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 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc coh col col col Com com com com com com com com Com con 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 Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp 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 fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag 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 mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>

Number of Results: 13116 Search : far
stable
  پایدار   
pâydâr (#)

Fr.: stable   

Physics: 1) Having the ability to react to a disturbing force by maintaining or regaining position or condition.
2) Incapable of becoming a different isotope or element by radioactive decay.

M.E., from O.Fr. estable, from L. stabilis "firm, steadfast," literally "able to stand," from stem of stare "to stand;" cognate with Pers. 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").

Pâydâr "stable, firm" literally "having feet," from pâ(y) "foot; step" (Mid.Pers. pâd, pây; Av. pad- "foot;" cf. Skt. pat; Gk. pos, genitive podos; L. pes, genitive pedis; P.Gmc. *fot; E. foot; Ger. Fuss; Fr. pied; PIE *pod-/*ped-) + dâr present stem of dâštan "to have, hold, maintain, possess" (Mid.Pers. dâštan; O.Pers./Av. root dar- "to hold, keep back, maintain, keep in mind;" cf. Skt. dhr-, dharma- "law;" Gk. thronos "elevated seat, throne;" L. firmus "firm, stable;" Lith. daryti "to make;" PIE *dher- "to hold, support").

stable equilibrium
  ترازمندی ِ پایدار   
tarâzmandi-ye pâydâr (#)

Fr.: équilibre stable   

An equilibrium state of a system in which if a small perturbation away from equilibrium is applied, the system will return to its equilibrium state. An example is a pendulum hanging straight down. If it is pushed slightly, it will experience a force back toward the equilibrium position. It may oscillate around the equilibrium position for a while, but it will finally regain its equilibrium position. → unstable equilibrium.

stable; → equilibrium.

stable nuclide
  هسته‌وار ِ پایدار   
hastevâr-e pâydâr

Fr.: nucléide stable   

A nuclide that is not → radioactive and therefore does not spontaneously undergo → radioactive decay.

stable; → nuclide.

staff
  ۱) چوبدست؛ ۲) استب   
1) cubadt; 2) estab

Fr.: 1) bâton; 2) personnel   

1) A long stick used to help in walking. → Sharafeddin's staff.
2) A body of persons, as employees, charged with carrying out the work of an establishment or executing some undertaking. → staff astronomer.

M.E. staf; O.E. stæf "walking stick, rod used as a weapon, pastoral staff;" sense of "group of military officers that assists a commander" attested from 1702; cf. O.N. stafr, M.Du. staf, O.H.G. stab, Ger. Stab, M.Du. stapel "pillar, foundation;" PIE base *stebh- "to support, place firmly on, fasten; post, stem;" cognate with Av. stabra- "strong, firm" and other Iranian words, as below.

1) Cubdast "hand stick," from cub "staff, stick," Mid.Pers. côp "wood, stick" + dast, → hand.
2) Estab, from Av. stabra- "strong, firm;" O.Pers. stamb- "to revolt;" Mid.Pers. stabr "strong, firm;" Mod.Pers. ustâm "column" [Steingass], Lori esi "tent pole," setabr "strong, big, thick, dense," setanbé "strong, powerful," estam, setam "oppression;" cf. Skt. stabh- "support," stambh- "to support, fix firmly;" Gk. stephein "to tie around, encircle," astemphes "firm, rigid;" Lith. stebas "staff, pillar."

staff astronomer
  اخترشناس ِ استب   
axtaršenâs-e estab

Fr.: astronome résident   

A professional astronomer who works within a specified observatory or research group.

staff; → astronomer.

stage
  گامه   
gâmé (#)

Fr.: étape   

A single step or phase in an ongoing process.

M.E., from O.Fr. estage "a story or floor of a building, stage for performance," from V.L. *staticum "a place for standing," from L. statum, p.p. of stare "to stand."

Gâmé, from gâm "step, pace" (related to âmadan "to come"); Mid.Pers. gâm "step, stride, pace;" O.Pers. gam- "to come; to go;" Av. gam- "to come; to go," jamaiti "goes;" cf. Skt. gamati "goes;" Gk. bainein "to go, walk, step;" L. venire "to come;" Tocharian A käm- "to come;" O.H.G. queman "to come;" E. come; PIE stem *gwem- "to go, come."

stagnation
  ناروانی   
nâravâni

Fr.: stagnation   

The state or condition of not flowing or running. → stagnation point, → stagnation pressure.

L. stagnatum, stagnatus, p.p. of stagnare "to stagnate," from stagnatum "standing water," from PIE root *stag- "to seep drip."

Nâravâni, literally "not flowing," from nâ- negation prefix, → un-, + ravân "flowing, running," pr.p. of raftan "to go, walk; to flow;" (Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- "to go; to attack").

stagnation point
  نقطه‌ی ِ ناروانی   
noqte-ye nâravâni

Fr.: point de stagnation   

A point where the → flow  → velocity is → zero. For example a point around an obstacle where a → flow tube splits into two portions.

stagnation; → point.

stagnation pressure
  فشار ِ ناروانی   
fešâr-e nâravâni

Fr.: pression de stagnation   

The sum of → static pressure and → dynamic pressure in the → Bernoulli equation.

stagnation; → pressure.

stallion
  نریان   
naryân (#)

Fr.: étalon   

An uncastrated adult male horse, especially one used for breeding.

M.E. stalon, from O.Fr. estalon, "uncastrated male horse," cognate with O.H.G. stal "stable," cf. O.H.G. stall "stand, place, stable, stall," Ger. Stall "stable," Stelle "place"), from PIE root *stel- "to put, stand," with derivatives referring to a standing object or place; akin to Pers. istâdan "to stand," → station.

Nariyân, from nar "male," → masculine.

stand
  ایستادن   
istâdan (#)

Fr.: être ou se tenir debout   

To have or maintain an upright position, supported by one's feet; rise to one's feet (OxfordDictionaries.com).

M.E. standen, from O.En. standan "occupy a place; stand firm; stay, be, exist; oppose, resist attack; stand up, be on one's feet;" cognate with O.Norse standa, O.Saxon and Gothic standan, O.H.G. stantan, Du. staan, Ger. stehen, cognate with Pers. istâdan, as below.

Istâdan "to stand," from 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."

standard
  استانده   
estândé (#)

Fr.: standard   

Any set of conditions that describe the normal, desired, or ideal state of something, and that serves a basis for representing or evaluating actual examples of this thing.

M.E., from O.Fr. estandart "banner, standard," probably from Frankish *standord; cf. Ger. Standort "standing-point," from standan "to stand," cognate with Pers. istâdan, as below, with the second component conformed to -ard.

Estândé, literally "made stand, fixed," p.p. istândan transitive verb of istâdan, "to → stand."

standard atmosphere
  هواسپهر ِ استانده، جوّ ِ ~   
havâsepehr-e estândé (#), javv-e ~ (#)

Fr.: atmosphère standard   

A hypothetical vertical distribution of atmospheric temperature, pressure, and density that, by international agreement, is taken to be representative of the atmosphere for purposes of pressure altimeter calibrations, aircraft performance calculations, aircraft and missile design, ballistic tables, etc.

standard; → atmosphere.

standard candle
  شمع ِ استانده   
šam'-e estândé

Fr.: chandelle standard   

An astronomical object, belonging to some class, that has a known luminosity. In principle, by comparing the known luminosity to the observed brightness, the distance to the object can be derived. The four major primary distance indicators are Cepheids, supernovae, novae, and RR Lyrae variables. The secondary distance indicators include H II regions, globular clusters, brightest red and blue stars. → primary calibrator; → secondary calibrator.

standard; → candle.

standard cosmology
  کیهان‌شناسی ِ استانده   
keyhânšenâsi-ye estândé

Fr.: cosmologie standard   

The conventional → Big Bang model, which is based on two assumptions: the → cosmological principle of homogeneity and isotropy leading to the → Robertson-Walker metric, and → Einstein's field equations of general relativity along with familiar properties of matter. This model is a remarkably successful operating hypothesis describing the evolution of the Universe from 1/100 second after the initial event through to the present day. It provides explanations for several basic problems such as: → Hubble's law of recession of galaxies, interpreted in terms of the expansion of the Universe; the abundances of the → light elements, in excellent agreement with the predictions of → primordial nucleosynthesis; and the thermal spectrum and angular isotropy of the → cosmic microwave background (CMB) radiation, as expected from a hot, dense early phase of expansion. For a non-standard model, see → ekpyrotic Universe.

standard; → cosmology.

standard deviation
  کژرفت ِ استانده   
kažraft-e estândé

Fr.: écart-type   

The most widely used measure of dispersion of a frequency distribution. It is equal to the positive square root of the → variance. Same as → standard error. Not to be confused with the → root mean square error.

standard; → deviation.

standard epoch
  زیمه‌ی ِ استانده   
zime-ye estândé

Fr.: époque de référence   

A particular date and time that specifies the reference system to which celestial coordinates are referred. From 1984 the → Julian year is used, as denoted by the prefix J, e.g. J2000.0.

standard; → epoch.

standard error
  ایرنگ ِ استانده   
irang-e estândé

Fr.: erreur type   

Same as → standard deviation.

standard; → error.

standard model
  مدل ِ استانده، ترزال ِ ~   
model-e estândé, tarzâl-e ~

Fr.: modèle standard   

The accepted but possibly incomplete theoretical framework which usually describes a set of phenomena. For example, the model that describes the origin of the Universe, or the model concerned with the processes in the interior of the Sun.

standard; → model.

standard model of particle physics
  مدل ِ استانده‌ی ِ فیزیک ِ ذره‌ای   
model-e estânde-ye fizik-e zarre-yi

Fr.: modèle standard de la physique des particules   

The theory developed since the 1970s, which is based on the theories and discoveries since the 1930s, and aims at explaining the fundamental structure of matter. According to the standard model, everything in the universe is made from a few basic building blocks called fundamental particles, governed by four fundamental forces. The particles occur in two basic types, called quarks and leptons. Three of the four fundamental forces (except gravity) and their carrier particles are included in the Standard Model. The Standard Model has successfully explained almost all experimental results and precisely predicted a wide variety of phenomena. Over time and through many experiments, the Standard Model has become established as a well-tested physics theory.

standard; → model; → particle; → physics.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc coh col col col Com com com com com com com com Com con 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 Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp 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 fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag 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 mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>