| ephemeral | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeron |
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| ephemerality | (noun) the property of lasting for a very short time | Synonyms: ephemeralness, fleetingness |
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| ephemeralness | (noun) the property of lasting for a very short time | Synonyms: ephemerality, fleetingness |
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| ephemerid | (noun) short-lived insect | Synonyms: ephemeropteran |
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| ephemeris | (noun) an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year | - |
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| ephemeron | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeral |
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| ephemeropteran | (noun) short-lived insect | Synonyms: ephemerid |
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| epigraph | (noun) an engraved inscription | - |
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| (noun) a quotation at the beginning of some piece of writing | - |
| epigraphy | (noun) the study of ancient inscriptions | - |
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| epikeratophakia | (noun) using a piece of donated corneal tissue to repair the eye of someone who has had a cataract removed | - |
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| epinephrin | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, adrenaline, epinephrine |
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| epinephrine | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, adrenaline, epinephrin |
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| epiphany | (noun) a divine manifestation | - |
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| epiphenomenon | (noun) a secondary phenomenon that is a by-product of another phenomenon | - |
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| epiphonema | (noun) a sentence that is an exclamation, a general or striking comment, or a succinct summary of what has previously been said. | - |
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| epiphora | (noun) repetition of the ends of two or more successive sentences, verses, etc. | Synonyms: epistrophe |
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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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| epiphysis | (noun) the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused | - |
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| (noun) a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin | Synonyms: epiphysis cerebri, pineal body, pineal gland |
| epiphyte | (noun) plant that derives moisture and nutrients from the air and rain; usually grows on another plant but not parasitic on it | Synonyms: aerophyte, air plant, epiphytic plant |
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| epistrophe | (noun) repetition of the ends of two or more successive sentences, verses, etc. | Synonyms: epiphora |
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| epitaph | (noun) an inscription on a tombstone or monument in memory of the person buried there | - |
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| (noun) a summary statement of commemoration for a dead person | - |
| esophagitis | (noun) inflammation of the esophagus; often caused by gastroesophageal reflux | Synonyms: oesophagitis |
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| esophagoscope | (noun) an optical instrument for examining the inside of the esophagus | Synonyms: oesophagoscope |
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| esophagus | (noun) the passage between the pharynx and the stomach | Synonyms: gorge, gullet, oesophagus |
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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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| euglenophyte | (noun) marine and freshwater green or colorless flagellate organism | Synonyms: euglenid, euglenoid |
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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 | - |
| europhilia | (noun) admiration for Europe, Europeans, or the European Union. | - |
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| eutrophication | (noun) excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life | - |
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| exomphalos | (noun) an umbilical hernia at birth in which some abdominal organs push into the umbilical cord | - |
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| exophthalmos | (noun) protrusion of the eyeball from the socket | - |
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| exosphere | (noun) the outermost atmospheric layer | - |
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| flophouse | (noun) a cheap lodging house | Synonyms: dosshouse |
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| fluphenazine | (noun) tranquilizer used to treat psychotic disorders | - |
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| gametophore | (noun) a modified branch bearing gametangia as in the thalloid liverworts | - |
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| gametophyte | (noun) the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations | - |
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| geographer | (noun) an expert on geography | - |
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| geographics | (noun) study of the earth's surface; includes people's responses to topography and climate and soil and vegetation | Synonyms: geography |
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| geography | (noun) study of the earth's surface; includes people's responses to topography and climate and soil and vegetation | Synonyms: geographics |
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| geomorphology | (noun) the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms | Synonyms: morphology |
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| geophagia | (noun) eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior | Synonyms: geophagy |
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| geophagy | (noun) eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior | Synonyms: geophagia |
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| geophysicist | (noun) a geologist who uses physical principles to study the properties of the earth | - |
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| geophysics | (noun) geology that uses physical principles to study properties of the earth | Synonyms: geophysical science |
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| geophyte | (noun) a perennial plant that propagates by underground bulbs or tubers or corms | - |
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| geosphere | (noun) the solid part of the earth consisting of the crust and outer mantle | Synonyms: lithosphere |
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| glomerulonephritis | (noun) nephritis marked by inflammation of the glomeruli of the kidney; characterized by decreased production of urine and by the presence of blood and protein in the urine and by edema | - |
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| glyph | (noun) glyptic art in the form of a symbolic figure carved or incised in relief | - |
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| glyptography | (noun) carving or engraving (especially on stones) | - |
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| (noun) carvings or engravings (especially on precious stones) | Synonyms: glyptic art |
| gomphothere | (noun) extinct elephants of Central American and South America; of the Miocene and Pleistocene | - |
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| gonadotrophin | (noun) hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity | Synonyms: gonadotrophic hormone, gonadotropic hormone, gonadotropin |
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| gopher | (noun) burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America | Synonyms: pocket gopher, pouched rat |
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| (noun) burrowing edible land tortoise of southeastern North America | Synonyms: gopher tortoise, gopher turtle, Gopherus polypemus |
| (noun) any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops | Synonyms: ground squirrel, spermophile |
| (noun) a zealously energetic person (especially a salesman) | Synonyms: goffer |
| gopherwood | (noun) small handsome roundheaded deciduous tree having showy white flowers in terminal clusters and heavy hardwood yielding yellow dye | Synonyms: Cladrastis kentukea, Cladrastis lutea, Kentucky yellowwood |
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| gramophone | (noun) an antique record player; the sound of the vibrating needle is amplified acoustically | Synonyms: acoustic gramophone |
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| grandnephew | (noun) a son of your niece or nephew | Synonyms: great-nephew |
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| graph | (noun) a visual representation of the relations between certain quantities, represented as points, plotted with reference to a set of axes | Synonyms: graphical record, graphical recording |
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| (noun) a visual display of information | Synonyms: chart |
| (noun) a written symbol that is used to represent speech | Synonyms: character, grapheme, graphic symbol |
| grapheme | (noun) a written symbol that is used to represent speech | Synonyms: character, graph, graphic symbol |
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| graphic | (noun) an image that is generated by a computer | Synonyms: computer graphic |
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| graphics | (noun) the drawings and photographs in the layout of a book | - |
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| (noun) photographs or other visual representations in a printed publication | Synonyms: art, artwork, nontextual matter |
| graphite | (noun) used as a lubricant and as a moderator in nuclear reactors | Synonyms: black lead, plumbago |
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| graphologist | (noun) a specialist in inferring character from handwriting | Synonyms: handwriting expert |
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| graphology | (noun) the study of handwriting (especially as an indicator of the writer's character or disposition) | - |
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| graphospasm | (noun) muscular spasms of thumb and forefinger while writing with a pen or pencil | Synonyms: writer's cramp |
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| gryphon | (noun) winged monster with the head of an eagle and the body of a lion | Synonyms: griffin, griffon |
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| gymnosophist | (noun) member of a Hindu sect practicing gymnosophy (especially nudism) | - |
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| gymnosophy | (noun) the doctrine of a sect of Hindu philosophers who practiced nudity and asceticism and meditation | - |
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| gynandromorph | (noun) one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made | Synonyms: androgyne, epicene, epicene person, hermaphrodite, intersex |
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| gynophobia | (noun) a morbid fear of women | - |
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| gynophore | (noun) the stalk of a pistil that raises it above the receptacle | - |
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| haemophile | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: bleeder, haemophiliac, hemophile, hemophiliac |
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| haemophilia | (noun) congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son | Synonyms: bleeder's disease, hemophilia |
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| haemophiliac | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: bleeder, haemophile, hemophile, hemophiliac |
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| hagiographer | (noun) the author of a worshipful or idealizing biography | Synonyms: hagiographist, hagiologist |
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| hagiographist | (noun) the author of a worshipful or idealizing biography | Synonyms: hagiographer, hagiologist |
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| hagiography | (noun) a biography that idealizes or idolizes the person (especially a person who is a saint) | - |
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| halophil | (noun) archaebacteria requiring a salt-rich environment for growth and survival | Synonyms: halophile |
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| halophile | (noun) archaebacteria requiring a salt-rich environment for growth and survival | Synonyms: halophil |
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| halophyte | (noun) plant growing naturally in very salty soil | - |
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| haphazardness | (noun) the quality of lacking any predictable order or plan | Synonyms: noise, randomness, stochasticity |
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| headphone | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, earpiece, phone |
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| hebephrenia | (noun) a form of schizophrenia characterized by severe disintegration of personality including erratic speech and childish mannerisms and bizarre behavior; usually becomes evident during puberty; the most common diagnostic category in mental institutions | Synonyms: disorganized schizophrenia, disorganized type schizophrenia, hebephrenic schizophrenia |
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| heckelphone | (noun) an oboe pitched an octave below the ordinary oboe | Synonyms: basset oboe |
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| hectograph | (noun) duplicator consisting of a gelatin plate from which ink can be taken to make a copy | Synonyms: heliotype |
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| heliograph | (noun) an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on | - |
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| heliophila | (noun) any of various South African herbs and subshrubs cultivated for long showy racemes of bright blue flowers with white eyes | - |
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| heliosphere | (noun) the region inside the heliopause containing the sun and solar system | - |
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| hemiepiphyte | (noun) a plant that is an epiphyte for part of its life | Synonyms: semiepiphyte |
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| hemimetamorphosis | (noun) incomplete or partial metamorphosis in insects | Synonyms: hemimetabolism, hemimetaboly |
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| hemimorphite | (noun) a white mineral; a common ore of zinc | Synonyms: calamine |
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| hemisphere | (noun) either half of the cerebrum | Synonyms: cerebral hemisphere |
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| (noun) half of the terrestrial globe | - |
| (noun) half of a sphere | - |
| hemophile | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: bleeder, haemophile, haemophiliac, hemophiliac |
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| hemophilia | (noun) congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son | Synonyms: bleeder's disease, haemophilia |
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