eosin
eosin: n. a red fluorescent dyestuff used esp. as a stain in optical microscopy. [Gk eos dawn + -IN]

expunge
expunge: v.tr. (foll. by from) erase, remove (esp. a passage from a book or a name from a list). øøexpunction n. expunger n. [L expungere expunct- (as EX-(1), pungere prick)]

extradition
extradition: n.
1 the extraditing of a person accused or convicted of a crime.
2 Psychol. the localizing of a sensation at a distance from the centre of sensation.

elate
elate: v. & adj. --v.tr.
1 (esp. as elated adj.) inspirit, stimulate.
2 make proud. --adj. archaic in high spirits; exultant, proud. øøelatedly adv. elatedness n. elation n. [ME f. L efferre elat- raise]

elaborate
elaborate: adj. & v. --adj.
1 carefully or minutely worked out.
2 highly developed or complicated. --v.tr.
1 a work out or explain in detail. b (absol.) go into details (I need not elaborate).
2 produce by labour.
3 (of a natural agency) produce (a substance etc.) from its elements or sources. øøelaborately adv. elaborateness n. elaboration n. elaborative adj. elaborator n. [L elaboratus past part. of elaborare (as E-, labor work)]

elegant
elegant: adj.
1 graceful in appearance or manner.
2 tasteful, refined.
3 (of a mode of life etc.) of refined luxury.
4 ingeniously simple and pleasing.
5 US excellent. øøelegance n. elegantly adv. [F ÷l÷gant or L elegant-, rel. to eligere: see ELECT]

electron
electron: n. a stable elementary particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. øelectron beam a stream of electrons in a gas or vacuum. electron diffraction the diffraction of a beam of electrons by atoms or molecules, used for determining crystal structures etc. electron gun a device for producing a narrow stream of electrons from a heated cathode. electron lens a device for focusing a stream of electrons by means of electric or magnetic fields. electron microscope a microscope with high magnification and resolution, employing electron beams in place of light and using electron lenses. electron pair an electron and a positron. electron spin resonance a spectroscopic method of locating electrons within the molecules of a paramagnetic substance. °Abbr.: ESR. [ELECTRIC + -ON]

extension
extension: n.
1 the act or an instance of extending; the process of being extended.
2 prolongation; enlargement.
3 a part enlarging or added on to a main structure or building.
4 an additional part of anything.
5 a a subsidiary telephone on the same line as the main one. b its number.
6 a an additional period of time, esp. extending allowance for a project etc. b permission for the sale of alcoholic drinks until later than usual, granted to licensed premises on special occasions.
7 extramural instruction by a university or college (extension course).
8 extent, range.
9 Logic a group of things denoted by a term. øøextensional adj. [ME f. LL extensio (as EXTEND)]

excentric
excentric: var. of ECCENTRIC (in technical senses).

embouchure
embouchure: n.
1 Mus. a the mode of applying the mouth to the mouthpiece of a brass or wind instrument. b the mouthpiece of some instruments.
2 the mouth of a river.
3 the opening of a valley. [F f. s'emboucher discharge itself by the mouth (as EN-(1), bouche mouth)]

electret
electret: n. Physics a permanently polarized piece of dielectric material, analogous to a permanent magnet. [ELECTRICITY + MAGNET]

elastomer
elastomer: n. a natural or synthetic rubber or rubber-like plastic. øøelastomeric adj. [ELASTIC, after isomer]

eternal
eternal: adj.
1 existing always; without an end or (usu.) beginning in time.
2 essentially unchanging (eternal truths).
3 colloq. constant; seeming not to cease (your eternal nagging). øthe Eternal God. Eternal City Rome. eternal triangle a complex of emotional relationships involving two people of one sex and one of the other sex. øøeternality n. eternalize v.tr. (also -ise). eternally adv. eternalness n. eternize v.tr. (also -ise). [ME f. OF f. LL aeternalis f. L aeternus f. aevum age]

ethiopian
Ethiopian: n. & adj. --n.
1 a a native or national of Ethiopia in NE Africa. b a person of Ethiopian descent.
2 archaic a Black person. --adj. of or relating to Ethiopia. [Ethiopia f. L Aethiops f. Gk Aithiops f. aitho burn + ops face]

expander
exclamatory
exclamatory: adj. of or serving as an exclamation.

effective
effective: adj. & n. --adj.
1 having a definite or desired effect.
2 powerful in effect; impressive.
3 a actual; existing in fact rather than officially or theoretically (took effective control in their absence). b actually usable; realizable; equivalent in its effect (effective money; effective demand).
4 coming into operation (effective as fro.
1 May).
5 (of manpower) fit for work or service. --n. a soldier available for service. øøeffectively adv. effectiveness n. [ME f. L effectivus (as EFFECT)]

emotional
emotional: adj.
1 of or relating to the emotions.
2 (of a person) liable to excessive emotion.
3 expressing or based on emotion (an emotional appeal).
4 likely to excite emotion (an emotional issue). øøemotionalism n. emotionalist n. emotionality n. emotionalize v.tr. (also -ise). emotionally adv.

electric
electric: adj. & n. --adj.
1 of, worked by, or charged with electricity; producing or capable of generating electricity.
2 causing or charged with sudden and dramatic excitement (the news had an electric effect; the atmosphere was electric). --n.
1 an electric light, vehicle, etc.
2 (in pl.) electrical equipment. øelectric blanket a blanket that can be heated electrically by an internal element. electric blue a steely or brilliant light blue. electric chair (in the US) an electrified chair used for capital punishment. electric eel an eel-like freshwater fish, Electrophorus electricus, native to S. America, that kills its prey by electric shock. electric eye colloq. a photoelectric cell operating a relay when the beam of light illuminating it is obscured. electric fence a fence charged with electricity, often consisting of one strand. electric field a region of electrical influence. electric fire an electrically operated incandescent or convector heater, usu. portable and for domestic use. electric guitar a guitar with a built-in electrical sound pick-up rather than a soundbox. electric orga.
1 Biol. the organ in some fishes giving an electric shock.
2 Mus. an electrically-operated organ. electric ray any of several rays which can give an electric shock (see RAY(2) )). electric shaver (or razor) an electrical device for shaving, with oscillating blades behind a metal guard. electric shock the effect of a sudden discharge of electricity on a person or animal, usually with stimulation of the nerves and contraction of the muscles. electric storm a violent disturbance of the electrical condition of the atmosphere. øøelectrically adv. [mod.L electricus f. L electrum f. Gk elektron amber, the rubbing of which causes electrostatic phenomena]

enclosure
enclosure: n. (also inclosure.
1 the act of enclosing, esp. of common land.
2 Brit. an enclosed space or area, esp. for a special class of persons at a sporting event.
3 a thing enclosed with a letter.
4 an enclosing fence etc. [AF & OF (as ENCLOSE)]