An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < -es -iv -ti 217 a- abe abs abs acc acc ach act act ada adi adv aff agg 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 bee Bes bi- bif bin bin bio bis bla bli blu Boe Bol bor bou bra bri Bro bum CAI cal Can cap car car cat cat CCD Cel cen CGS cha cha che che chr cir cir civ cla clo clo CMB 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 cov cra cri cro cry cum cur cyc d'A dar dat DC dea dec dec dec def def deh Del den dep des det dev dia dif dif dif dim dip dir dis dis dis dis dis div dom dou dou dri dup dus dyn dyn ear eas ecl Edd eff Ein Ekm ele ele ele ele ell emb emi enc ene ent eph equ equ equ eru eth eup eve EX exc exe exi exo exp ext ext ext fac 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 gol gra gra gra gra Gre Gre gui H a haf Hal har har He- hea hel Hel her Her hie hig his hom hor hot Hub Hug hur hyd hyd hyl hyp ice ide ima imp imp imp inc ind ind ine inf inf Inf inj InS ins int int int int int int int int inv inv ion iro Isl iso iso Jac jet jud jur Kel Kep kil kly L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat mea mec mem mer mes met met met mic mid mil min Mir Miz mod mol mon moo MOS mul mul mut nai nas nat neb neg Neu neu New New Nih noi non non non nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove oxi pac Pal par par Par par pas Pau Pel per per per per per per pha phi pho pho pho phy pip Pla pla pla pla pla Plu Poi pol pol pol pop pos pos pot Pra pre pre pre Pri pri pri pro pro pro pro pro pro pro Pto pul puz qua qua qua qua qui rad rad rad rad rad rad rai ran Ras Ray rea rec rec rec red red ref reg reg rel rel rel rep res res res res rev rhe Rie Rig Rit roe Ros rot Ruf Ryd Sag sam sat sca sca Sch Sco sec sec sec seg sel sem sen set sha SHB sho sib sie sil sim sin sit sky slo sno sod sol sol sol sol sor sou Spa spa spe spe spe sph spi Spi spr sta sta sta sta sta ste ste Ste sto str str sub sub sub suf sun sup sup sup sup sur swo syn sys tak Tay Tel ten ter tet the the the thi Tho thu tid tim toa top tot tra tra tra tra tri tri tro Tru tur twi Typ UBV ult unb uni uni uni up ura uti val var vec Vel ver ver vig vir vis VLT vol wad was wav wav wea wei Whe Wie win WN5 Wol X-r yea You zer zod > >>

Number of Results: 12929 Search : far
statistical population
  پرینش ِ آماری   
porineš-e âmâri

Fr.: population statistique   

Any collection of individuals or items from which → samples are drawn. See also → finite population, → infinite population.

statistical; → population.

statistical thermodynamics
  گرماتوانیک ِ آماری   
garmâtavânik-e âmâri

Fr.: thermodynamique statistique   

Same as → statistical mechanics.

statistical; → thermodynamics.

statistical weight
  وزن ِ آماری   
vazn-e âmâri

Fr.: poids statistique   

1) Statistics: A number assigned to each value or range of values of a given quantity, giving the number of times this value or range of values is found to be observed.
2) Statistical mechanics: A multiplicative factor in the expression for the probability of finding a system in a given quantum state. Usually the number of degenerate substates contained in the state.

statistical; → weight.

statistics
  آمار   
âmâr (#)

Fr.: statistique   

A branch of applied mathematics that deals with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters.

From Ger. Statistik "political science," from Mod.L. statisticus (collegium) "state affairs," from It. statista "person skilled in statecraft," from stato "state," ultimately from L. status "position, form of government;" cognate with Pers. ist-, istâdan "to stand" (Mid.Pers. êstâtan; O.Pers./Av. sta- "to stand, stand still; set;" Av. hištaiti; cf. Skt. sthâ- "to stand;" Gk. histemi "put, place, weigh," stasis "a standing still;" L. stare "to stand;" Lith. statau "place;" Goth. standan; PIE base *sta- "to stand").

Âmâr "computation, arithmetic; statistics," from âmârdan "to reckon, to calculate," related to ošmârdan, šomârdan, šomordan "to count, to calculate," mar, mâr- "count, reckon, measure," bimar "countless," nahmâr "great, large, big;" Mid.Pers. âmâr "calculating, reckoning;" Av. base mar- "to have in mind, remember, recall," hišmar-; cf. Skt. smr-, smarati "to remember, he remembers," L. memor, memoria, Gk. mermera "care," martyr "witness."

stature
  بشن، قد   
bašn (#), qad (#)

Fr.: stature   

1) The natural height of a human or animal in an upright position.
2) An achieved level; status (The FreeDictionary.com).

M.E., from from O.Fr. stature, estature "build, structure," from L. statura "height, size of body, size," from PIE root *sta- "to stand, make or be firm," cf. Pers. ist-, istâdan "to stand," → opposition.

Bašn "stature, height; the body;" Mid.Pers. bašn "the top;" O.Pers. baršan- "height," variant borz "height, magnitude" (it occurs also in the name of the mountain chain Alborz), related to boland "high," bâlâ "up, above, high, elevated, height," berg "mountain, hill;" Mid.Pers. buland "high;" Av. barəz- "high, mount," barezan- "height;" cf. Skt. bhrant- "high;" L. fortis "strong" (Fr. & E. force); O.E. burg, burh "castle, fortified place;" Ger. Burg "castle," Goth. baurgs "city," E. burg, borough, Fr. bourgeois, bourgeoisie, faubourg); PIE base *bhergh- "high."

status
  استاته   
estâté

Fr.: status   

1) The position of an individual in relation to another or others, especially in regard to social or professional standing.
2) State or condition of affairs (Dictionary.com).

From L. status "condition, position, state, attitude" from p.p. stem of stare "to stand," from PIE *ste-tu-, from root *sta- "to stand," → state., + -tus suffix of action.

Estâté, from estat, → state, + nuance suffix .

steady flow
  تچان ِ پایا   
tacân-e pâyâ

Fr.: écoulement constant, ~ stationnaire   

A flow in which the characterizing conditions, such as → streamlines or velocity at any given point, do not change with time.

steady; → flow.

Tacân, → flow; pâyâ "steady, constant," from pâyidan "to stand firm, to be constant, steady," from Mid.Pers. pattây-, pattutan "to last, endure, stay."

steady state theory
  نگره‌ی ِ حالت ِ پایا   
negare-ye hâlat-e pâyâ

Fr.: théorie de l'état stationnaire   

A → cosmological model according to which the → Universe has no beginning and no end and maintains the same mean density, in spite of its observed expansion, by the continual creation of matter throughout all space. The theory was first put forward by Sir James Jeans in about 1920 and again in revised form in 1948 by Hermann Bondi and Thomas Gold. It was further developed by Sir Fred Hoyle to deal with problems that had arisen in connection with the alternative → Big Bang model. Observations since the 1950s have produced much evidence contradictory to the steady state theory and supportive of the Big Bang model. More specifically, the steady state theory attributed the → cosmic microwave background to → thermal radiation from → dust clouds, but this cannot account for a single → blackbody spectrum. Moreover, the steady state theory lacked a plausible mechanism for the creation of matter in space. See also → perfect cosmological principle.

steady; → state; → theory.

steam
  بخار   
boxâr (#)

Fr.: vapeur   

The vapor into which water is changed when boiled.

From M.E. steme, O.E. steam; cognate with Du. stoom, of unknown origin.

Boxâr, → vapor.

steam engine
  ماشین ِ بخار   
mâšin-e boxâr (#)

Fr.: machine à vapeur   

An engine in which the energy of hot → steam is converted into → mechanical power, especially an engine in which the force of expanding steam is used to drive one or more → pistons. The source of the steam is typically external to the part of the machine that converts the steam energy into → mechanical energy (Dictionary.com).

steam; → engine.

steel
  پولاد   
pulâd (#)

Fr.: acier   

A strong → alloy of → iron containing up to 1.5 percent → carbon along with small amounts of other → chemical elements such as → manganese, → chromium, → nickel, and so forth.

O.E. style; cf. O.S. stehli, O.N., M.L.G. stal, Dan. staal, Swed. stål, M.Du. stael, Du. staal, O.H.G. stahal, Ger. Stahl.

Pulâd, variant fulâd, from Mid.Pers. pôlâwad, pôlâvat, loaned in Arm. polopat, polovat, maybe related to Skt. pavīra- "a weapon with metallic point, a spear, a lance."

steelyard
  قپان   
qapân (#)

Fr.: balance romaine   

A balance used for weighing loads that has a two beams of different lengths. The shorter beam has a hook or the like for holding the object to be weighed and the longer one supports a movable counterpoise that slides to attain a balance.

steel; yard, from M.E. yard(e), O.E. gerd "straight twig;" cognate with Du. gard, Ger. Gerte "rod."

Qapân, from kapân "a large balance with one scale, being kept in equilibrium by a weight on the other end of the beam, a lever balance" (Steingass).

Stefan-Boltzmann constant
  پایای ِ اشتفان-بولتسمن   
pâyâ-ye Stefan-Boltzmann

Fr.: constante de Stefan-Boltzmann   

The constant of proportionality present in the → Stefan-Boltzmann law. It is equal to σ = 5.670 × 10-8 W m-2 K-4 or 5.670 × 10-5 erg cm-2 s-1 K-4.

Stefan-Boltzmann law; → constant.

Stefan-Boltzmann law
  قانون ِ اشتفان-بولتسمن   
qânun-e Stefan-Boltzmann

Fr.: loi de Stefan-Boltzmann   

The flux of radiation from a blackbody is proportional to the fourth power of its absolute temperature: L = 4πR2σT4. Also known as Stefan's law.

Ludwig Eduard Boltzmann (1844-1906), an Austrian physicist, who made important contributions in the fields of statistical mechanics and statistical thermodynamics and Josef Stefan (1835-1893), an Austrian physicist; → law.

Steiner's theorem
  فربین ِ اشتاینر   
farbin-e Steiner

Fr.: théorème de Steiner   

The → moment of inertia of a body about an arbitrary axis x' is equal to the sum of its moment of inertia about axis x, passing through the center of mass of the body and parallel to axis x', and the product of the mass M of the body by the square of the distance d between axes x and x': Ix' = Ix + Md2. Same as → parallel axis theorem.

Named after Jakop Steiner (1796-1863), a Swiss mathematician who derived this statement; → theorem.

Steins
  ۲۸۶۷ اشتاینس   
2867 Šteins

Fr.: 2867 Šteins   

A small → main belt  → asteroid of size 5.9 x 4 km, discovered in 1969 by N. S. Chernykh. It was visited by the → Rosetta space probe in 2008.

Named after Karlis Šteins (1911-1983), a Latvian and Soviet astronomer.

stellar aberration
  بیراهش ِ ستاره‌ای   
birâheš-e setâre-yi

Fr.: aberration stellaire   

Same as → aberration of starlight .

stellar; → aberratio.

stellar association
  آهزش ِ ستاره‌ای   
âhazeš-e setâre-yi

Fr.: association stellaire   

1) A large, loose grouping of 10 to 1000 stars that are of similar spectral type and share a common origin. The members move together through space, but have become gravitationally → unbound. Stellar associations are primarily identified by their common movement vectors and ages. → OB association; → T association; → R association.
2) An → unbound stellar agglomeration for which the age of the stars is smaller than the → crossing time (Giels & Portegies Zwart, 2010, MNRAS Letters, astro-ph/1010.1720). See also → star cluster.

The concept of stellar association was first introduced by Viktor A. Ambartsumian (1908-1996), Armenian astrophysicist (1947, Stellar Evolution and Astrophysics, Armenian Acad. of Sci.; German translation, Abhandl. Sowjetischen Astron. Ser. 1. 33, 1951). → stellar; → association.

stellar astronomy
  اخترشناسی ِ ستاره‌ای   
axtaršenâsi-ye setâreyi (#)

Fr.: astronomie stellaire   

The branch of astronomy that deals with the study of stars, their physical properties, formation, and evolution. Same as → stellar astrophysics and → stellar physics.

stellar; → astronomy.

stellar astrophysics
  اخترفیزیک ِ ستاره‌ای   
axtarfizik-e setâre-yi

Fr.: astrophysique stellaire   

The field of → astrophysics concerned with the study of the physical characteristics of stars, more specifically their → internal structure, physical processes taking place in their interiors, atmospheres, → stellar winds, → mass loss, interaction with the → interstellar medium, as well as the physical laws governing → star formation. Same as → stellar physics and → stellar astronomy.

stellar; → astrophysics.

<< < -es -iv -ti 217 a- abe abs abs acc acc ach act act ada adi adv aff agg 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 bee Bes bi- bif bin bin bio bis bla bli blu Boe Bol bor bou bra bri Bro bum CAI cal Can cap car car cat cat CCD Cel cen CGS cha cha che che chr cir cir civ cla clo clo CMB 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 cov cra cri cro cry cum cur cyc d'A dar dat DC dea dec dec dec def def deh Del den dep des det dev dia dif dif dif dim dip dir dis dis dis dis dis div dom dou dou dri dup dus dyn dyn ear eas ecl Edd eff Ein Ekm ele ele ele ele ell emb emi enc ene ent eph equ equ equ eru eth eup eve EX exc exe exi exo exp ext ext ext fac 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 gol gra gra gra gra Gre Gre gui H a haf Hal har har He- hea hel Hel her Her hie hig his hom hor hot Hub Hug hur hyd hyd hyl hyp ice ide ima imp imp imp inc ind ind ine inf inf Inf inj InS ins int int int int int int int int inv inv ion iro Isl iso iso Jac jet jud jur Kel Kep kil kly L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat mea mec mem mer mes met met met mic mid mil min Mir Miz mod mol mon moo MOS mul mul mut nai nas nat neb neg Neu neu New New Nih noi non non non nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove oxi pac Pal par par Par par pas Pau Pel per per per per per per pha phi pho pho pho phy pip Pla pla pla pla pla Plu Poi pol pol pol pop pos pos pot Pra pre pre pre Pri pri pri pro pro pro pro pro pro pro Pto pul puz qua qua qua qua qui rad rad rad rad rad rad rai ran Ras Ray rea rec rec rec red red ref reg reg rel rel rel rep res res res res rev rhe Rie Rig Rit roe Ros rot Ruf Ryd Sag sam sat sca sca Sch Sco sec sec sec seg sel sem sen set sha SHB sho sib sie sil sim sin sit sky slo sno sod sol sol sol sol sor sou Spa spa spe spe spe sph spi Spi spr sta sta sta sta sta ste ste Ste sto str str sub sub sub suf sun sup sup sup sup sur swo syn sys tak Tay Tel ten ter tet the the the thi Tho thu tid tim toa top tot tra tra tra tra tri tri tro Tru tur twi Typ UBV ult unb uni uni uni up ura uti val var vec Vel ver ver vig vir vis VLT vol wad was wav wav wea wei Whe Wie win WN5 Wol X-r yea You zer zod > >>