
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| aneuploidy | (noun) an abnormality involving a chromosome number that is not an exact multiple of the haploid number (one chromosome set is incomplete) | - |
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| aneurin | (noun) a B vitamin that prevents beriberi; maintains appetite and growth | Synonyms: antiberiberi factor, thiamin, thiamine, vitamin B1 |
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| aneurism | (noun) a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall | Synonyms: aneurysm |
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| aneurysm | (noun) a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall | Synonyms: aneurism |
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| antineutrino | (noun) the antiparticle of a neutrino | - |
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| antineutron | (noun) the antiparticle of a neutron | - |
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| aponeurosis | (noun) any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons | - |
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| arbitrageur | (noun) someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential) | Synonyms: arb, arbitrager |
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| architeuthis | (noun) largest mollusk known about but never seen (to 60 feet long) | Synonyms: giant squid |
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| athenaeum | (noun) a place where reading materials are available | Synonyms: atheneum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: atheneum |
| atheneum | (noun) a place where reading materials are available | Synonyms: athenaeum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: athenaeum |
| auteur | (noun) a filmmaker who has a personal style and keeps creative control over his or her works | - |
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| basileus | (noun) a ruler of the eastern Roman Empire | - |
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| berceuse | (noun) a quiet song intended to lull a child to sleep | Synonyms: cradlesong, lullaby |
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| bleu | (noun) cheese containing a blue mold | Synonyms: blue cheese |
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| boeuf | (noun) meat from an adult domestic bovine | Synonyms: beef |
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| bonheur | (noun) (French) happiness and good humor | - |
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| bronchopneumonia | (noun) pneumonia characterized by acute inflammation of the walls of the bronchioles | Synonyms: bronchial pneumonia |
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| caduceus | (noun) an insignia used by the medical profession; modeled after the staff of Hermes | - |
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| calcaneus | (noun) the largest tarsal bone; forms the human heel | Synonyms: heelbone, os tarsi fibulare |
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| calceus | (noun) a shoe covering the ankle; worn by ancient Romans | - |
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| carillonneur | (noun) a musician who plays a carillon | - |
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| chartreuse | (noun) a shade of green tinged with yellow | Synonyms: Paris green, pea green, yellow green, yellowish green |
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| chauffeur | (noun) a person paid to drive a privately owned car | - |
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| chauffeuse | (noun) a woman chauffeur | - |
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| closeup | (noun) a photograph taken at close range | - |
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| clypeus | (noun) a shield-like plate on the front of an insect's head | - |
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| coiffeur | (noun) a man hairdresser | - |
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| coiffeuse | (noun) a woman hairdresser | - |
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| coleus | (noun) any of various Old World tropical plants of the genus Coleus having multicolored decorative leaves and spikes of blue flowers | Synonyms: flame nettle |
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| coliseum | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheater, amphitheatre |
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| comeupance | (noun) an outcome (good or bad) that is well deserved and fitting | Synonyms: comeuppance, just deserts, poetic justice |
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| comeuppance | (noun) an outcome (good or bad) that is well deserved and fitting | Synonyms: comeupance, just deserts, poetic justice |
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| connoisseur | (noun) an expert able to appreciate a field; especially in the fine arts | Synonyms: cognoscente |
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| connoisseurship | (noun) love of or taste for fine objects of art | Synonyms: vertu, virtu |
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| corneum | (noun) the outermost layer of the epidermis consisting of dead cells that slough off | Synonyms: horny layer, stratum corneum |
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| cuneus | (noun) any shape that is triangular in cross section | Synonyms: wedge, wedge shape |
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| danseur | (noun) a male ballet dancer who is the partner of a ballerina | Synonyms: danseur noble |
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| danseuse | (noun) a female ballet dancer | Synonyms: ballerina |
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| dejeuner | (noun) a midday meal | Synonyms: lunch, luncheon, tiffin |
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| deuce | (noun) one of the four playing cards in a deck that have two spots | Synonyms: two |
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| (noun) a word used in exclamations of confusion | Synonyms: devil, dickens |
| (noun) the cardinal number that is the sum of one and one or a numeral representing this number | Synonyms: 2, II, two |
| (noun) a tie in tennis or table tennis that requires winning two successive points to win the game | - |
| deuteranopia | (noun) dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red | Synonyms: Daltonism, green-blindness |
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| deuterium | (noun) an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen) | Synonyms: heavy hydrogen |
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| deuteron | (noun) the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators | - |
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| deutzia | (noun) any of various shrubs of the genus Deutzia having usually toothed opposite leaves and shredding bark and white or pink flowers in loose terminal clusters | - |
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| effleurage | (noun) a rhythmic stroking | - |
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| endoneurium | (noun) delicate connective tissue around individual nerve fibers in nerve | - |
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| endosteum | (noun) vascular membrane that lines the inner surface of long bones | - |
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| entrepreneur | (noun) someone who organizes a business venture and assumes the risk for it | Synonyms: enterpriser |
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| eubacteria | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacterium, true bacteria |
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| eubacterium | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacteria, true bacteria |
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| eucalypt | (noun) a tree of the genus Eucalyptus | Synonyms: eucalyptus, eucalyptus tree |
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| eucalyptus | (noun) a tree of the genus Eucalyptus | Synonyms: eucalypt, eucalyptus tree |
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| (noun) wood of any of various eucalyptus trees valued as timber | - |
| eucaryote | (noun) an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells | Synonyms: eukaryote |
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| euchre | (noun) a card game similar to ecarte; each player is dealt 5 cards and the player making trump must take 3 tricks to win a hand | Synonyms: five hundred |
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| eudaemon | (noun) a benevolent spirit | Synonyms: eudemon, good spirit |
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| eudaemonia | (noun) a contented state of being happy and healthy and prosperous | Synonyms: eudaimonia, upbeat, welfare, well-being, wellbeing |
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| eudaimonia | (noun) a contented state of being happy and healthy and prosperous | Synonyms: eudaemonia, upbeat, welfare, well-being, wellbeing |
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| eudemon | (noun) a benevolent spirit | Synonyms: eudaemon, good spirit |
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| eudemonism | (noun) an ethical system that evaluates actions by reference to personal well-being through a life based on reason | Synonyms: endaemonism |
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| eudiometer | (noun) measuring instrument consisting of a graduated glass tube for measuring volume changes in chemical reactions between gases | - |
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| eugenics | (noun) the study of methods of improving genetic qualities by selective breeding (especially as applied to human mating) | - |
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| euglena | (noun) minute single-celled green freshwater organism having a single flagella; often classed as algae | - |
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| euglenid | (noun) marine and freshwater green or colorless flagellate organism | Synonyms: euglenoid, euglenophyte |
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| euglenoid | (noun) marine and freshwater green or colorless flagellate organism | Synonyms: euglenid, euglenophyte |
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| euglenophyte | (noun) marine and freshwater green or colorless flagellate organism | Synonyms: euglenid, euglenoid |
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| eukaryote | (noun) an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells | Synonyms: eucaryote |
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| eulogist | (noun) an orator who delivers eulogies or panegyrics | Synonyms: panegyrist |
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| eulogium | (noun) a formal expression of praise for someone who has died recently | Synonyms: eulogy |
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| eulogy | (noun) a formal expression of praise for someone who has died recently | Synonyms: eulogium |
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| (noun) a formal expression of praise | Synonyms: encomium, paean, panegyric, pean |
| eunuch | (noun) a man who has been castrated and is incapable of reproduction | Synonyms: castrate |
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| eunuchoidism | (noun) the state of being a eunuch (either because of lacking testicles or because they failed to develop) | Synonyms: male hypogonadism |
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| euphemism | (noun) an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh | - |
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| euphonium | (noun) a bass horn (brass wind instrument) that is the tenor of the tuba family | - |
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| euphony | (noun) any agreeable (pleasing and harmonious) sounds | Synonyms: music |
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| euphorbium | (noun) an acrid brown gum resin now used mainly in veterinary medicine | Synonyms: gum eurphorbium |
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| euphoria | (noun) a feeling of great (usually exaggerated) elation | Synonyms: euphory |
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| euphoriant | (noun) a psychoactive drug that tends to produce elation and euphoria | - |
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| euphory | (noun) a feeling of great (usually exaggerated) elation | Synonyms: euphoria |
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| euphuism | (noun) an elegant style of prose of the Elizabethan period; characterized by balance and antithesis and alliteration and extended similes with and allusions to nature and mythology | - |
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| (noun) any artificially elegant style of language | - |
| eupnea | (noun) normal relaxed breathing | Synonyms: eupnoea |
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| eupnoea | (noun) normal relaxed breathing | Synonyms: eupnea |
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| eurhythmics | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmy, eurythmics, eurythmy |
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| eurhythmy | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmics, eurythmics, eurythmy |
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| euro | (noun) the basic monetary unit of most members of the European Union (introduced in 1999); in 2002 twelve European nations (Germany, France, Belgium, Luxembourg, the Netherlands, Italy, Spain, Portugal, Ireland, Greece, Austria, Finland) adopted the euro as their basic unit of money and abandoned their traditional currencies | - |
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| euronithopod | (noun) widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon) | Synonyms: Euronithopoda, Ornithopoda, suborder Euronithopoda, suborder Ornithopoda |
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| europhilia | (noun) admiration for Europe, Europeans, or the European Union. | - |
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| europium | (noun) a bivalent and trivalent metallic element of the rare earth group | Synonyms: atomic number 63, Eu |
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| eurypterid | (noun) large extinct scorpion-like arthropod considered related to horseshoe crabs | - |
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| eurythmics | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmics, eurhythmy, eurythmy |
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| eurythmy | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmics, eurhythmy, eurythmics |
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| eusporangium | (noun) a sporangium that arises from a group of epidermal cells | - |
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