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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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<< < -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 > >>

Number of Results: 12948 Search : far
uniaxial crystal
  بلور ِ یک‌آسه   
bolur-e yek-âsé

Fr.: cristal uniaxe   

Crystal with double refraction possessing only one → optic axis.

uni-; axial adj. from → axis; → crystal.

unidentified
  نا-ایدانیده   
nâ-idânidé

Fr.: non identifié   

The attribute of someone or something whose identity is not established. → unidentified flying object; → unidentified line.

un-; → identify.

unidentified flying object (UFO)
  بر‌آخت ِ پرنده‌ی ِ نا-ایدانیده، پدیده‌ی ِ هوا-فضایی ِ نا-ایدانیده   
barâxt-e parande-ye nâ-idânidé, padide-ye havâ-fazâyi-ye nâ-idânidé

Fr.: Objet Volant Non Identifié (OVNI)   

Any flying object or phenomenon that cannot be identified by the observer.

unidentified; fly; M.E. flien; O.E. fleogan (cf. O.H.G. fliogan, O.N. flügja, M.Du. vlieghen, Ger. fliegen); → object.

Unidentified Infrared Band (UIB)
  باند ِ فروسرخ ِ نا-ایدانیده   
bând-e forusorx-e nâ-idânidé

Fr.: bande infrarouge non identifiée   

A no longer in general use name for → Aromatic Infrared Band.

unidentified; → infrared; → band.

unidentified line
  خط ِ نا-ایدانیده   
xatt-e nâ-idânidé

Fr.: raie non identifiée   

A spectral line whose origin is not clearly established. → line identification.

unidentified; → line.

unification
  یگانش   
yegâneš

Fr.: unification   

1) The process of unifying or uniting; union.
2) The state or condition of being unified (Dictionary.com).

Verbal noun of → unify.

uniform
  یکدیس، یکنواخت   
yekdis, yeknavâxt

Fr.: uniforme   

Without variations; identical, always the same in quality, degree, character, or manner.

uni- + → form.

Yekdis, from yek, → uni-, + dis, → form; yeknavâxt, literally "with one rhythm," from yek, → one, + navâxt "rhythm," from navâxtan, navâzidan "to play an instrument; to gratify," navâ "music, song, melody" (Mid.Pers. nw'c "to treat kindly, honour," niwag "music, melody;" Proto-Iranian *ni-uac-, from ni- "down; into," → ni- (PIE), + *uac- "to speak, treat kindly").

uniform circular motion
  جنبش ِ دایره‌ای ِ یکدیس، ~ ~ یکنواخت   
jonbeš-e dâyereyi-ye yekdis, ~ ~ yeknavâxt

Fr.: mouvement circulaire uniforme   

The motion of an object around a fixed point at a constant angular speed, and at constant radius.

uniform; → circular; → motion.

uniform field
  میدان ِ یکدیس، ~ ِ یکنواخت   
meydân-e yekdis, ~ yeknavâxt

Fr.: champ uniforme   

A field that at a given instant has the same value at all points within a specified region of interest.

uniform; field.

uniform magnetic field
  میدان ِ مغناتیسی ِ یکدیس   
meydân-e meqnâtisi-ye yekdis

Fr.: champ magnétique uniforme   

A → magnetic field whose direction does not change and whose strength is constant at every point.

uniform; → magnetic; → field.

uniform motion
  جنبش ِ یکدیس، ~ ِ یکنواخت   
jonbeš-e yekdis, ~ yeknavâxt

Fr.: mouvement uniforme   

Motion at a constant → velocity. The state of rest is a special case of uniform motion. → accelerated motion; → inertial motion.

uniform; motion.

uniformitarian
  یکدیسوار   
yekdisvâr

Fr.: uniformitaire   

1) Of, characterized by, or conforming to → uniformity.
2) Of or relating to → uniformitarianism.

uniformity + -arian.

uniformitarianism
  یکدیسوارباوری   
yekdisvârbâvari

Fr.: uniformitarisme   

The doctrine whereby geologic processes (→ erosion, → deposition, → compaction, and → uplift) observed at Earth's surface now are the same that have shaped Earth's landscape over long periods of time in the past. The term uniformitarianism was first used in 1832 by William Whewell, to present an alternative explanation for the origin of the Earth. The prevailing view at that time was that the Earth was created through supernatural means and had been affected by a series of catastrophic events such as the biblical Flood. This theory is called → catastrophism. The ideas behind uniformitarianism originated with the work of Scottish geologist James Hutton. In 1785, Hutton presented at the meetings of the Royal Society of Edinburgh that the Earth had a long history and that this history could be interpreted in terms of processes currently observed. For example, he suggested that deep soil profiles were formed by the weathering of bedrock over thousands of years. He also suggested that supernatural theories were not needed to explain the geologic history of the Earth (PhysicalGeography.net).

uniformitarian; → -ism.

uniformity
  یکدیسواری، یکدیسیگی   
yekdisvâri, yekdisigi

Fr.: uniformité   

The state or quality of being uniform.

uniform; → -ity.

unify
  یگانستن، یگانیدن   
yegânestan (#), yegânidan (#)

Fr.: unifier   

To make or become a single unit or entity. → grand unified theory

M.Fr. unifier, from L.L. unificare "to make one," from L. uni-, → one, + facere "to make" (cf. Fr. faire, Sp. hacer), from PIE base *dhe- "to put, to do" (cognate with Mod.Pers. dâdan "to give;" O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives; puts;" Skt. dadáti "puts, places;" Hitt. dai- "to place;" Gk. tithenai "to put, set, place;" Lith. deti "to put;" Czech diti, Pol. dziac', Rus. det' "to hide," delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do").

Yegânestan, yegânidan "to make one," infinitive from yek, → one.

union
  یکایش   
yekâyeš

Fr.: union   

General: The act of uniting two or more things.
A number of persons, organizations, states, etc., joined or associated together for some common purpose, e.g. → International Astronomical Union (IAU).
Math.: A set containing all the elements of two or more sets being combined. It is represented by ∪.

M.E. from O.Fr. union from L.L. unionem (nominative unio) "oneness, unity," from unus, → one, cognate with Pers. yek, as below.

Yekâyeš, from yek, → one, + -ây- epenthetic vowel, + -eš verbal noun suffix, → -tion.

unique
  یکتا   
yektâ (#)

Fr.: unique   

Existing as the only one or as the sole example.
Limited to a single outcome or result. → uniqueness theorem.

From Fr. unique, from L. unicus "single, sole," from unus, → one.

Yektâ "unique," from yek, → one, + "fold, plait, ply; piece, part" (Mid.Pers. tâg "piece, part").

uniqueness
  یکتایی   
yektâyi (#)

Fr.: unicité   

The state or condition of being → unique.

Noun from → unique.

uniqueness theorem
  فربین ِ یکتایی   
farbin-e yektâyi

Fr.: théorème d'unicité   

1) Physics: A → potential that satisfies both → Poisson's equation and the → boundary conditions pertinent to a particular field is the only possible potential.
2) Math.: If two → continuous functions φ(t) and ψ(t) have one and the same → Laplace transform F(p), then these functions are identically equal.
3) Astro.: A → black hole can only be characterized by its → mass, → electric charge, and → angular momentum. See also → no hair theorem.

uniqueness; → theorem.

unit
  یکا، یکان   
yekâ (#), yekân (#)

Fr.: unité   

A quantity or dimension adopted as a standard of measurement.
Math.: The lowest positive natural number.
The first digit to the left of the decimal point in decimal notation, representing a whole number less than ten.
An element in a ring that has a multiplicative inverse.

Back formation from → unity.

Yekâ, yekân, from yek, → one.

<< < -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 > >>