| eighteenth | (noun) position 18 in a countable series of things | - |
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| eighth | (noun) one part in eight equal parts | Synonyms: one-eighth |
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| (noun) position eight in a countable series of things | - |
| eightieth | (noun) position 80 in a countable series of things | - |
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| electrotherapist | (noun) someone who specializes in the treatment of disease by electricity | - |
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| electrotherapy | (noun) the therapeutic application of electricity to the body (as in the treatment of various forms of paralysis) | Synonyms: electric healing, electrical healing, galvanism |
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| eleventh | (noun) position 11 in a countable series of things | - |
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| empathy | (noun) understanding and entering into another's feelings | - |
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| enanthem | (noun) eruption on a mucous membrane (as the inside of the mouth) occurring as a symptom of a disease | Synonyms: enanthema |
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| enanthema | (noun) eruption on a mucous membrane (as the inside of the mouth) occurring as a symptom of a disease | Synonyms: enanthem |
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| enarthrosis | (noun) a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone | Synonyms: articulatio spheroidea, ball-and-socket joint, cotyloid joint, enarthrodial joint, spheroid joint |
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| encephalopathy | (noun) any disorder or disease of the brain | Synonyms: brain disease, brain disorder |
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| endothelium | (noun) an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities | - |
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| enterolith | (noun) a calculus occurring in the intestines | - |
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| enterolithiasis | (noun) the presence of calculi in the intestines | - |
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| enteropathy | (noun) a disease of the intestinal tract | - |
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| enthalpy | (noun) (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure | Synonyms: H, heat content, total heat |
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| enthrallment | (noun) a feeling of great liking for something wonderful and unusual | Synonyms: captivation, enchantment, fascination |
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| enthronement | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronisation, enthronization, investiture |
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| enthronisation | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronement, enthronization, investiture |
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| enthronization | (noun) the ceremony of installing a new monarch | Synonyms: coronation, enthronement, enthronisation, investiture |
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| enthusiasm | (noun) overflowing with eager enjoyment or approval | Synonyms: ebullience, exuberance |
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| (noun) a lively interest | - |
| (noun) a feeling of excitement | - |
| enthusiast | (noun) an ardent and enthusiastic supporter of some person or activity | Synonyms: partisan, partizan |
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| (noun) a person having a strong liking for something | Synonyms: fancier |
| eolith | (noun) a crude stone artifact (as a chipped flint); possibly the earliest tools | - |
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| epanorthosis | (noun) immediate rephrasing for intensification or justification | - |
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| epenthesis | (noun) the insertion of a vowel or consonant into a word to make its pronunciation easier | - |
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| epicanthus | (noun) a vertical fold of skin over the nasal canthus; typical for many east Asian peoples; sometimes occurs in Down's syndrome | Synonyms: epicanthic fold |
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| epilith | (noun) A plant, fungus, or other organism that grows upon rock. | - |
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| epimythium | (noun) a moral at the end of a story. | - |
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| epithalamium | (noun) an ode honoring a bride and bridegroom | - |
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| epithelioma | (noun) a malignant tumor of the epithelial tissue | - |
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| epithelium | (noun) membranous tissue covering internal organs and other internal surfaces of the body | Synonyms: epithelial tissue |
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| epithet | (noun) descriptive word or phrase | - |
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| (noun) a defamatory or abusive word or phrase | Synonyms: name |
| erethism | (noun) an abnormally high degree of irritability or sensitivity to stimulation of an organ or body part | - |
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| erythema | (noun) abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation) | - |
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| erythrina | (noun) any of various shrubs or shrubby trees of the genus Erythrina having trifoliate leaves and racemes of scarlet to coral red flowers and black seeds; cultivated as an ornamental | Synonyms: coral tree |
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| erythrite | (noun) a reddish mineral consisting of hydrated cobalt arsenate in monoclinic crystalline form and used in coloring glass; usually found in veins bearing cobalt and arsenic | Synonyms: cobalt bloom |
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| erythroblast | (noun) a nucleated cell in bone marrow from which red blood cells develop | - |
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| erythroblastosis | (noun) a blood disease characterized by the abnormal presence of erythroblasts in the blood | - |
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| erythrocyte | (noun) a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus | Synonyms: RBC, red blood cell |
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| erythrocytolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrolysin, haemolysin, hemolysin |
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| erythroderma | (noun) any skin disorder involving abnormal redness | - |
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| erythrolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrocytolysin, haemolysin, hemolysin |
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| erythromycin | (noun) an antibiotic (trade name Erythrocin or E-Mycin or Ethril or Ilosone or Pediamycin) obtained from the actinomycete Streptomyces erythreus; effective against many Gram-positive bacteria and some Gram-negative | Synonyms: E-Mycin, Erythrocin, Ethril, Ilosone, Pediamycin |
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| erythropoiesis | (noun) the process of producing red blood cells by the stem cells in the bone marrow | - |
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| erythropoietin | (noun) a glycoprotein secreted by the kidneys that stimulates the production of red blood cells | - |
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| esthesia | (noun) mental responsiveness and awareness | Synonyms: aesthesia, sensibility |
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| esthesiology | (noun) the scientific study or description of the sense organs and sensations. | - |
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| esthesis | (noun) an unelaborated elementary awareness of stimulation | Synonyms: aesthesis, sensation, sense datum, sense experience, sense impression |
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| esthete | (noun) one who professes great sensitivity to the beauty of art and nature | Synonyms: aesthete |
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| esthetic | (noun) (philosophy) a philosophical theory as to what is beautiful | Synonyms: aesthetic |
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| esthetician | (noun) a philosopher who specializes in the nature of beauty | Synonyms: aesthetician |
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| (noun) a worker skilled in giving beauty treatments (manicures and facials etc.) | Synonyms: aesthetician |
| esthetics | (noun) (art) the branch of philosophy dealing with beauty and taste (emphasizing the evaluative criteria that are applied to art) | Synonyms: aesthetics |
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| ethanal | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: acetaldehyde |
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| ethanamide | (noun) a colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds | Synonyms: acetamide |
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| ethane | (noun) a colorless odorless alkane gas used as fuel | Synonyms: C2H6 |
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| ethanediol | (noun) a sweet but poisonous syrupy liquid used as an antifreeze and solvent | Synonyms: ethylene glycol, glycol |
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| ethanoate | (noun) a salt or ester of acetic acid | Synonyms: acetate |
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| ethanol | (noun) the intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent or in medicines and colognes and cleaning solutions and rocket fuel; proposed as a renewable clean-burning additive to gasoline | Synonyms: ethyl alcohol, fermentation alcohol, grain alcohol |
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| ethchlorvynol | (noun) a mild sedative-hypnotic drug (trade name Placidyl) | Synonyms: Placidyl |
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| ethene | (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic | Synonyms: ethylene |
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| ether | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ethoxyethane, ethyl ether, vinyl ether |
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| (noun) a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves | Synonyms: aether |
| (noun) any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom | - |
| (noun) the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies | Synonyms: quintessence |
| ethernet | (noun) a type of network technology for local area networks; coaxial cable carries radio frequency signals between computers at a rate of 10 megabits per second | - |
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| ethic | (noun) the principles of right and wrong that are accepted by an individual or a social group | Synonyms: moral principle, value-system, value orientation |
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| (noun) a system of principles governing morality and acceptable conduct | Synonyms: ethical code |
| ethicality | (noun) The state, quality or manner of conforming to accepted standards of conduct. | - |
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| ethician | (noun) a philosopher who specializes in ethics | Synonyms: ethicist |
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| ethicism | (noun) a doctrine that ethics and ethical ideas are valid and important | - |
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| ethicist | (noun) a philosopher who specializes in ethics | Synonyms: ethician |
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| ethics | (noun) the philosophical study of moral values and rules | Synonyms: moral philosophy |
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| (noun) motivation based on ideas of right and wrong | Synonyms: ethical motive, morality, morals |
| ethmoid | (noun) one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity | Synonyms: ethmoid bone |
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| ethnarch | (noun) the ruler of a province (as in the Roman Empire and Byzantine Empire) or certain religious rulers with secular authority | - |
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| ethnic | (noun) a person who is a member of an ethnic group | - |
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| ethnicity | (noun) an ethnic quality or affiliation resulting from racial or cultural ties | - |
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| ethnocentrism | (noun) belief in the superiority of one's own ethnic group | - |
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| ethnographer | (noun) an anthropologist who does ethnography | - |
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| ethnography | (noun) the branch of anthropology that provides scientific description of individual human societies | Synonyms: descriptive anthropology |
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| ethnologist | (noun) an anthropologist who studies ethnology | - |
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| ethnology | (noun) the branch of anthropology that deals with the division of humankind into races and with their origins and distribution and distinctive characteristics | - |
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| ethnos | (noun) people of the same race or nationality who share a distinctive culture | Synonyms: ethnic group |
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| ethologist | (noun) a zoologist who studies the behavior of animals in their natural habitats | - |
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| ethology | (noun) the branch of zoology that studies the behavior of animals in their natural habitats | - |
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| ethos | (noun) (anthropology) the distinctive spirit of a culture or an era | - |
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| ethosuximide | (noun) an anticonvulsant drug (trade names Emeside and Zarontin) used to treat petit mal epilepsy | Synonyms: Emeside, Zarontin |
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| ethoxyethane | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ether, ethyl ether, vinyl ether |
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| ethyl | (noun) the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom | Synonyms: ethyl group, ethyl radical |
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| ethylene | (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic | Synonyms: ethene |
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| ethyne | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: acetylene, alkyne |
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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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| 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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| 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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| euthanasia | (noun) the act of killing someone painlessly (especially someone suffering from an incurable illness) | Synonyms: mercy killing |
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| euthenics | (noun) the study of methods of improving human well-being and efficient functioning by improving environmental conditions | - |
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| eutherian | (noun) mammals having a placenta; all mammals except monotremes and marsupials | Synonyms: eutherian mammal, placental, placental mammal |
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| everything | (noun) all things that are of importance to a person | - |
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| exanthem | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthema, skin eruption |
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| exanthema | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthem, skin eruption |
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| exophthalmos | (noun) protrusion of the eyeball from the socket | - |
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| exotherm | (noun) a compound that gives off heat during its formation and absorbs heat during its decomposition | - |
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| eyebath | (noun) a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball | Synonyms: eye cup, eyecup |
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