| dominatrix | (noun) a dominating woman (especially one who plays that role in a sadomasochistic sexual relationship) | - |
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| dosimetry | (noun) measuring the dose of radiation emitted by a radioactive source | - |
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| dotrel | (noun) rare plover of upland areas of Eurasia | Synonyms: Charadrius morinellus, dotterel, Eudromias morinellus |
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| doubletree | (noun) a crossbar on a wagon or carriage to which two whiffletrees are attached in order to harness two horses abreast | - |
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| downstroke | (noun) a stroke normally made in a downward direction | - |
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| drawstring | (noun) a tie consisting of a cord that goes through a seam around an opening | Synonyms: drawing string, string |
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| dustrag | (noun) a piece of cloth used for dusting | Synonyms: dustcloth, duster |
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| dystrophy | (noun) any degenerative disorder resulting from inadequate or faulty nutrition | - |
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| (noun) any of several hereditary diseases of the muscular system characterized by weakness and wasting of skeletal muscles | Synonyms: muscular dystrophy |
| eccentric | (noun) a person with an unusual or odd personality | Synonyms: eccentric person, flake, geek, oddball |
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| (noun) a person of a specified kind (usually with many eccentricities) | Synonyms: case, character, type |
| eccentricity | (noun) strange and unconventional behavior | - |
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| (noun) a circularity that has a different center or deviates from a circular path | - |
| (noun) (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis | - |
| econometrician | (noun) an economist who uses statistical and mathematical methods | Synonyms: econometrist |
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| econometrics | (noun) the application of mathematics and statistics to the study of economic and financial data | - |
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| econometrist | (noun) an economist who uses statistical and mathematical methods | Synonyms: econometrician |
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| ectrodactyly | (noun) congenital abnormality involving the absence of some fingers or toes | - |
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| egocentric | (noun) a self-centered person with little regard for others | Synonyms: egoist |
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| egocentrism | (noun) concern for your own interests and welfare | Synonyms: egoism, self-centeredness, self-concern, self-interest |
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| electric | (noun) a car that is powered by electricity | Synonyms: electric automobile, electric car |
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| electrician | (noun) a person who installs or repairs electrical or telephone lines | Synonyms: lineman, linesman |
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| electricity | (noun) keen and shared excitement | - |
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| (noun) a physical phenomenon associated with stationary or moving electrons and protons | - |
| (noun) energy made available by the flow of electric charge through a conductor | Synonyms: electrical energy, power |
| electrification | (noun) the activity of thrilling or markedly exciting some person or group | - |
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| (noun) the act of providing electricity | - |
| electrocardiogram | (noun) a graphical recording of the cardiac cycle produced by an electrocardiograph | Synonyms: cardiogram, ECG, EKG |
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| electrocardiograph | (noun) medical instrument that records electric currents associated with contractions of the heart | Synonyms: cardiograph |
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| electrocardiography | (noun) diagnostic procedure consisting of recording the activity of the heart electronically with a cardiograph (and producing a cardiogram) | Synonyms: cardiography |
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| electrocautery | (noun) application of a needle heated by an electric current to destroy tissue (as to remove warts) | - |
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| electrochemistry | (noun) branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions | - |
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| electrocution | (noun) killing by electric shock | - |
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| (noun) execution by electricity | Synonyms: burning |
| electrocutioner | (noun) an executioner who uses electricity to kill the condemned person | - |
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| electrode | (noun) a conductor used to make electrical contact with some part of a circuit | - |
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| electrodeposition | (noun) the deposition of a substance on an electrode by the action of electricity (especially by electrolysis) | - |
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| electrodynamometer | (noun) measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power | - |
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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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| electrograph | (noun) electrical device used for etching by electrolytic means | - |
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| (noun) an apparatus for the electrical transmission of pictures | - |
| electrolocation | (noun) The use of electroreception to locate surrounding objects. | - |
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| electrologist | (noun) someone skilled in the use of electricity to remove moles or warts or hair roots | - |
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| electrolysis | (noun) removing superfluous or unwanted hair by passing an electric current through the hair root | - |
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| (noun) (chemistry) a chemical decomposition reaction produced by passing an electric current through a solution containing ions | - |
| electrolyte | (noun) a solution that conducts electricity | - |
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| electrolytic | (noun) a fixed capacitor consisting of two electrodes separated by an electrolyte | Synonyms: electrolytic capacitor, electrolytic condenser |
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| electromagnet | (noun) a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet | - |
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| electromagnetics | (noun) the branch of physics concerned with electromagnetic phenomena | Synonyms: electromagnetism |
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| electromagnetism | (noun) the branch of physics concerned with electromagnetic phenomena | Synonyms: electromagnetics |
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| (noun) magnetism produced by an electric current | - |
| electrometer | (noun) meter to measure electrostatic voltage differences; draws no current from the source | - |
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| electromyogram | (noun) a graphical record of electric currents associated with muscle contractions | Synonyms: EMG |
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| electromyograph | (noun) a medical instrument that records the electrical waves associated with the activity of skeletal muscles | - |
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| electromyography | (noun) diagnosis of neuromuscular disorders with the use of an electromyograph | - |
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| electron | (noun) an elementary particle with negative charge | Synonyms: negatron |
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| electronegativity | (noun) (chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond | Synonyms: negativity |
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| electronics | (noun) the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices | - |
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| electrophoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: cataphoresis, dielectrolysis, ionophoresis |
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| electrophorus | (noun) a simple electrostatic generator that generates repeated charges of static electricity | - |
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| electroplate | (noun) any artifact that has been plated with a thin coat of metal by electrolysis | - |
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| electroplater | (noun) a plater who uses electrolysis | - |
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| electroretinogram | (noun) a graphical recording of the electrical activity of the retina that results when light is flashed into the eye | - |
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| electroscope | (noun) measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign | - |
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| electroshock | (noun) the administration of a strong electric current that passes through the brain to induce convulsions and coma | Synonyms: ECT, electroconvulsive therapy, electroshock therapy |
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| electrosleep | (noun) unconsciousness brought about by the passage of a low voltage electric current through the brain | - |
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| electrostatics | (noun) the branch of physics that deals with static electricity | - |
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| electrosurgery | (noun) surgery performed with electrical devices (as in electrocautery) | - |
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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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| electrum | (noun) an alloy of gold and silver | - |
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| elytron | (noun) either of the horny front wings in beetles and some other insects which cover and protect the functional hind wings | Synonyms: wing case |
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| emmetropia | (noun) (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina | - |
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| enchantress | (noun) a female sorcerer or magician | Synonyms: witch |
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| (noun) a woman who is considered to be dangerously seductive | Synonyms: Delilah, femme fatale, siren, temptress |
| endometriosis | (noun) the presence of endometrium elsewhere than in the lining of the uterus; causes premenstrual pain and dysmenorrhea | Synonyms: adenomyosis |
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| endometritis | (noun) inflammation of the lining of the uterus (of the endometrium) | Synonyms: metritis |
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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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| entrails | (noun) internal organs collectively (especially those in the abdominal cavity) | Synonyms: innards, insides, viscera |
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| entrance | (noun) the act of entering | Synonyms: entering, entry, incoming, ingress |
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| (noun) something that provides access (to get in or get out) | Synonyms: entranceway, entree, entry, entryway |
| (noun) a movement into or inward | Synonyms: entering |
| entrancement | (noun) a feeling of delight at being filled with wonder and enchantment | Synonyms: ravishment |
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| entranceway | (noun) something that provides access (to get in or get out) | Synonyms: entrance, entree, entry, entryway |
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| entrant | (noun) a commodity that enters competition with established merchandise | - |
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| (noun) one who enters a competition | - |
| (noun) any new participant in some activity | Synonyms: fledgeling, fledgling, freshman, neophyte, newbie, newcomer, starter |
| (noun) someone who enters | - |
| entrapment | (noun) a defense that claims the defendant would not have broken the law if not tricked into doing it by law enforcement officials | - |
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| entreaty | (noun) earnest or urgent request | Synonyms: appeal, prayer |
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| entrecote | (noun) cut of meat taken from between the ribs | - |
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| entree | (noun) an entrance, especially a theatrical entrance onto a stage or as if onto a stage | - |
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| (noun) something that provides access (to get in or get out) | Synonyms: entrance, entranceway, entry, entryway |
| (noun) the right to enter | Synonyms: access, accession, admission, admittance |
| (noun) the principal dish of a meal | Synonyms: main course |
| entremets | (noun) a dish that is served with, but is subordinate to, a main course | Synonyms: side dish, side order |
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| entrenchment | (noun) an entrenched fortification; a position protected by trenches | Synonyms: intrenchment |
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| entrepot | (noun) a depository for goods | Synonyms: depot, storage, store, storehouse |
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| (noun) a port where merchandise can be imported and then exported without paying import duties | Synonyms: transshipment center |
| entrepreneur | (noun) someone who organizes a business venture and assumes the risk for it | Synonyms: enterpriser |
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| entresol | (noun) intermediate floor just above the ground floor | Synonyms: mezzanine, mezzanine floor |
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| entric | (noun) rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals | Synonyms: enteric bacteria, enterics, enterobacteria |
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| entropy | (noun) (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work | Synonyms: randomness, S |
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| (noun) (communication theory) a numerical measure of the uncertainty of an outcome | Synonyms: information, selective information |
| entry | (noun) the act of entering | Synonyms: entering, entrance, incoming, ingress |
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| (noun) the act of beginning something new | Synonyms: debut, first appearance, introduction, launching, unveiling |
| (noun) something that provides access (to get in or get out) | Synonyms: entrance, entranceway, entree, entryway |
| (noun) something (manuscripts or architectural plans and models or estimates or works of art of all genres etc.) submitted for the judgment of others (as in a competition) | Synonyms: submission |
| (noun) an item inserted in a written record | - |
| (noun) a written record of a commercial transaction | Synonyms: accounting entry, ledger entry |
| entryphone | (noun) An intercom system which enables someone, without opening the door, to converse with the person who has rung the doorbell. | - |
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| entryway | (noun) something that provides access (to get in or get out) | Synonyms: entrance, entranceway, entree, entry |
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| epicentre | (noun) the point on the Earth's surface directly above the focus of an earthquake | Synonyms: epicenter |
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| epigastrium | (noun) the region lying on or over the stomach (just below the sternum) | - |
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| epistrophe | (noun) repetition of the ends of two or more successive sentences, verses, etc. | Synonyms: epiphora |
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| eptatretus | (noun) a fossil hagfish of the genus Eptatretus | - |
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| equestrian | (noun) a person skilled in equitation | Synonyms: horseback rider |
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| equidistribution | (noun) a flat distribution having equal frequencies of occurrence | - |
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| ergotropism | (noun) an affinity for work | - |
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| esotropia | (noun) strabismus in which one or both eyes turn inward toward the nose | Synonyms: convergent strabismus, cross-eye, crossed eye |
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| estradiol | (noun) the most powerful female hormone that occurs naturally; synthesized and used to treat estrogen deficiency and breast cancer | Synonyms: oestradiol |
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| estragon | (noun) fresh leaves (or leaves preserved in vinegar) used as seasoning | Synonyms: tarragon |
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| (noun) aromatic perennial of southeastern Russia | Synonyms: Artemisia dracunculus, tarragon |
| estrangement | (noun) the feeling of being alienated from other people | Synonyms: alienation, disaffection |
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| (noun) separation resulting from hostility | Synonyms: alienation |
| estriol | (noun) a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency | Synonyms: oestriol |
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| estrogen | (noun) a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics | Synonyms: oestrogen |
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| estrone | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: Estronol, oestrone, theelin |
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