| endemism | (noun) nativeness by virtue of originating or occurring naturally (as in a particular place) | Synonyms: autochthony, indigenousness |
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| endocardium | (noun) the membrane that lines the cavities of the heart and forms part of the heart valves | - |
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| endocranium | (noun) membrane lining the inside of the skull | - |
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| endoderm | (noun) the inner germ layer that develops into the lining of the digestive and respiratory systems | Synonyms: endoblast, entoblast, entoderm, hypoblast |
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| endometrium | (noun) (pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition | - |
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| endoneurium | (noun) delicate connective tissue around individual nerve fibers in nerve | - |
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| endoplasm | (noun) the inner portion of the cytoplasm of a cell | - |
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| endosperm | (noun) nutritive tissue surrounding the embryo within seeds of flowering plants | - |
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| endosteum | (noun) vascular membrane that lines the inner surface of long bones | - |
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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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| energetism | (noun) the philosophical theory that energy is the substrate of all phenomena and that all observable changes can be interpreted as transformations of one kind of energy into another. | Synonyms: energetic monism |
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| engram | (noun) a postulated biochemical change (presumably in neural tissue) that represents a memory | Synonyms: memory trace |
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| ensiform | (adjective) shaped like a sword blade | Synonyms: bladelike, sword-shaped, swordlike |
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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 | - |
| entoderm | (noun) the inner germ layer that develops into the lining of the digestive and respiratory systems | Synonyms: endoblast, endoderm, entoblast, hypoblast |
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| envenom | (verb) add poison to | Synonyms: poison |
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| (verb) cause to be bitter or resentful | Synonyms: acerbate, embitter |
| environmentalism | (noun) the activity of protecting the environment from pollution or destruction | - |
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| (noun) the philosophical doctrine that environment is more important than heredity in determining intellectual growth | - |
| epicardium | (noun) the innermost of the two layers of the pericardium | Synonyms: visceral pericardium |
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| epicranium | (noun) the muscle and aponeurosis and skin covering the cranium | - |
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| epicureanism | (noun) a doctrine of hedonism that was defended by several ancient Greek philosophers | - |
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| epicurism | (noun) the disposition and habits of an epicure | - |
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| epigastrium | (noun) the region lying on or over the stomach (just below the sternum) | - |
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| epigram | (noun) a witty saying | Synonyms: quip |
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| epimythium | (noun) a moral at the end of a story. | - |
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| epiphyllum | (noun) any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers | Synonyms: orchid cactus |
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| episperm | (noun) protective outer layer of seeds of flowering plants | Synonyms: seed coat, testa |
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| epithalamium | (noun) an ode honoring a bride and bridegroom | - |
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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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| eponym | (noun) the name derived from a person (real or imaginary) | - |
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| (noun) the person for whom something is named | - |
| equalitarianism | (noun) the doctrine of the equality of mankind and the desirability of political and economic and social equality | Synonyms: egalitarianism |
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| equilibrium | (noun) a sensory system located in structures of the inner ear that registers the orientation of the head | Synonyms: labyrinthine sense, sense of balance, sense of equilibrium, vestibular sense |
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| (noun) a chemical reaction and its reverse proceed at equal rates | Synonyms: chemical equilibrium |
| (noun) equality of distribution | Synonyms: balance, counterbalance, equipoise |
| (noun) a stable situation in which forces cancel one another | - |
| erbium | (noun) a trivalent metallic element of the rare earth group; occurs with yttrium | Synonyms: atomic number 68, Er |
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| eremitism | (noun) monasticism characterized by solitude in which the social dimension of life is sacrificed to the primacy of religious experience | - |
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| erethism | (noun) an abnormally high degree of irritability or sensitivity to stimulation of an organ or body part | - |
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| ergotism | (noun) poisoning by ingestion of ergot-infected grain products; characterized by thirst and diarrhea and nausea and cramping and vomiting and abnormal cardiac rhythms; in severe cases it can cause seizures and gangrene of the limbs | - |
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| ergotropism | (noun) an affinity for work | - |
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| eriogonum | (noun) any plant of the genus Eriogonum with small clustered flowers | - |
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| eroticism | (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, amorousness, erotism, sexiness |
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| (noun) a state of anticipation of sexuality | Synonyms: erotism |
| erotism | (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, amorousness, eroticism, sexiness |
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| (noun) a state of anticipation of sexuality | Synonyms: eroticism |
| erratum | (noun) a mistake in printed matter resulting from mechanical failures of some kind | Synonyms: literal, literal error, misprint, typo, typographical error |
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| escapism | (noun) an inclination to retreat from unpleasant realities through diversion or fantasy | Synonyms: escape |
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| establishmentarianism | (noun) the doctrine of supporting the social or political establishment | Synonyms: establishmentism |
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| establishmentism | (noun) the doctrine of supporting the social or political establishment | Synonyms: establishmentarianism |
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| estazolam | (noun) a frequently prescribed sleeping pill (trade name ProSom) | Synonyms: ProSom |
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| esteem | (noun) an attitude of admiration or esteem | Synonyms: regard, respect |
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| (noun) a feeling of delighted approval and liking | Synonyms: admiration |
| (noun) the condition of being honored (esteemed or respected or well regarded) | Synonyms: regard, respect |
| (verb) look on as or consider | Synonyms: be known as, know as, look on, look upon, regard as, repute, take to be, think of |
| (verb) regard highly; think much of | Synonyms: prise, prize, respect, value |
| ethicism | (noun) a doctrine that ethics and ethical ideas are valid and important | - |
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| ethnocentrism | (noun) belief in the superiority of one's own ethnic group | - |
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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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| 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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| eulogium | (noun) a formal expression of praise for someone who has died recently | Synonyms: eulogy |
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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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| euphorbium | (noun) an acrid brown gum resin now used mainly in veterinary medicine | Synonyms: gum eurphorbium |
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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 | - |
| europium | (noun) a bivalent and trivalent metallic element of the rare earth group | Synonyms: atomic number 63, Eu |
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| eusporangium | (noun) a sporangium that arises from a group of epidermal cells | - |
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| evangelicalism | (noun) stresses the importance of personal conversion and faith as the means of salvation | - |
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| evangelism | (noun) zealous preaching and advocacy of the gospel | - |
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| evolutionism | (noun) (biology) a scientific theory of the origin of species of plants and animals | Synonyms: theory of evolution, theory of organic evolution |
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| exam | (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: examination, test |
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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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| exclaim | (verb) utter aloud; often with surprise, horror, or joy | Synonyms: call out, cry, cry out, outcry, shout |
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| (verb) state or announce | Synonyms: proclaim, promulgate |
| exhibitionism | (noun) the perverse act of exposing and attracting attention to your own genitals | Synonyms: immodesty |
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| (noun) extravagant and conspicuous behavior intended to attract attention to yourself | - |
| existentialism | (noun) (philosophy) a 20th-century philosophical movement chiefly in Europe; assumes that people are entirely free and thus responsible for what they make of themselves | Synonyms: existential philosophy, existentialist philosophy |
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| exoderm | (noun) the outer germ layer that develops into skin and nervous tissue | Synonyms: ectoblast, ectoderm |
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| exorcism | (noun) freeing from evil spirits | Synonyms: dispossession |
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| exordium | (noun) (rhetoric) the introductory section of an oration or discourse | - |
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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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| exoticism | (noun) the quality of being exotic | Synonyms: exoticness, exotism |
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| exotism | (noun) the quality of being exotic | Synonyms: exoticism, exoticness |
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| expansionism | (noun) the doctrine of expanding the territory or the economic influence of a country | - |
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| experimentalism | (noun) an orientation that favors experimentation and innovation | - |
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| (noun) an empirical doctrine that advocates experimental principles | - |
| explanandum | (noun) (logic) a statement of something (a fact or thing or expression) to be explained | Synonyms: explicandum |
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| explicandum | (noun) (logic) a statement of something (a fact or thing or expression) to be explained | Synonyms: explanandum |
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| expressionism | (noun) an art movement early in the 20th century; the artist's subjective expression of inner experiences was emphasized; an inner feeling was expressed through a distorted rendition of reality | - |
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| extremism | (noun) any political theory favoring immoderate uncompromising policies | - |
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| extremum | (noun) the point located farthest from the middle of something | Synonyms: extreme, extreme point |
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| (noun) the most extreme possible amount or value | Synonyms: peak |
| facepalm | (noun) the act of putting your hand to cover your face to show disappointment or despair | - |
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| factotum | (noun) a servant employed to do a variety of jobs | - |
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| falciform | (adjective) curved like a sickle | Synonyms: falcate, sickle-shaped |
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| fanaticism | (noun) excessive intolerance of opposing views | Synonyms: fanatism, zealotry |
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| fanatism | (noun) excessive intolerance of opposing views | Synonyms: fanaticism, zealotry |
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| fancam | (noun) footage of a celebrity taken by a fan | - |
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| fandom | (noun) the fans of a sport or famous person | - |
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| fantasm | (noun) something existing in perception only | Synonyms: apparition, phantasm, phantasma, phantom, shadow |
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| (noun) a ghostly appearing figure | Synonyms: apparition, phantasm, phantasma, phantom, specter, spectre |
| farm | (noun) workplace consisting of farm buildings and cultivated land as a unit | - |
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| (verb) cultivate by growing, often involving improvements by means of agricultural techniques | Synonyms: grow, produce, raise |
| (verb) collect fees or profits | - |
| (verb) be a farmer; work as a farmer | - |
| fascism | (noun) a political theory advocating an authoritarian hierarchical government (as opposed to democracy or liberalism) | - |
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| fatalism | (noun) a philosophical doctrine holding that all events are predetermined in advance for all time and human beings are powerless to change them | - |
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| (noun) a submissive mental attitude resulting from acceptance of the doctrine that everything that happens is predetermined and inevitable | - |
| fathom | (noun) a linear unit of measurement (equal to 6 feet) for water depth | Synonyms: fthm |
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| (noun) (mining) a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore | Synonyms: fthm |
| (verb) measure the depth of (a body of water) with a sounding line | Synonyms: sound |
| (verb) come to understand | Synonyms: bottom, penetrate |
| fatism | (noun) discrimination against people who are overweight | Synonyms: fattism |
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| fattism | (noun) discrimination against people who are overweight | Synonyms: fatism |
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| fauvism | (noun) an art movement launched in 1905 whose work was characterized by bright and nonnatural colors and simple forms; influenced the expressionists | - |
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| favism | (noun) anemia resulting from eating fava beans; victims have an inherited blood abnormality and enzyme deficiency | - |
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| favoritism | (noun) unfair treatment of a person or group on the basis of prejudice | Synonyms: discrimination, favouritism |
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| (noun) an inclination to favor some person or group | Synonyms: favouritism |
| favouritism | (noun) unfair treatment of a person or group on the basis of prejudice | Synonyms: discrimination, favoritism |
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| (noun) an inclination to favor some person or group | Synonyms: favoritism |
| federalism | (noun) the idea of a federal organization of more or less self-governing units | - |
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| feminism | (noun) the movement aimed at equal rights for women | Synonyms: feminist movement, women's lib, women's liberation movement |
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| (noun) a doctrine that advocates equal rights for women | - |
| fermium | (noun) a radioactive transuranic metallic element produced by bombarding plutonium with neutrons | Synonyms: atomic number 100, Fm |
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| ferrimagnetism | (noun) a phenomenon in ferrites where there can be incomplete cancellation of antiferromagnetic arranged spins giving a net magnetic moment | - |
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