-
21 electromagnetic waves
[ilektrəməɡ'netik](waves of energy travelling through space etc, eg light waves, X-rays, radio waves.) onde électromagnétique -
22 focus
['foukəs] 1. plurals - focuses, foci; noun1) (the point at which rays of light meet after passing through a lens.) foyer2) (a point to which light, a look, attention etc is directed: She was the focus of everyone's attention.) point de mire2. verb1) (to adjust (a camera, binoculars etc) in order to get a clear picture: Remember to focus the camera / the picture before taking the photograph.) mettre au point2) (to direct (attention etc) to one point: The accident focussed public attention on the danger.) concentrer•- focal- in - out of focus -
23 gamma
['ɡæmə] -
24 infra-red
[infrə'red]((of rays) below the red end of the spectrum.) infrarouge -
25 radiation
noun (rays of light, heat etc or of any radioactive substance.) radiation -
26 radioactive
[reidiəu'æktiv]1) ((of some substances, eg uranium) giving off rays which can be dangerous, but which can also be used in eg medicine: radioactive metals.) radioactif2) (containing radioactive substances: radioactive waste/dust.) radioactif• -
27 radiotherapy
[reidiəu'Ɵerəpi](the treatment of disease by X-rays and other forms of radiation.) radiothérapie -
28 star
1. noun1) (the fixed bodies in the sky, which are really distant suns: The Sun is a star, and the Earth is one of its planets.) étoile2) (any of the bodies in the sky appearing as points of light: The sky was full of stars.) étoile3) (an object, shape or figure with a number of pointed rays, usually five or six, often used as a means of marking quality etc: The teacher stuck a gold star on the child's neat exercise book; a four-star hotel.) étoile4) (a leading actor or actress or other well-known performer eg in sport etc: a film/television star; a football star; ( also adjective) She has had many star rôles in films.) vedette2. verb1) (to play a leading role in a play, film etc: She has starred in two recent films.) être la vedette de2) ((of a film etc) to have (a certain actor etc) as its leading performer: The film starred Elvis Presley.) avoir pour vedette•- stardom- starry - starfish - starlight - starlit - star turn - see stars - thank one's lucky stars -
29 sun
1. noun1) (the round body in the sky that gives light and heat to the earth: The Sun is nearly 150 million kilometres away from the Earth.) soleil2) (any of the fixed stars: Do other suns have planets revolving round them?) soleil3) (light and heat from the sun; sunshine: We sat in the sun; In Britain they don't get enough sun; The sun has faded the curtains.) soleil2. verb(to expose (oneself) to the sun's rays: He's sunning himself in the garden.) (s')exposer au soleil- sunless- sunny - sunniness - sunbathe - sunbeam - sunburn - sunburned - sunburnt - sundial - sundown - sunflower - sunglasses - sunlight - sunlit - sunrise - sunset - sunshade - sunshine - sunstroke - suntan - catch the sun - under the sun -
30 sunburn
noun (the brown or red colour of the skin caused by exposure to the sun's rays.) bronzage -
31 sunflower
noun (a type of large yellow flower with petals like rays of the sun, from whose seeds we get oil.) tournesol -
32 ultraviolet
((of light) consisting of rays from the invisible part of the spectrum beyond the purple, that have an effect on the skin, eg causing suntan.) ultraviolet -
33 X-ray
noun ((the process of taking) a photograph using X-rays: I'm going to hospital for an X-ray; We'll take an X-ray of your chest; ( also adjective) an X-ray photograph.) radiographie -
34 converge
converge vi converger (at à) ; to converge on [people] converger sur [place] ; [rays, paths etc] converger vers [point]. -
35 dart
A n1 ⇒ Games and sports Sport fléchette f ; (game of) darts partie f de fléchettes ; to play darts jouer aux fléchettes ;3 ( movement) to make a dart for/at sth se précipiter vers/sur qch ;4 Sewing pince f.B vi s'élancer comme une flèche (at sur) ; to dart in/out/away entrer/sortir/filer comme une flèche. -
36 focus
1 ( focal point) foyer m ; to be out of focus [device] ne pas être au point ; [image] être flou ; to be in focus être au point ; to go out of focus [device] se dérégler ; [image] devenir flou ; to bring sth into focus mettre qch au point ; to come into focus se rapprocher de la mise au point ;3 ( centre of interest) centre m, foyer m ; to become the focus of controversy devenir le centre de la controverse ; to become a focus for the press devenir le centre d'intérêt de la presse ; to provide a focus for research fournir un centre d'intérêt à la recherche ;2 ( adjust) mettre [qch] au point, régler [lens, microscope, camera] ; to focus one's lens on faire la mise au point sur [object] ;3 ( concentrate) concentrer [attention, mind] (on sur).1 ( home in) to focus on [rays] converger sur ; [astronomer, photographer, camera] faire le point or la mise au point sur ; [eyes, gaze, attention] se fixer or se concentrer sur ;1 [telescope, image] au point ;2 [person] déterminé ; she's very focus elle est très déterminée. -
37 force
A n1 (physical strength, impact) (of blow, explosion, collision, earthquake) force f ; ( of sun's rays) puissance f ; ( of fall) choc m ; he was knocked over by the force of the blast/the blow il est tombé sous la force de l'explosion/du coup ; I hit him with all the force I could muster je l'ai frappé de toutes mes forces ;2 gen, Mil ( physical means) force f ; to use force recourir à or employer la force ; by force par la force ; by force of arms, by military force à la force des armes ;3 fig ( strength) (of intellect, memory, enthusiasm, logic, grief) force f ; by ou out of ou from force of habit/of circumstance/of numbers par la force de l'habitude/des circonstances/du nombre ; ‘no,’ she said with some force ‘non,’ a-t-elle dit avec force ; to have the force of law avoir force de loi ;4 ( strong influence) force f ; a force for good/change une force agissant pour le bien/le changement ; the forces of evil les forces du mal ; she's a force in the democratic movement c'est un personnage important du mouvement démocratique ; market forces forces du marché ; this country is no longer a world force ce pays n'est plus une puissance mondiale ;5 ¢ ( organized group) forces fpl ; expeditionary/peacekeeping force forces expéditionnaires/de maintien de la paix ; naval/ground force forces navales/terrestres ; ⇒ labour force, workforce, task force etc ;7 Phys force f ; centrifugal/centripetal force force centrifuge/centripète ; force of gravity pesanteur f ;1 (in large numbers, strength) en force ;D vtr1 (compel, oblige) forcer ; to force sb/sth to do gen forcer qn/qch à faire ; to be forced to do gen être forcé de faire ; he forced his voice to remain calm il s'est forcé à garder une voix calme ; to force a smile/a laugh se forcer à sourire/à rire ; the earthquake forced the evacuation of hundreds of residents le tremblement de terre a provoqué or entraîné l'évacuation de plusieurs centaines d'habitants ; protesters have forced a public inquiry les protestataires ont exigé et obtenu que l'on ouvre une enquête publique ; to force a bill through parliament forcer or obliger le parliament à voter un projet de loi ;2 (push, thrust) to force one's way through [sth] se frayer un chemin à travers or dans [crowd, jungle] ; to force sb to the ground/up against sth plaquer qn au sol/contre qch ; she forced him to his knees elle l'a forcé à se mettre à genoux ; the car forced the motorbike off the road/into the ditch la voiture a forcé la moto à quitter la route/à aller au fossé ; bad weather forced him off the road for a week le mauvais temps l'a empêché de prendre la route pendant une semaine ; she forced her way to the top through sheer perseverance elle est parvenue au sommet grâce à beaucoup de persévérance ;3 ( apply great pressure to) forcer [door, window, lock, safe, engine, meter] ; forcer sur [screw] ; to force an entry Jur entrer par effraction ; to force the pace forcer l'allure ;E v refl1 ( push oneself) to force oneself se forcer (to do à faire) ;2 ( impose oneself) to force oneself on sb imposer sa présence à qn ; I wouldn't want to force myself on you je ne cherche pas à m'imposer.to force sb's hand forcer la main à qn.■ force back:▶ force [sth] back, force back [sth]1 lit repousser, obliger [qch] à reculer [crowd, army] ; she forced him back against the wall elle l'a repoussé or plaqué contre le mur ;2 fig réprimer [emotion, tears, anger].■ force down:▶ force [sth] down, force down [sth]1 ( cause to land) forcer [qch] à se poser [aircraft] ;2 ( eat reluctantly) se forcer à avaler [food] ; to force sth down sb forcer qn à manger qch ; don't force your ideas down my throat ○ ! ne m'impose pas tes idées! ;3 ( reduce) gen, Fin diminuer [qch] (de force) [prices, wages, output] ; réduire [qch] (de force) [currency value, demand, profits, inflation] ; to force down unemployment faire baisser le taux de chômage ;4 ( squash down) tasser [contents, objects].■ force in:▶ force [sth] in, force in [sth] ( into larger space) faire entrer [qch] de force ; ( into small opening) enfoncer [qch] de force.■ force into:▶ force [sb/sth] into sth/doing1 ( compel) forcer [qn/qch] à faire ; to be forced into doing être forcé de faire ; I was forced into it on m'a forcé à le faire ;2 (push, thrust) she forced him into the car elle l'a fait entrer de force dans la voiture ; he forced his clothes into a suitcase il a tassé ses vêtements dans une valise ; he forced his way into the house il est entré de force dans la maison.■ force on:▶ force [sth] on sb imposer [qch] à qn, forcer qn à accepter [qch] ; the decision was forced on him il a été forcé de prendre cette décision ; team X forced a draw on team Y l'équipe X a arraché un match nul à l'équipe Y.■ force open:▶ force [sth] open, force open [sth] forcer [door, window, box, safe] ; she forced the patient's mouth open elle a ouvert la bouche du malade de force ; he forced his eyes open il s'est forcé à ouvrir les yeux.■ force out:▶ force [sth] out, force out [sth] ( by physical means) faire sortir [qch] par la force [invader, enemy, object] ; enlever [qch] de force [cork] ; the government was forced out in the elections les élections ont forcé or obligé le gouvernement à quitter le pouvoir ; she forced out a few words elle s'est forcée à dire quelques mots ; to force one's way out (of sth) s'échapper (de qch) par la force ; to force sth out of sb arracher qch à qn [information, apology, smile, confession] ; the injury forced him out of the game cette blessure l'a forcé à abandonner le jeu.▶ force [sth] through, force through [sth] faire adopter [legislation, measures].■ force up:▶ force [sth] up, force up [sth] [inflation, crisis, situation] faire augmenter [prices, costs, demand, unemployment] ; [government, company, minister] augmenter (de force) [prices, output, wages] ; relever [exchange rate]. -
38 slant
slant, US [transcription][sl_nt]A n1 ( perspective) point m de vue (on sur) ; with a European slant d'un point de vue européen ; to give a new slant on sth offrir un angle nouveau sur qch ;3 ( slope) pente f ; the floor has a slant le plancher est en pente ; to hang at ou on a slant [painting] être de travers ;4 Print barre f oblique.B vtr1 ( twist) présenter [qch] avec parti pris [story, facts] ;2 ( lean) incliner [object].C vi [floor, ground] être en pente ; [handwriting] pencher (to vers) ; [painting] être de travers ; rays of sun slanted through the trees/the window des rayons de soleil passaient obliquement à travers les arbres/la fenêtre.D slanting pres p adj [roof, floor] en pente ; slanting rain pluie f qui tombe en oblique ; slanting eyes yeux mpl bridés. -
39 actinic
actinic [æk'tɪnɪk]Physics actinique►► actinic balance bolomètre m;actinic rays rayons mpl actiniques ou chimiques;actinic spectrum spectre m chimique -
40 cathode
cathode ['kæθəʊd]1 nouncathode f(beam, screen) cathodique►► Electricity cathode rays rayons mpl cathodiques;Electricity cathode ray tube tube m cathodique;Electricity cathode ray tube monitor moniteur m à tube cathodique;cathode sputtering pulvérisation f cathodique, ionoplastie f
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