An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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exposé
  اسنه   
osneh

Fr.: exposé   

A formal exposition of facts.

From Fr. exposé, p.p. of exposer, "to → expose."

Noun from osnehâdan, → expose.

expose
  ۱، ۲) اسنهادن؛ ۲) نور دادن   
1, 2) osnehâdan; 2) nur dâdan (#)

Fr.: exposer   

1) To reveal, make known, make visible.
2) In imaging, to subject, as to the action of light, or other electromagnetic radiations.

M.E. exposen, from O.Fr. exposer "lay open, set forth," from L. exponere "set forth, lay open, exhibit," with contamination from poser "to lay, place" (→ position). doublet of expound.

1) Osnehâdan, from os-, → ex-, + nehâdan "to put, place," → position.
2) nur dâdan, from nur, → light + dâdan "to give," Mid.Pers. dâdan "to give;" O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives;" cf. Skt. dadáti "he gives;" Gk. didomi "I give;" L. dare "to give, offer;" PIE base *do- "to give."

exposition
  اسنهش   
osneheš

Fr.: exposition   

1) The act of setting forth information or a viewpoint.
2) Public exhibition or show.

Verbal noun of → expose.

exposure
  ۱) اسنهش؛ ۲) نورداد   
1) osneheš; 2) nurdâd

Fr.: pose, exposition   

1) The act of exposing; the fact or state of being exposed, → expose.
2) In optics, the total radiant energy incident on a surface per unit area. It is equal to the integral over time of the radiant flux density.

Verbal noun of → expose.

exposure meter
  اسنهش-سنج، نورداد-سنج   
osneheš-sanj, nurdâd-sanj

Fr.: posemètre   

In photography, an instrument used to measure the intensity of light from a scene to be photographed and to indicate the camera lens and shutter settings required to expose the film correctly.

exposure; → meter.

exposure time
  زمان ِ اسنهش، ~ نورداد   
zamân-e osneheš, ~ nurdâd

Fr.: temps de pose   

The length of time during which the receiver is irradiated.

exposure; → time.

express
  زهاویدن   
zohâvidan

Fr.: exprimer   

1) To transform ideas into words; utter or state.
2) Math: To → transform into equivalent → terms. For example by → expanding or → factorizing an → expression. See also → suppress, → impress.

M.E. expressen, O.Fr. espresser "to press, squeeze out; speak one's mind," M.L. expressare, frequentative of exprimere "represent, describe," literally "to press out," from → ex- "out" + pressare "to press, push," from L. premere "to press, hold fast, cover, compress."

Zohâvidan, from zo- variant of os- "out," → ex-, + hâv, from Av. hau- "to press, squeeze out;" cf. Mid.Pers. hunîdan "to express, extract (juice)," hâwan "mortar;" akin to Skt. sav- "to press, press out;" O.H.G. sou, O.E. sēaw "juice;" + -idan infinitive suffix.

expression
  زهاوش   
zohâveš

Fr.: expression   

1) The act or an instance of expressing.
2) Math.: A statement using mathematical quantities such as → scalars, → variables, → parameters, → functions, and → sets, as well as → relational and → logical  → operators such as → equality, → conjunction, → existence, → union, etc. (Steven. G. Krantz, ed., Dictionary of Algebra, Arithmetic, and Trigonometry, 2001).

express; → -tion.

extend
  استنیدن   
ostanidan (#)

Fr.: étendre   

To stretch out; draw out to the full length; to enlarge the scope of; to increase the length or duration of.

From O.Fr. estendre, from L. extendere "stretch out," from → ex- "out" + tendere "to stretch," see below.

Ostanidan, from os-, → ex- + tanidan as in Av. ustāna- "stretched out" (ustāna-zasta- "with outstretched hands"), cf. Skt. uttāná- "stretched out, spread out." Mod.Pers. tanidan "to spin, twist, weave;" Mid.Pers. tanitan, from Av. tan- to stretch, extend;" cf. Skt. tan- to stretch, extend," tanoti "stretches," tantram "loom;" Gk. teinein "to stretch, pull tight;" L. tendere "to stretch;" PIE base *ten- "to stretch."

extended object
  بر‌آخت ِ استنیده   
barâxt-e ostanidé

Fr.: objet étendu   

An object whose angular size exceeds the resolution of the instrument used to observe it.

extended; → object.

extended source
  خن ِ استنیده   
xan-e ostanidé

Fr.: source étendue   

In radio astronomy, a source whose angular extent could be measured, as distinguished from a point source.

extended; → source.

extension
  استنش   
ostaneš (#)

Fr.: extension   

An act or instance of extending; the state of being extended.
Physics: That property of a body by which it occupies space.
Math.: A filed F is said to be an extension of a field K if K is a subfield of F.

Verbal noun of → extend.

external
  بیرونی   
biruni (#)

Fr.: externe   

Of or pertaining to the outside or outer part.

M.E., from M.Fr. externe or directly from L. externus "outside, outward," from exterus, a comparative of → ex-, + → -al.

Biruni, adj. from birun "out, the outside," → out.

external photoelectric effect
  اسکر ِ شید-برقی ِ برونی   
oskar-e šid-barqi-ye boruni

Fr.: effet photoélectrique externe   

The → photoelectric effect in solids where free electrons are emitted from the surface of a substance (e.g., → semiconductor) when radiation of appropriate frequency falls on it. Also called → photoemissive effect.

external; → photoelectric; → effect.

external work
  کار ِ بیرونی   
kâr-e biruni

Fr.: travail externe   

The work done by a thermodynamic system as it expands against its surrounding environment. It is equal to ∫pdV, where p is the applied external pressure and V the volume, integrated from the initial V1 to final V2.

external; → work.

externalization
  برونش   
boruneš

Fr.: extériorisation   

Verbal noun of → externalize.

externalize + → -tion.

externalize
  برونیدن   
borunidan

Fr.: intériorisation   

1) To make external; embody in an outward form.
2) To regard or treat as being caused by externals; attribute to external causes (Dictionary.com).

external + → -ize.

extinction
  خاموشی   
xâmuši (#)

Fr.: extinction   

1) Dimming of light by an intervening medium (the Earth's atmosphere or the interstellar medium). It is usually due to both scattering and absorption.
2) Paleontology: The act or process of dying out or coming to an end, becoming extinct: the extinction of a species; → mass extinction.

Noun of extinct, from L. extinctus, p.p. of extinguere "to quench, wipe out," from → ex- "out" + stinguere "to quench," from PIE base *steig- "to prick, stick, pierce;" cf. Mod.Pers. tiz, tež, tig, tej, tij, tiq "sharp;" Av. tiγra- "pointed," tiγray- "arrow;" → deblur.

Xâmuši, noun of xâmuš "extinguished; silent," Mid.Pers. xâmôš "silent;" cf. Skt. amrs- "to bear patiently."

extinction coefficient
  همگر ِ خاموشی   
hamgar-e xâmuši

Fr.: coefficient d'extinction   

Gradient of apparent magnitude with air mass.

extinction; → coefficient.

extinction correction
  ارشایش ِ خاموشی   
aršâyeš-e xâmuši

Fr.: correction d'extinction   

In → photometric calibration, the correction for energy loss undergone by radiation due to the → atmospheric extinction. Extinction correction is done using → standard stars observed at different → airmasses.

extinction; → correction.

<< < -es -iv -ti 21- A r abe abs abs acc acc acc act act ada adi adu aff age alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg ari art ass ast ast ast atm ato att aur aut axi B r bac Bal Bar Bar Bay bec Ber Bet Bie bij bin bio bis bla bla blu blu bol Bor bou Bra bre bro Bug C-s cal Cam can car Car Cas cat cav cel cen cer Cha cha cha che cho cir cir cir cla clo clo clu coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cor cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl dar dat daw de- Deb dec dec dee def deg del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis diu dog Dop dou Dra dua dus dwa dyn e-f Ear ecl eco edu eig Ein ela ele ele ele Ele elo emi emp ene Enl env epi equ equ Eri est Euc eva evo exc exc exh Exo exp exp ext ext f(R fac fam fat fee Fer Fib fig fin fir fix fle flu foc for for for fra fre Fre fri fun fuz Gal gal gal Gam gau Gay gen Geo geo geo geo gim glo gov gra gra gra gra gre gro Gun hab hal han Har haz hea hel hel Hen Her het Hig hil hol Hoo hor hou Hub hum hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind Ind inf inf inf inf inn ins ins int int int int int int int int inv ion ion Irr iso iso iso jan jit Jul jus Kel ker kin kni La lam lan Lap las lat Lay Led Len let lif lig lin lin lin liq Lit loc log lon lou low lum lun Lym M d Mag mag mag mag mag mag maj man mar mas mas mat mea mea mec mem mer Mes met met mho mic Mie Mil min mis MKS MOd mol Mon moo mot mul mul myo nak Nas nat neb neg neu neu New New nit noi non non nor nor nuc nuc nul nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi pai Pan par par Par par pas Pav Pel per per per per Per per pha phi pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre Pri pri pri pro pro pro pro pro pro pro Pto pul pur qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret RHB rid rig ris roc Ros rot rub Rut Sag sam sat sca sca Sch sci Sea sec sec see sel sem sen set Sha sha shi shu sid sil sim sin SIS ski Slo smo Soc sol sol sol sol son sou spa spa spe spe spe sph spi spi Spo squ sta sta sta sta Ste ste ste sto str str str sub sub suc sun sup sup sup sup sur Swa syn syn tab tar tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru Tun Tus tym Typ ult unb und uni uni uns upp Urs vac van var Vei Ven ver vic Vir vir vis vol W 4 war wat wav wea wed wet wid win WN2 Wol wri xen yok zen zin > >>