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: 12948 Search : far
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").

exotic
  اسگانیک   
osgânik

Fr.: exotique   

1) Of foreign origin or character; not native; introduced from abroad, but not fully naturalized or acclimatized.
2) Strikingly unusual or strange in effect or appearance.
3) Of a uniquely new or experimental nature (Dictionary.com).
See: → exotic star.

M.E., from M.Fr. exotique and directly from L. exoticus, from Gk. exotikos "foreign," literally "from the outside," from → exo- "outside."

Osgânik, from os-, → ex-, + gân relation suffix, from Mid.Pers. -gânag, -gâna, + -ik, → -ic.

exotic star
  ستاره‌ی ِ اسگانیک   
setâre-ye osgânik

Fr.: étoile exotique   

A hypothetical → compact object composed of particles other than electrons, protons, and neutrons balanced against → gravitational collapse by → degeneracy pressure of corresponding quantum properties.

exotic; → star.

expand
  ۱) سپانیدن؛ ۲) سپانیده شدن   
1) sopânidan; 2) sopânide šodan

Fr.: 1) dilater, agrandir, développer; 2) se dilater, s'agrandir, se développer   

1a) To change (something) from a smaller form and/or size to a larger one.
1b) To increase the extent, number, volume or scope of (something).
1c) To express (something) at length and/or in detail.
1d) Math.: To write (a mathematical expression) as a sum of terms in an extended form.
2) to increase or grow in extent, bulk, scope; to spread out; unfold; develop.
See also → spread, → extend, → dilate.

M.E. expanden, from O.Fr. espandre "to spread, spread out," from L. expandere "to spread out, unfold, expand," from → ex- "out" + pandere "to spread, stretch," from nasalized form of PIE root *pete- "to spread," a Pers. offshoot of which is pahn "wide, broad," as below. from

Sopândan, "to stretch, to extend, open out" from so- "out," → ex-, + pân, from pan, variant of pahn "wide, large, broad, ample, extensive," from Mid.Pers. pah(a)n; Av. paθana- "broad, wide, spacious;" PIE root *pete- "to spread;" cf. L. patere "to be open," Gk. petannynai "to spread out," petalon "a leaf."
Alternatively, Sopândan "to open up, to open out," from so- "out," → ex-, + pân "open," cf. Yaghnobi pen, peyn "to open, unroll," Sogd. pyn- "to open," ultimately from Proto-Ir. *apa- + *hHai- "to chain, bind," from which Pers. gošâdan "to open, release" (Cheung 2007).

Expanded Very Large Array (EVLA)
     
EVLA

Fr.: EVLA   

A → radio interferometer array consisting of 27 25-meter diameter antennas located on the Plains of San Agustin in West-Central New Mexico. EVLA will operate at any frequency between 1.0 and 50 GHz and will have a continuum sensitivity improvement over the → VLA by factors of 5 to 20.The EVLA project is expected to be completed in 2012. See also the EVLA homepage.

expand; → very; → large; → array.

expanding Universe
  گیتی ِ سپانا، ~ سپاننده   
giti-ye sopânâ, ~ sopânande

Fr.: Univers en expansion   

The deduction based on the observational fact that the greater the → distance to a → galaxy, the greater the → redshift in its → spectral lines (→ Doppler effect). The observations strongly indicate that galaxies appear to be moving away from us with speeds proportional to their distance. This is in agreement with the overall → expansion of the → Universe.

expand; → -ing; → Universe.

expansion
  سپانش   
sopâneš (#)

Fr.: expansion   

1) General: The act or process of expanding; the state or quality of being expanded. → expansion of the Universe.
2) Math.: The process of expressing a quantity, or a quantity expressed, as a sum of a series of terms. For example the expression (2x - 1)(x + 3) can be expanded to: 2x2 + 5x - 3. See also → binomial expansion.

Noun from → expand.

expansion of the Universe
  سپانش ِ گیتی   
sopâneš-e giti (#)

Fr.: expansion de l'Univers   

The receding of galaxies from one another at a speed proportional to their separation, as inferred by Edwin Hubble from the observed Doppler shift of distant galaxies. → Hubble constant describes the local rate of the expansion.

expansion; → universe.

expansion parameter
  پارامون ِ سپانش   
pârâmun-e sopâneš

Fr.: paramètre d'expansion   

A → scale factor that relates the size of the Universe R = R(t) at time t to the size of the Universe R0 = R(t0) at time t0 by R = aR0. The expansion parameter represents the history of expansion of the Universe.

expansion; → parameter.

expectation
  بیوسش   
bayuseš

Fr.: espérance, attente   

Statistics: Same as → mathematical expectation, → expected value.

From L. expectare "to await, hope," from → ex- "thoroughly" + spectare "to look," from → specere "to look at," → -scope.

Bayusesš, verbal noun of bayusidan "to expect;" Mid.Pers. pyws- "to hope for, desire" (prefixed *pati-); O.Pers. vasiy "at will, greatly, utterly," vašna- "will, favor;" Av. vas- "to will, desire, wish, long for," vasəmi "I wish," vasna- "will, favor," ušti- "desire, wish, will," vasô, vasə "at one's will." This word is extant in several Mod.Pers. dialects, Tabari vessen "to wish, desire," Gilaki vâssan "to wish, desire," vâsti "desire," Kurd. wistin "to desire, wish," Lâri avessa "to desire," colloquial Tehrâni vâsé "for" (Mid.Pers. vasnâd "because"); cf. Skt. vaś- "to wish, want, desire," váśa- "wish, desire," vasēna "for, because;" Gk. ekon "voluntary;" PIE base *uek- "to wish."

expected value
  ارزش ِ بیوسیده   
arzeš- bayusidé

Fr.: valeur espérée   

Statistics: Same as → mathematical expectation, → expectation.

expectation; → value.

expend
  هزینیدن   
hazinidan

Fr.: dépenser   

To use up. See also → spend, → consume.

From L. expendere "to pay out, weigh out money," from → ex- "out" + pendere "to pay, weigh."

Hazinidan, back formation from haziné, → expenditure.

expenditure
  هزینه   
haziné (#)

Fr.: dépense   

1) The act of expending something, especially funds; disbursement; consumption.
2) Something that is expended; expense (Dictionary.com).

From → expend.

Mid.Pers. uzên, uzênag "expense;" ultimately from Proto-Ir. *uz-ayana- literally "going out" (cf. Awromani ziāy-/-zia- "to go out"), from uz-, → ex-, + *Hai- "to go," → efficiency.

experiment
  آزمایش   
âzmâyeš (#)

Fr.: expérience   

An act or operation for the purpose of discovering something unknown or of testing a principle, supposition. See: → Aspect experiment, → Carnal-Mlynek experiment, → Davisson-Germer experiment, → double-slit experiment, → Eratosthenes experiment, → Hafele-Keating experiment, → Hertz experiment, → Michelson-Morley experiment, → Millikan's oil-drop experiment, → Pascal's barrel experiment, → random experiment, → Stern-Gerlach experiment, → thought experiment, → toothed-wheel experiment, → Trouton-Noble experiment, → Young's experiment.

From O.Fr. experiment, from L. experimentum "a trial, test," from experiri "to test, try," from → ex- "out of" + peritus "experienced, tested."

Âzmâyeš, verbal noun of âzmudan, âzmây- "to try, experiment, test;" Mid.Pers. uzmudan, ôzmutan "to test, try, prove;" from O.Pers./Av. *uz-māy-, from uz-, → ex- + mā(y)- "to measure," Proto-Ir. *maH- "to measure;" PIE *meH- "to measure;" cf. Skt. mati "measures," matra "measure;" Gk. metra "lot, portion;" L. metri "to measure."

<< < -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 div dog Dop dou dra dua dus dwa dyn e-m ear ecl eco eff ein Ein elb ele ele ele ele Els emi emp ene enr env epi equ equ Eri est Euc eva evo exc exc exh exo exp exp ext ext f-n Fah fam fau fee Fer fib fil fin fir fix fle flu foc for for for fra fre fre fri fun fuz gal gal gal Gan gau GCN gen geo geo geo geo Gl glo gra gra gra gra gra gre gro GW1 hab hal han HAR haz hea hel hel Hen Her heu Hig Hil hol hop hor hou Hub Hum Hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind ine inf inf inf inh INP ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jos Jun K2 Kep key kin Kol lag lam Lan lar las lav lea leg len lev lig lim lin lin lin lis lob loc log lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal mar mas mas mat max mea mea mee Men mer met met met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxy pal pan par Par par par pas pea Pen per per per per per pet pha pho pho pho phy pie Pit Pla pla pla pla ple Poi pol pol pol pol pop pos pos pow pre pre pre Pre pri pri pri pro pro pro pro pro pro Pro pub pul pyr qua qua qua qua Qui rad rad rad rad rad rad ram ran rat rea rec rec rec red ref ref reg reg rel rel rem rep res res res ret rev rho Rie rim riv rol Ros rot rul S a Sah san Sat sca Sch Sch scr sec sec sec sei sel sem sep set sha she sho sid sig sil sim sin sit sky slu sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spl spr sta sta sta sta sta ste ste sti sto str str sub sub sub sug sun sup sup sup sup sur syl syn sys tal Tay tel ten ter tex the the the thi tho thu tid tim tod top tot tra tra tra tra tri tri tro tru tur twi Typ UFO ult unc uni uni uni upg ura uti val var vec vel ver ver vig vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yel you zer zod > >>