| abele | (noun) a poplar that is widely cultivated in the United States; has white bark and leaves with whitish undersurfaces | Synonyms: aspen poplar, Populus alba, silver-leaved poplar, white aspen, white poplar |
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| accelerando | (noun) a gradually increasing tempo of music | - |
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| acceleration | (noun) the act of accelerating; increasing the speed | Synonyms: quickening, speedup |
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| (noun) an increase in rate of change | - |
| (noun) (physics) a rate of increase of velocity | - |
| accelerator | (noun) a valve that regulates the supply of fuel to the engine | Synonyms: throttle, throttle valve |
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| (noun) a scientific instrument that increases the kinetic energy of charged particles | Synonyms: atom smasher, particle accelerator |
| (noun) a pedal that controls the throttle valve | Synonyms: accelerator pedal, gas, gas pedal, gun, throttle |
| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: catalyst |
| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| agelessness | (noun) the quality of being timeless and eternal | - |
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| allele | (noun) (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character | Synonyms: allelomorph |
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| angiotelectasia | (noun) dilation and enlargement of arterioles | - |
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| antielectron | (noun) an elementary particle with positive charge; interaction of a positron and an electron results in annihilation | Synonyms: positron |
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| aposelene | (noun) apoapsis in orbit around the moon | Synonyms: apolune |
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| atelectasis | (noun) collapse of an expanded lung (especially in infants); also failure of pulmonary alveoli to expand at birth | - |
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| ateleiosis | (noun) a form of infantilism characterized by physical underdevelopment but normal intelligence | Synonyms: ateliosis |
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| baddeleyite | (noun) a mineral consisting of zirconium oxide | - |
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| bandelet | (noun) molding in the form of a ring; at top of a column | Synonyms: annulet, bandelette, bandlet, square and rabbet |
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| bandelette | (noun) molding in the form of a ring; at top of a column | Synonyms: annulet, bandelet, bandlet, square and rabbet |
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| beleaguering | (noun) the action of an armed force that surrounds a fortified place and isolates it while continuing to attack | Synonyms: besieging, military blockade, siege |
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| belemnite | (noun) a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae | - |
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| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| blamelessness | (noun) a state of innocence | Synonyms: guiltlessness, inculpability, inculpableness |
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| blastocele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocoel, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoel, cleavage cavity, segmentation cavity |
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| bonelet | (noun) a small bone; especially one in the middle ear | Synonyms: ossicle, ossiculum |
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| bracelet | (noun) jewelry worn around the wrist for decoration | Synonyms: bangle |
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| (noun) a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist | Synonyms: watch bracelet, watchband, watchstrap, wristband |
| capelet | (noun) a small cape that covers the shoulders and is worn predominantly by women. | - |
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| carelessness | (noun) failure to act with the prudence that a reasonable person would exercise under the same circumstances | Synonyms: neglect, negligence, nonperformance |
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| (noun) the quality of not being careful or taking pains | Synonyms: sloppiness |
| ceaselessness | (noun) the quality of something that continues without end or interruption | Synonyms: continuousness, incessancy, incessantness |
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| celebrant | (noun) an officiating priest celebrating the Eucharist | - |
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| (noun) a person who is celebrating | Synonyms: celebrater, celebrator |
| celebrater | (noun) a person who is celebrating | Synonyms: celebrant, celebrator |
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| celebration | (noun) any joyous diversion | Synonyms: festivity |
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| (noun) the public performance of a sacrament or solemn ceremony with all appropriate ritual | Synonyms: solemnisation, solemnization |
| (noun) a joyful occasion for special festivities to mark some happy event | Synonyms: jubilation |
| celebrator | (noun) a person who is celebrating | Synonyms: celebrant, celebrater |
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| celebrity | (noun) a widely known person | Synonyms: famous person |
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| (noun) the state or quality of being widely honored and acclaimed | Synonyms: fame, renown |
| celecoxib | (noun) a Cox-2 inhibitor (trade name Celebrex) that relieves pain and inflammation without harming the digestive tract | Synonyms: Celebrex |
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| celeriac | (noun) thickened edible aromatic root of a variety of celery plant | Synonyms: celery root |
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| (noun) grown for its thickened edible aromatic root | Synonyms: Apium graveolens rapaceum, celery root, knob celery, root celery, turnip-rooted celery |
| celerity | (noun) a rate that is rapid | Synonyms: quickness, rapidity, rapidness, speediness |
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| celery | (noun) stalks eaten raw or cooked or used as seasoning | - |
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| (noun) widely cultivated herb with aromatic leaf stalks that are eaten raw or cooked | Synonyms: Apium graveolens dulce, cultivated celery |
| celesta | (noun) a musical instrument consisting of graduated steel plates that are struck by hammers activated by a keyboard | - |
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| celestite | (noun) a mineral consisting of strontium sulphate | - |
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| chamaeleon | (noun) lizard of Africa and Madagascar able to change skin color and having a projectile tongue | Synonyms: chameleon |
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| chameleon | (noun) lizard of Africa and Madagascar able to change skin color and having a projectile tongue | Synonyms: chamaeleon |
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| (noun) a changeable or inconstant person | - |
| changelessness | (noun) the quality of being unchangeable; having a marked tendency to remain unchanged | Synonyms: unchangeability, unchangeableness, unchangingness |
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| (noun) the property of remaining unchanged | - |
| chiseler | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseller, defrauder, gouger, grifter, scammer, swindler |
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| clientele | (noun) customers collectively | Synonyms: business, patronage |
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| coelenterate | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: cnidarian |
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| coelenteron | (noun) the saclike body cavity of a coelenterate | - |
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| colpocele | (noun) hernia projecting into the vagina | Synonyms: vaginocele |
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| colpocystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: cystocele |
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| corselet | (noun) a piece of body armor for the trunk; usually consists of a breastplate and back piece | Synonyms: corslet |
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| cystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: colpocystocele |
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| cytoskeleton | (noun) a microscopic network of actin filaments and microtubules in the cytoplasm of many living cells that gives the cell shape and coherence | - |
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| deceleration | (noun) the act of decelerating; decreasing the speed | - |
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| (noun) a decrease in rate of change | Synonyms: retardation, slowing |
| (noun) (physics) a rate of decrease in velocity | - |
| defencelessness | (noun) the property of being helpless in the face of attack | Synonyms: defenselessness, unprotectedness |
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| defenselessness | (noun) the property of being helpless in the face of attack | Synonyms: defencelessness, unprotectedness |
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| delectability | (noun) extreme appetizingness | Synonyms: deliciousness, lusciousness, toothsomeness |
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| delectation | (noun) act of receiving pleasure from something | Synonyms: enjoyment |
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| (noun) a feeling of extreme pleasure or satisfaction | Synonyms: delight |
| delegacy | (noun) the appointment of a delegate | - |
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| (noun) a group of representatives or delegates | Synonyms: commission, delegation, deputation, mission |
| (noun) the state of serving as an official and authorized delegate or agent | Synonyms: agency, representation |
| delegate | (noun) a person appointed or elected to represent others | - |
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| delegating | (noun) authorizing subordinates to make certain decisions | Synonyms: delegation, deputation, relegating, relegation |
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| delegation | (noun) authorizing subordinates to make certain decisions | Synonyms: delegating, deputation, relegating, relegation |
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| (noun) a group of representatives or delegates | Synonyms: commission, delegacy, deputation, mission |
| deletion | (noun) the act of deleting something written or printed | - |
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| (noun) the omission that is made when an editorial change shortens a written passage | Synonyms: cut, excision |
| (noun) (genetics) the loss or absence of one or more nucleotides from a chromosome | - |
| (noun) any process whereby sounds or words are left out of spoken words or phrases | Synonyms: omission |
| dielectric | (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity | Synonyms: insulator, nonconductor |
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| dielectrolysis | (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, electrophoresis, ionophoresis |
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| drupelet | (noun) a small part of an aggregate fruit that resembles a drupe | - |
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| dueler | (noun) a person who fights duels | Synonyms: duelist, dueller, duellist |
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| elecampane | (noun) tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally | Synonyms: Inula helenium |
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| elect | (noun) an exclusive group of people | Synonyms: chosen |
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| election | (noun) the act of selecting someone or something; the exercise of deliberate choice | - |
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| (noun) a vote to select the winner of a position or political office | - |
| (noun) the predestination of some individuals as objects of divine mercy (especially as conceived by Calvinists) | - |
| (noun) the status or fact of being elected | - |
| electioneering | (noun) the campaign of a candidate to be elected | Synonyms: campaigning, candidacy, candidature, political campaign |
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| (noun) persuasion of voters in a political campaign | Synonyms: bell ringing, canvassing |
| elective | (noun) a course that the student can select from among alternatives | Synonyms: elective course |
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| electiveness | (noun) Quality or state in which choice or discretion is allowed. | Synonyms: optionality |
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| elector | (noun) a citizen who has a legal right to vote | Synonyms: voter |
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| electorate | (noun) the body of enfranchised citizens; those qualified to vote | - |
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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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