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 acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arb are ari art ass ast ast ast Atl ato ato Aug aut awa azi bac bal Bar Bar Bay bea Bep Bet BIC bij bin bio bir bla bla blu blu bol Boo bou Bq bre bri bub B[e cal cal can car car Cas cat cau cel cen Cer cha cha cha che chi CI cir cir cla cle clo clu co- cob 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 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 deu dia dif dif dif dim dip Dir dis dis dis dis dis div dom dos dou dri Dum dus dyn dyn ear eas ecl Edd eff Ein eje ele ele ele ele eli emb emi Enc ene ens eph epo equ equ eru eth Eul eve evo exc exc exi exo exp exp ext ext Fab fai Fan fea fem fer fie fil fir fir fla flo flu foc For for fos fra fre fre fro fun g m Gal gal gal gas gau gel gen geo geo geo gho gla gno gra gra gra gra Gre Gre gro gyr had hal har Har HD hea hel hel Her Her Hic hig hip hol hor hos hov Hub hun hyd hyd Hyd hyp IC ide ill ima imp imp inc inc ind ind inf 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 Kle Kui Lag lam Lap Lar lat law lea len lep Lib lig lim lin lin Lio lit loc LOF lon Lor low lum lun Lup Lyo mac mag mag mag mag mag mai man Mar mas mas mat Max mea mec Mei Mer 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 oxi pai pan par par par par pas pea pen per per per per Per pet pha Pho pho pho pho Pic Pis Pla pla pla pla Ple poa pol pol pol pol pop pos pos pow 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 rar Ray rea Rea rec rec red red ref ref reg rel rel rel rep res res res res ret Rhe rid rig ris Roe Ros rot rub rut Sag 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 sol sou sou spa spe spe spe spe sph spi spl spu sta sta sta sta sta ste ste sti sto str Str sub sub sub sul sup sup sup sup sur sus sym syn sys Tam Tay tel ten Ter Tha the the the thi thr tib tid tim tok Tor tot tra tra tra tra Tri tri tro tru tur twi Typ ufo ult unc uni uni uni upl ura uti val var vec vel ver ver vil vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yea You zer zod > >>

Number of Results: 13009 Search : far
vector function
  کریای ِ برداری   
karyâ-ye bordâri

Fr.: fonction vectorielle   

A function whose value at each point is n-dimensional, as compared to a scalar function, whose value is one-dimensional.

vector; → function.

vector meson
  مسون ِ برداری   
mesoon-e bordâri

Fr.: meson vectoriel   

Any particle of unit spin, such as the W boson, the photon, or the rho meson.

vector; → meson.

vector perturbation
  پرتورش ِ برداری   
partureš-e bordâri

Fr.: perturbation vectorielle   

The perturbation in the → primordial Universe plasma caused by → vorticity. These perturbations cause → Doppler shifts that result in → quadrupole anisotropy.

vector; → perturbation.

vector product
  فر‌آورد ِ برداری   
farâvard-e bordâri

Fr.: produit vectoriel   

Of two vectors, a vector whose direction is perpendicular to the plane containing the two initial vectors and whose magnitude is the product of the magnitudes of these vectors and the sine of the angle between them: A x B = C, C = |AB sin α|. The direction of C is given by the → right-hand screw rule. Same as → cross product. See also → scalar product.

vector; → product.

vector space
  فضای ِ برداری   
fazâ-ye bordâri (#)

Fr.: espace vectoriel   

A system of mathematical objects consisting of a set of (muultidimensional) vectors associated with a set of (one-dimensional) scalars, such that vectors can be added together and vectors can be multiplied by scalars while preserving the ordinary arithmetic properties (associativity, commutativity, distributivity, and so forth).

vector; → space.

Vega (α Lyr)
  واقع، نسر ِ واقع   
Vâqe', Nasr-e Vaqe' (#)

Fr.: Véga   

The brightest star in the constellation → Lyra and the 5th brightest star in the sky. It is an A type → main sequence star of visual magnitude 0.03. Vega is also one of the closer stars to the Earth, lying just 25.0 light-years away. Vega's axis of rotation is nearly pointing at the Earth, therefore it is viewed pole-on. Fast rotation has flattened Vega at its poles, turning it from a sphere into an oblate spheroid. The polar diameter of Vega is 2.26 times that of the Sun, and its equatorial diameter 2.75 solar. The poles are therefore hotter (10,150 K) than the equator (7,950 K).

Vega, from Ar. al-Waqi' contraction of an-Nasr al-Waqi' (النسر‌الواقع) "swooping eagle," from an-Nasr "eagle, vulture" + al-Waqi' "falling, swooping."

vegetable
  ۱) سبزیجات؛ ۲) گیاهی   
1) sabzijât; 2) giyâhi

Fr.: légume;   

1) Any of various herbaceous plants having parts that are used as food, such as peas, beans, cabbage, potatoes, cauliflower, and onions.
2) Botany: Of, relating to, characteristic of, derived from, or consisting of plants or plant material (e.g. vegetable oils) (TheFreeDictionary.com).

vegetate; → -able.

1) Sabzijât "class or category of greens," from sabzi, → green, + -jât a suffix denoting class, group, or division of things.
2) Giyâhi, related to giyâh, → plant.

vegetal
  گیاهی   
giyâhi (#)

Fr.: végétal   

Of, relating to, or characteristic of plants.

vegetate; → -al.

vegetate
  گیاهیدن   
giyâhidan

Fr.: végéter   

1) To grow or sprout as a plant by nutriment imbibed through roots and leaves.
2) To lead a passive life without much physical, mental, or social activity.

Ultimately from L. vegetatus, p.p. of vegetare "to enliven, to animate," from vegetus "vigorous, enlivened, active," from vegere "to be alive, active;" akin to Skt. vaja- "force, strength;" PIE root *weg- "to be strong, be lively."

Giyâhidan, infinitive forum giyâh, → plant.

vegetation
  گیاهش   
giyâheš

Fr.: végétation   

1) All the plants or plant life of a place.
2) (Botany) Plant life as a whole, especially the plant life of a particular region.
3) The act or process of vegetating.

Verbal noun from → vegetate.

vegetative
  گیاهوار   
giyâhvâr

Fr.: végétatif   

1) Of, relating to, or characteristic of plants or their growth.
2) Noting the parts of a plant not specialized for reproduction (TheFreeDictionary.com).

vegetate; → -ive.

Giyâhvâr, from giyâh, → plant, + -vâr suffix denoting "resembling, like," → -oid.

veil
  واشامه   
vâšâmé (#)

Fr.: voile   

1) A piece of opaque or transparent cloth worn by women as a covering for the head and shoulders.
2) Something that covers, screens, or conceals.

M.E. veile; O.Fr. voile "a head-covering" (also "sail"), from L. vela, plural of velum "curtain, covering; sail."

Vâšâmé "veil," variants vâšâm, bâšâmé, bâšâm, from Mid.Pers. *varšâmak (loaned in Arm. varšamak "veil, scarf"); cf. Sogd. wâršâmé "veil;" from Proto-Ir. *varšāmaka-, from *varšām-, from *varš-, from var- "to cover;" cf. Av. var- "to cover, conceal;" Skt. var- "to cover;" Mid.Pers. warr "garment," prefixed uzvâr-, uzvârdan "to uncover, show, apprehend, interprete;" Mod.Pers. šalvâr "trousers" (literally "thigh cover;" the first component šal "thigh," šelang "thigh; step, distance between feet when walking," cognate with Gk. skelos "leg"); Kurd. (Soriani) barg "cover; clothes," da barg girtin "to wrap in a cover."

Veil Nebula
  میغ ِ واشامه   
miq-e vâšâmé

Fr.: Nébuleuse du Voile   

A part of the → Cygnus loop, an old → supernova remnant.

veil; → nebula.

veiling
  واشامش   
vâšâmeš

Fr.: voilage   

1) General: An act of covering with or as if with a veil.
2) A weakening of the → spectral lines of a star that occurs when the spectral lines are filled in by → continuum emission or light from a → companion star.

Verbal noun from veil (v.).

vein
  سیاهرگ   
siyâhrag (#)

Fr.: veine   

Any of the tubes forming part of the blood circulation system of the body, carrying mainly oxygen-depleted blood towards the heart (OxfordDictionaries.com).

M.E. veine, from O.Fr. veine "vein, artery, pulse," from L. vena "a blood vessel," also "a water course, a vein of metal," of unknown origin.

Siyâhrag, literally "black vessel," from siyâh, → black, + rag, → vessel.

Vela
  بادبان   
Bâdbân (#)

Fr.: Voile   

The Sail. A part of the constellation Argo in the Southern hemisphere, which was later divided into three parts, the others being Carina and Puppis. Vela is situated at about 10h right ascension, -50° declination. Abbreviation: Vel; Genitive: Velorum.

From L. vela, plural of velum "sail, curtain, covering," velare "to cover, veil."

Bâdbân "sail," literally "wind keeper," from bâdwind + -bân a suffix denoting "keeper, guard," sometimes forming agent nouns or indicating relation, → host.

Vela pulsar
  پولسار ِ بادبان، تپار ِ ~   
pulsâr-e Bâdbân, tapâr-e ~

Fr.: pulsar du Voile   

A pulsar with a short period (89 milliseconds) associated with the → Vela supernova remnant. It is approximately 1500 light-years distant. The Vela pulsar is one of the few pulsars detectable optically. Its optical flashes, of visual magnitude 26, were detected in 1977. Also named PSR 0833-45.

Vela; → pulsar.

Vela supernova remnant
  بازمانده‌ی ِ اَبَر-نو‌اَختر ِ بادبان   
bâzmânde-ye abar-now-axtar-e Bâdbân

Fr.: reste de supernova du Voile   

A → supernova remnant located in the southern Milky Way in the constellation → Vela. It has a large angular diameter of about 8° and lies 250 ± 30 pc away (Cha et al. 1999, ApJ 515, L25). Its overall emission is dominated by the interaction of the → supernova blast wave with the → interstellar medium. This SNR is also notable for a number of protrusions extending well beyond its rim, which were suggested to be fragments of ejecta from the supernova explosion. X-ray spectroscopy has since confirmed several of these protrusions to indeed be strongly enriched with ejecta. The age of the SNR is estimated to be ~11,000 years, based on the spin-down rate of the associated → Vela pulsar, but ages as large as 20,000-30,000 years have also been argued.

Vela; → supernova remnant.

Vela X
  بادبان X   
Bâdbân X

Fr.: Vela X   

A compact radio source about 1500 light-years distant associated with the Vela supernova remnant. It has a nonthermal radio spectrum and is about 20 percent polarized. It is associated with the Gum Nebula, the Vela pulsar, and the X-ray source 2U 0832-45.

Vela; X for → X ray.

velocity
  تندا   
tondâ

Fr.: vitesse   

The time rate of change of position in a given direction, measured as length per unit time. → speed.

L. velocitatem (nominative velocitas) "swiftness, speed," from velox (genitive velocis) "swift."

Tondâ, from tond "swift, rapid, brisk; fierce, severe" (Mid.Pers. tund "sharp, violent;" Sogdian tund "violent;" cf. Skt. tod- "to thrust, give a push," tudáti "he thrusts;" L. tundere "to thrust, to hit" (Fr. percer, E. pierce, ultimately from L. pertusus, from p.p. of pertundere "to thrust or bore through;" PIE base *(s)teud- "to thrust, to beat") + noun suffix .

<< < -es -iv -ti 21- a p abe abs abs acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arb are ari art ass ast ast ast Atl ato ato Aug aut awa azi bac bal Bar Bar Bay bea Bep Bet BIC bij bin bio bir bla bla blu blu bol Boo bou Bq bre bri bub B[e cal cal can car car Cas cat cau cel cen Cer cha cha cha che chi CI cir cir cla cle clo clu co- cob 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 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 deu dia dif dif dif dim dip Dir dis dis dis dis dis div dom dos dou dri Dum dus dyn dyn ear eas ecl Edd eff Ein eje ele ele ele ele eli emb emi Enc ene ens eph epo equ equ eru eth Eul eve evo exc exc exi exo exp exp ext ext Fab fai Fan fea fem fer fie fil fir fir fla flo flu foc For for fos fra fre fre fro fun g m Gal gal gal gas gau gel gen geo geo geo gho gla gno gra gra gra gra Gre Gre gro gyr had hal har Har HD hea hel hel Her Her Hic hig hip hol hor hos hov Hub hun hyd hyd Hyd hyp IC ide ill ima imp imp inc inc ind ind inf 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 Kle Kui Lag lam Lap Lar lat law lea len lep Lib lig lim lin lin Lio lit loc LOF lon Lor low lum lun Lup Lyo mac mag mag mag mag mag mai man Mar mas mas mat Max mea mec Mei Mer 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 oxi pai pan par par par par pas pea pen per per per per Per pet pha Pho pho pho pho Pic Pis Pla pla pla pla Ple poa pol pol pol pol pop pos pos pow 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 rar Ray rea Rea rec rec red red ref ref reg rel rel rel rep res res res res ret Rhe rid rig ris Roe Ros rot rub rut Sag 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 sol sou sou spa spe spe spe spe sph spi spl spu sta sta sta sta sta ste ste sti sto str Str sub sub sub sul sup sup sup sup sur sus sym syn sys Tam Tay tel ten Ter Tha the the the thi thr tib tid tim tok Tor tot tra tra tra tra Tri tri tro tru tur twi Typ ufo ult unc uni uni uni upl ura uti val var vec vel ver ver vil vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yea You zer zod > >>