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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Number of Results: 12934 Search : far
existence theorem
  فربین ِ هستومندی، ~ هستی   
farbin-e hastumandi, ~ hasti

Fr.: théorème d'existence   

Math: A theorem that asserts the existence of at least one object, such as the → solution to a → problem or → equation.

existence; → theorem.

existent
  هستومند   
hastumand (#)

Fr.: existant   

Existing; having existence.

exist.

existential
  هستیال   
hastiyâl

Fr.: existentiel   

1) Of or relating to → existence, especially  human existence.
2) Philo.:  Pertaining to what exists, and is thus known by experience rather  than reason; empirical as opposed to theoretical.
3) Logic: Denoting or relating to a → formula or → proposition asserting the existence of at least one object fulfilling a given condition; containing an → existential quantifier.
4) Of or relating to → existentialism (Dictionary.com).

From L.L. existentialis, → existence, → -al.

Hastiyâl, from hasti, → existence, + -al a suffix of attributes forming adjectives that often become nouns, in this case preferred to -i because hasti ends in -i, → -al.

existential quantifier
  چنداگر ِ هستیال   
candâgar-e hastiyâl

Fr.: quantificateur existentiel   

A symbol of → predicate logic which expresses that the statements within its scope are → true for at least one instance of something. The symbol ∃ is used as the existential quantifier. Existential quantifiers are normally used in logic in → conjunction with → predicate symbols, which say something about a → variable or → constant, in this case the variable being quantified (→ quantify, → quantification).

existential; → quantifier.

existentialism
  هستیال‌باوری، هستیال‌گرایی   
hastiyâl-bâvari, hastiyâl-gerâyi

Fr.: existentialisme   

A philosophical attitude associated especially with Heidegger, Jaspers, Marcel, and  Sartre, and opposed to → rationalism and  → empiricism, that stresses the individual's  unique position as a self-determining agent responsible for the authenticity of his or  her choices (Dictionary.com).

existential; → -ism.

existentialist
  هستیال‌باور، هستیال‌گرا   
hastiyâl-bâvar, hastiyâl-gerâ

Fr.: existentialiste   

An advocate of → existentialism.

existential; → -ist.

exit
  اسرفت   
osraft

Fr.: sortie   

A way or passage out.

From L. exit "he or she goes out," from exire "to go out," from → ex- "out" + ire "to go;" cf. Gk ion " going," neut. pr.p. of ienai "to go;" Pers. ây-, â- present stem of âmadan "to come;" O.Pers. aitiy "goes;" Av. ay- "to go, to come," aēiti "goes;" Skt. e- "to come near," eti "arrival;" Goth. iddja "went," Lith. eiti "to go;" Russ. idti "to go."

Osraft, from os-, → ex- "out," + raft, raftan "to go, walk," → entrance.

exit pupil
  مردمک ِ اسرفت   
mardomak-e osraft

Fr.: pupille de sortie   

In an → optical system, the → image of the → aperture stop formed by the elements following it. See also → entrance pupil.

exit; → pupil.

exo-
  برون-   
borun- (#)

Fr.: exo-   

Prefix meaning "outside; outer; external" used in the formation of compound words: exoplanet, exosphere, exocentric.

From Gk. exo "outside," used in forming scientific terms, → ex-.

Borun-, from borun "out, the outside" (Mid.Pers. bêron, from "outside, out, away" + rôn "side, direction;" Av. ravan- "(course of a) river").

exobiology
  برون‌زیست‌شناسی   
borun zistšenâsi

Fr.: exobiologie   

The study of life beyond the Earth's atmosphere, as on other planets; also → astrobiology.

exo-; → biology.

exoEarth
  برون‌زمین   
borun-zamin

Fr.: exoterre   

An → exoplanet similar to Earth.

exo- + → earth.

exolife
  برونزیست   
borunzist

Fr.: vie extraterrestre   

extraterrestrial life.

exo-; → life.

ExoMars
  اگزو-مارس   
ExoMars

Fr.: ExoMars   

A → European Space Agency (ESA) program to investigate the Martian environment and to demonstrate new technologies paving the way for a future Mars sample return mission in the 2020's. Two missions are foreseen: one consisting of an Orbiter plus an Entry, Descent and Landing Demonstrator Module (EDM), launched in 2016, and the other, featuring a rover, with a launch date of 2018. Both missions will be carried out in cooperation with Russia's Roscosmos space agency. The ExoMars program will demonstrate a number of essential flight and in-situ enabling technologies that are necessary for future exploration missions, such as an international Mars Sample Return mission. At the same time, a number of important scientific investigations will be carried out. The 2016 mission included a Trace Gas Orbiter (TGO) and an EDM. The Orbiter will carry scientific instruments to detect and study atmospheric trace gases, such as methane. The EDM will contain sensors to evaluate the lander's performance as it descends, and additional sensors to study the environment at the landing site. The 2018 mission includes a rover that will carry a drill and a suite of instruments dedicated to exobiology and geochemistry research.

ExoMars, short for "→ exobiology on → Mars."

exomoon
  برونمانگ   
borunmâng

Fr.: exolune   

A natural → satellite orbiting an → extrasolar planet.

exo-; → moon.

exoplanet
  برون‌سیاره   
borun-sayyâreh

Fr.: exoplanète   

Same as → extrasolar planet.

exo- + → planet.

exoplanetary
  برون‌سیاره‌ای   
borun-sayyâre-yi

Fr.: exoplanétaire   

Of, relating to, or resembling an → exoplanet or exoplanets.

exoplanet; → -ary.

exoplanetary system
  راژمان ِ برون‌سیاره‌ای   
râſmân-e borun-sayyâre-yi

Fr.: système exoplanétaire   

A → planetary system consisting of → exoplanets orbiting a star other than Sun.

exoplanetary; → system.

exoplanetary transit
  گذر ِ برون‌سیاره‌ای   
gozar-e borun-sayyâre-yi

Fr.: transit d'exoplanète   

The passage of an → exoplanet across the face its star.

exoplanetary; → transit.

exosphere
  برون‌سپهر   
borun-sepehr

Fr.: exosphère   

1) The outermost portion of the Earth's → atmosphere. Extremely tenuous, it lies above the → ionosphere from a height of about 500 km, to the edge of → interplanetary space.
2) An extremely tenuous kind of atmosphere surrounding a → solar system body. Since the → mean free path is much greater than the atmospheric scale height. The → atoms or → molecules never collide with each other. → lunar exosphere.

exo- + → sphere.

exothermic
  گرمازا   
garmâzâ (#)

Fr.: exothermique   

Relating to or describing any process in which a system releases heat to its surrounding environment.

From → exo- + -therm, from Gk. therme "heat," from PIE *ghwerm-/*ghworm- "warm;" cf. Pers. garm "warm;" L. fornax "an oven;" O.E. wearm "warm" + → -ic.

From garmâ "heat, warmth" (Mid.Pers. garm; O.Pers./Av. garəma- "hot, warm;" cf. Skt. gharmah "heat;" Gk. thermos "warm;" L. formus "warm;" P.Gmc. *warmaz; O.E. wearm; O.H.G., Ger. warm; PIE *ghworm-/*ghwerm-, as above) + verbal adj. and agent noun of zâdan "to bring foth, give birth," (Mid.Pers. zâtan; Av. zan- "to bear, give birth to a child, be born," infinitive zazâite, zâta- "born;" cf. Skt. janati "begets, bears;" L. gignere "to beget;" PIE base *gen- "to give birth, beget").

<< < -es -iv -ti 217 A s abe abs abs acc acc Ach act act ADa adi adv aff age Alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg arm art ass ast ast ast atm ato att aur aut axi B-t Bai Bal bar bar Be bed Bes BHB bif bim bin Bio bis bla ble blu bod Bol bor bou bra Bre bro Bul cag cal can Can car Car Cas cat CCD cel cen Cet cha cha che che chr cir cir cit 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 cri cro cry cum cur cyc d'A dar dat DB dea dec dec dec def def deh del den dep des det deu dia dif dif dif dim dip Dir dis dis dis dis dis div dom dou dou dri duo dus dyn dyn ear eas ecl Edd eff Ein eje ele ele ele ele ell emb emi enc ene ent eph equ equ equ eru eth Eul eve ewe exc exc exi exo exp ext ext ext fab fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre Fre fro fus G t gal gal Gam gas Gau Gem gen geo geo geo gia gla God gra gra gra gra Gre Gre gue GZK Haf hal har har He hea hel hel Her Her hid hig hip hom hor hot Hub Hug hur hyd hyd hyg hyp ice ide ima imp imp imp inc ind ind ine inf inf inf ini ins ins int int int int int int int int inv inv ion iro Isl iso iso Jac jet jud jur Kel Kep kil Klo kur Lag lam Lap Lar lat law lea len lep lib lig Lin lin lin liq lit loc log lon Lor low lum lun Lut Lyo mac mag mag mag Mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil min mir mix mod mol mom Moo mos Mu mul mus nad nas nat neb neg net neu New New nig Noe non non non nor nuc nuc nul nut Obe obl obs occ Oct off old one ope opp opt opt orb ord org Ori osc oth ova oxi P-w pal par par par par Pas pat pej per per per per per per pha phi pho pho pho phy pin Pla pla pla pla pla plu Poi pol pol pol poo pos pos pot pra pre pre pre Pre pri pri pro pro pro pro pro pro pro pse pul Pur qua qua qua qua que rad rad rad rad rad rad raf ran rar ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret rev ric rig rin roc ROS rot Rox rus Sad sam sat sca sca Sch sci sea sec sec see sel sem sen ser Sgr sha shi sho sid sig sim sin Sir ske sli Smo soc sol sol sol Sol Som 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 tac tas tel tem ter tes the the the the Tho thr tid tim tit top tot tra tra tra tra tre tri Tro tru tun tut Tyn typ ult unb und uni uni uns ups Urv vag van vec vei Ven ver Vic Vir vir vis vol W b war wav wav wea wee Wey Wid win WN2 Wol wro XMM YOR zen zir > >>