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 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
east
  خاور   
xâvar (#)

Fr.: est   

The point on the → celestial horizon 90° → clockwise from the → north point. The point where the Sun rises at the → equinoxes.

O.E. east, from P.Gmc. *aus-to-, *austra- "east, toward the sunrise" (cf. Du. oost, Ger. Ost, O.N. austr "from the east"), from PIE *aus- "dawn" (cf. Av. uš-, ušah- "dawn," Skt. usas-, usah- "dawn," Gk. aurion "morning," Lith. auszra "dawn," L. aurora "dawn," auster "south").

Xâvar "east," originally "west," from Mid.Pers. *xvar barân "where the Sun is led," from xvar "sun" (Av. hū-, hvar- "sun", cf. Skt. surya-, Gk. helios, L. sol, O.H.G. sunna, Ger. Sonne, E. sun; PIE base *sawel- "sun") + barân, pr.p. of bar-, bordan "to carry, lead" (Mid.Pers. burdan, O.Pers./Av. bar- "to bear, carry," barəθre "to bear (infinitive)," Skt. bharati "he carries," Gk. pherein, L. fero "to carry;" PIE base *bher- "to carry") + time and place suffix -ân.

eastern
  خاوری   
xâvari (#)

Fr.: est, de l'est, oriental   

Lying toward or situated in the east.

From → east + -ern an adjective suffix occurring with names of directions.

Xâvari from xâvar, → east, + -i adj. suffix.

eastern elongation
  درازش ِ خاوری   
derâzeš-e xâvari

Fr.: élongation est   

The position of a planet when it can be seen in the western sky just after sunset.

eastern; → elongation.

easy
  آسان   
âsân (#)

Fr.: facile, aisé   

1) Not hard or difficult; requiring no great labor or effort.
2) Free from pain, discomfort, worry, or care (Dictionary.com).

M.E. aisie, esy, from O.Fr. aisie "comfortable, at ease, rich, well-off," p.p. of aisier "to put at ease," from aise "comfort, pleasure, well-being," of unknown origin.

Âsân "easy," from Mid.Pers. âsân "calm, quiet, at rest, peaceful, easy," related to âsudan "to rest, repose;" Av. ā- + saē- (saii-) "to lie down, go to sleep," → holiday.

eavesdrop
  گوشاردن   
gušârdan

Fr.: écouter de façon indiscrète   

To listen secretly to a private conversation.

Probably back-formation from → eavesdropper.

Gušârdan, from gušâr, → eavesdropper, + -dan infinitive suffix.

eavesdropper
  گوشار   
gušâr (#)

Fr.: écouteur   

A person or thing that secretly listens to or monitors the private conversation or data of others.

From M.E. eavesdrop, from O.E. yfesdrype "place around a house where the rainwater drips off the roof," literally "one who stands on the eavesdrop in order to listen to conversations inside the house," from eaves "the lower border of a roof that overhangs the wall" + drip, drop "to fall in small portions."

Gušâr in Tabari "eavesdropper," from guš, → ear, + -âr probably contraction of dâr (as in dustâr/dustdâr) agent noun from dâštan "to hold, have, possess; appoint, erect," → property.

eavesdropping
  گوشاری   
gušâri (#)

Fr.: écoute éléctronique   

The monitoring and/or examining the data that is passed over the network without sender and receiver's permission and/or knowledge. For example, a user on the Internet could eavesdrop on someone's phone conversation or e-mail.

Noun from → eavesdrop.

ebb tide
  بازکش   
bâzkeš (#)

Fr.: reflux   

A → tidal current that generally moves seaward and occurs during the part of the tide cycle when sea level is falling.

M.E. eb(be); O.E. ebba; cognate with O.Fr. ebba, Du. eb(be), Ger. Ebbe ebb, M.E. ebben, O.E. ebbian, derivative of the noun; akin to → off; PIE base *apo- "off, away;" → tide.

Bâzkeš, from bâz- a suffix denoting "reversal, repetition, opposition," → re-, + keš present stem of kešidan "to draw, drag, carry," → tide.

eccentric
  اسمرکز   
osmarkaz

Fr.: eccentrique   

1) An orbit that has a high → eccentricity, i.e. is highly elliptical.
2) In Ptolemy's geocentric model, a → deferent which is slightly off-center from the Earth.

ex-; → center; → -ic.

eccentric anomaly
  ناسانی ِ اسمرکز   
nâsâni-ye osmarkaz

Fr.: anomalie eccentrique   

Of a planetary orbit, the angle measured from the perihelion position, to the center of the circumscribing auxiliary circle, to the projected position of the planet on the circle. → anomaly; → mean anomaly; → true anomaly.

eccentric; → anomaly.

eccentricity
  اسمرکزی   
osmarkazi

Fr.: eccentricité   

The amount by which the orbit deviates from circularity: e = c/a, where c is the distance from the center to a focus and a the semi-major axis. If e = 0, the orbit is a circle. If e < 1, the orbit is an ellipse, if e > 1 it is a hyperbola, and if e = 1 it is a parabola. The eccentricity is one of the six → orbital elements that define a → Keplerian orbit.

eccentric; → -ity.

echelle grating
  توری ِ نرده‌ای   
turi-ye narde-yi (#)

Fr.: réseau à échelle   

A diffraction grating in which the groves are relatively widely spaced and serves to provide high resolution and dispersion.

Echelle, from Fr. échelle "ladder," , from O.Fr. eschele, from L. scala "ladder;" → grating.

Turi, → grating; nardé, contraction of nardebân "ladder; échelle."

echelle spectrograph
  بیناب‌نگار ِ نرده‌ای   
binâbnegâr-e narde-yi (#)

Fr.: spectrographe à échelle   

A spectrograph that uses an echelle grating to disperse the light.

echelle grating; → spectrograph.

echo
  پژواک   
pažvâk (#)

Fr.: écho   

Acoustics: Effect produced when sound is reflected or thrown back on meeting a solid obstacle.
Radio.: A wave returned to the transmitter with sufficient magnitude and delay to be distinguished from the directly transmitted wave. In radar, the portion of the energy of the transmitted pulse reflected back to the receiver.

From L. echo, from Gk. echo, personified as a mountain nymph, from ekhe "sound."

Pažvâk, literally "return sound," from paž "back, against, opposite," varaint pâd- (Mid.Pers. pât-, from O.Pers. paity "agaist, back, opposite to, toward, face to face, in front of;" Av. paiti, akin to Skt. práti "toward, against, again, back, in return, opposite;" Pali pati-; Gk. proti, pros "face to face with, toward, in addition to, near;" PIE *proti) + vâk "sound," Mid./Mod.Pers. vâng/bâng "sound, clamour;" Av. vacah- "word," from vac- "to speak, say;" cf. Mod.Pers. vâžé "word," âvâz "voice, sound, song" (Skt. vakti "speaks, says," vacas- "word;" Gk. epos "word;" L. vox "voice;" PIE base *wek- "to speak").

eclipse
  گرفت   
gereft (#)

Fr.: éclipse   

The passage of the shadow of a celestial body over the surface of another. The maximum number of solar and lunar visible eclipses occurring annually is seven; the minimum number is two, both being solar. → Solar eclipses take place when the new Moon is close to an → orbital node and on the same longitude with the Sun. At that moment either the → umbra, → antumbra, or the → penumbra touches the Earth's surface. For an observer located in the umbra the eclipse is total, while for one placed in the antumbra it is annular. → Annular eclipses occur around lunar → apogee. An observer situated in the penumbra sees only a → partial eclipse. A total or annular eclipse can be seen from a band with a width of 270 km at the most, around which, the much larger partiality zone extends. The Moon's shadow crosses the Earth from west to east at about 3,200 km/h. During → total eclipses the Sun's disk is entirely covered and the → solar corona can be seen. A solar eclipse can last up to 3 h (between the first and the → fourth contacts). Totality has a theoretical maximum duration of 7m 31s, but it is usually shorter. A → lunar eclipse can be seen from any place on Earth where the Moon is above the horizon; it occurs when the full Moon passes through the central dark shadow of the Earth. The Earth's shadow is much wider than the Moon and this is why the lunar eclipses can last up to four hours (between the first and the fourth contact) (M.S.: SDE).

From O.Fr. éclipse, from L. eclipsis, from Gk. ekleipsis "a leaving out, forsaking, an eclipse," from ekleipein "to forsake a usual place, fail to appear, be eclipsed," from ek "out," → ex-, + leipein "to leave."

Gereft, past stem of gereftan "to obscure, close up; to take, seize, catch; to undergo an eclipse," from Mid.Pers. griftan, Av./O.Pers. grab- "to take, seize," cf. Skt. grah-, grabh- "to seize, take," graha "seizing, holding, perceiving" (see also → concept); cf. M.L.G. grabben "to grab;" E. grab "to take or grasp suddenly;" PIE base *ghrebh- "to seize".

eclipse magnitude
  برز ِ خورگرفت   
borz-e xorgereft

Fr.: grandeur de l'éclipse, magnitude ~ ~   

The fraction of the Sun's diameter occulted by the Moon. It is strictly a ratio of diameters and should not be confused with → eclipse obscuration, which is a measure of the Sun's surface area occulted by the Moon. Eclipse magnitude may be expressed as either a percentage or a decimal fraction (e.g., 50% or 0.50). By convention, its value is given at the instant of → greatest eclipse (F. Espenak, NASA).

eclipse; → magnitude.

eclipse mapping
  نقشه‌برداری ِ گرفتی   
naqše bardâri-ye gerefti

Fr.: cartographie par éclipse   

A method for imaging the continuum light distributions of the → accretion disks of → cataclysmic variable stars. It relies on geometrical information contained in eclipse light curves. An alternative method is → Doppler tomography.

eclipse; → mapping.

eclipse obscuration
  تیره‌شد ِ خورگرفت   
tirešod-e xorgereft

Fr.: obscuration de l'éclipse   

The fraction of the Sun's area occulted by the Moon. It should not be confused with → eclipse magnitude, which is the fraction of the Sun's diameter occulted by the Moon. Eclipse obscuration may be expressed as either a percentage or a decimal fraction (e.g., 50% or 0.50) (F. Espenak, NASA).

eclipse; obscuration, verbal noun from → obscure.

eclipse season
  فصل ِ گرفت   
fasl-e gereft

Fr.: saison d'éclipse   

The period during which the Sun is close enough to one of the → lunar orbit nodes so that an eclipse can take place. This time window lasts for 37 days for → solar eclipses and almost 24 days for → lunar eclipses. These seasons occur every 173.31 days. Two eclipse seasons make up an → eclipse year.

eclipse; → season.

eclipse year
  سال ِ گرفتی   
sâl-e gerefti

Fr.: année des éclipses   

The interval of time (346.620 03 days) between two successive passages of the Sun through the same node of the Moon's orbit. It takes less than a solar year to complete an eclipse year because the Moon's orbit and the lunar nodes are slowly regressing.

eclipse; → year.

<< < -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 > >>