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 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
diurnal libration
  هلازان ِ روزانه   
halâzân-e ruzâne

Fr.: libration diurne   

Daily geometrical libration of the Moon arising from the fact that observers at different points on the Earth see the Moon from slightly different angles. As the Moon rises in the east, you are positioned on one side of our planet, and by the time it sets in the west. Earth's rotation has carried you to the other side. This change in position produces a slight → parallax effect that adds about another 1° of libration in longitude. Two other geometrical libration are → libration in longitude and → libration in latitude. See also → physical libration.

diurnal; → libration.

diurnal motion
  جنبش ِ روزانه   
jonbeš-e ruzâné

Fr.: mouvement diurne   

The daily apparent motion of all celestial objects, due to Earth's rotation.

diurnal; → motion.

diurnal parallax
  دیدگشت ِ روزانه   
didgašt-e ruzâné

Fr.: parallaxe diurne   

The apparent difference between the position of a celestial object measured from the Earth's surface and the position that would be recorded by a hypothetical observer at the center of the Earth. Same as → geocentric parallax.

diurnal; → parallax.

dive
  ۱) غوته ۲) غوته خوردن   
1) quté, 2) quté xordan

Fr.: 1) plongon; 2) plonger   

1a) An act or instance of diving.
1b) A jump or plunge into water, especially in a prescribed way from a diving board.
2a) To go below the surface of the water, as a submarine.
2b) To → plunge into water, especially headfirst.
2c) Aeronautics: (of an airplane) to descend rapidly (Dictionary.com).

M.E. diven "to dive, dip," O.E. dufan (strong verb) "to dive, duck, sink" and dyfan "to dip, submerge" (weak, transitive), related to → deep.

Quté is possibly Pers., since Farhang-e Asadai records it with "t" and not Ar. "tayn" (Dehxoda), although its etymology is not established. We propose ultimately from Proto-Ir. *ui-pat-, from *pat- "to fall, to fly," to which is related Pers. oft-, oftâdan "to → fall;" cf. Pashto. qupah "a dip, a dive, a plunge."

diverge
  واگراییدن   
vâgerâyidan (#)

Fr.: diverger   

(v.intr.) To move, or extend in different directions from a common point.
Math.: Of a sequence or series, to have no unique limit.

M.L. divergere, from → di- "apart," variant of → dis- + vergere "to bend, turn, incline," from PIE *werg- "to turn," from base *wer- "to turn, bend" (cf. L. vertere "to turn," Av. varət- "to turn," Mod.Pers. gard, gardidan "to turn," Skt. vartate "turns round, rolls," Gk. rhatane "stirrer, ladle," Ger. werden, O.E. weorðan "to become."

Verâyidan, from vâ- "apart," → de-, + gerâyidan "to incline toward; to intend; to make for," infinitive of gerâ, the etymology of which is not clear. Gerâ may be a variant of Mod.Pers. kil "bent, inclined" (k/g and l/r interchanges), from PIE base *klei- "to lean, incline," cognate with L. clinare "to bend" (E. declination, inclination, etc.), Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," P.Gmc. *khlinen (Ger. lehnen, E. lean).

divergence
  واگرایی   
vâgerâyi (#)

Fr.: divergence   

1) The act, fact, or amount of diverging.
2) Math.: A differential → operator that, for a three-dimensional vector function F(x,y,z), is the sum of the → scalar products of the unit vectors and the partial derivatives in each of the three component directions. It is written as div F or ∇ . F = (∂F/∂x)i + (∂F/∂y)j + (∂F/∂z)k, ∇ being the → del operator or → nabla. The divergence of a vector field is a → scalar field. In physics, this operator is used to derive the amount of flux per unit volume leaving an infinitesimal element of volume at a point in a vector field. For example, in an electrostatic field, the divergence of the field is zero unless the volume element contains an electric charge.

From diverge, → diverge, + -ence a noun suffix.

Vâgerâyi, from vâgerâ stem of vâgerâyidan, → diverge, + noun suffix -i.

divergence theorem
  فربین ِ واگرایی   
farbin-e vâgerâyi

Fr.: théorème de flux-divergence   

Same as → Gauss's theorem.

divergence; → theorem.

divergent
  واگرا   
vâgerâ (#)

Fr.: divergent   

Relating to or causing divergence. Gowing away in different directions from a common point or path.
Math.: Failing to approach a limit.

M.L. divergent-, stem of divergens pr.p. of divergere, from → di- "apart," variant of → dis- + vergere "to bend, turn, incline," from PIE *werg- "to turn," from base *wer- "to turn, bend" (cf. L. vertere "to turn," Av. var ət- "to turn," Mod.Pers. gard, gardidan "to turn," Skt. vartate "turns round, rolls," Gk. rhatane "stirrer, ladle," Ger. werden, O.E. weorðan "to become."

Vâgerâ, agent noun from vâgerâyidan, → diverge + noun suffix -i.

divergent lens
  عدسی ِ واگرا   
adasi-ye vâgerâ (#)

Fr.: lentille divergente   

A lens which causes a parallel beam of light passing through it to diverge or spread out; concave lens. Same as diverging lens and → negative lens.

divergent; → lens.

diverse
  گوناگون   
gunâgun (#)

Fr.: diversité   

1) Differing from one another.
2) Composed of various kinds or forms; multiform.

M.E., from L. diversus, p.p. of divertere "to divert," from → di- + vert, from vertere "to turn," → convert.

Gunâgun, literally "of different kinds, sorts, species," from gun "kind, species, sort."

diversity
  گوناگونی   
gunâguni (#)

Fr.: diversité   

The state or fact of being diverse; difference; unlikeness.

diverse; → -ity.

dividend
  بخشی   
baxši (#)

Fr.: dividende   

A number which is to be divided by another number (→ divisor). Example: 36 in the expression 36 : 9 = 4.

From L. dividendum "thing to be divided," → division.

Bâxši, from bâxš, → division.

division
  ۱) بخش؛ ۲) شکاف   
1) baxš; 2) šekâf

Fr.: division   

1) The act or process of dividing; state of being divided.
Math.: An operation in which a dividend is divided by a divisor to give a quotient and a remainder.
2) Something that marks a division; a separation.

From O.Fr. division, from L. divisionem (nom. divisio), from divid-, stem of dividere "to cleave, distribute," from → dis- "apart" + -videre "to separate," from PIE base *widh- "to separate."

1) Baxš "portion, part, division," baxšidan "to divide, distribute, grant;" Mod./Mid.Pers. baxt "fortune, fate," baxtan, baxšidan "to distribute, divide," bâq "garden," initially "piece or patch of land," baq "god, lord;" Av. bag- "to attribute, allot, distribute," baxš- "to apportion, divide, give to," baxta- "what is allotted (luck, fortune)," baxədra- "part, portion," baγa- "master, god;" O.Pers. bāji- "tribute, tax;" cf. Skt. bhaj- "to share, divide, distribute, apportion," bhájati "divides," bhakta- "allotted; occupied with; a share; food or a meal, time of eating?" pitu-bháj- "enjoying food;" Gk. phagein"to eat (to have a share of food)"; PIE base *bhag- "to share out, apportion."
2) Šekâf "a fissure, crack, slit," šekâftan "to divide into two long strips, split, break," Mid.Pers. škâftan.

division sign
  نشانه‌ی ِ بخش   
nešâne-ye baxš

Fr.: signe de division   

A symbol placed between two quantities (dividend and the divisor) to indicate the division of the first by the second. The division sign is written as a horizontal line with dot above and dot below, ÷ (→ obelus), or a slash or horizontal line.

division; → sign.

divisor
  بخشیاب   
baxšyâb (#)

Fr.: diviseur   

A number by which another number, the → dividend, is divided.

division; → -or.

Baxšyâb, literally "division finder, ~ obtainer," from baxš, → division, + yâb, → finder.

divorce
  ۱) وسین؛ ۲) وسینیدن   
1) vosin; 2) vosinidan

Fr.: 1) divore; 2) divorcer   

1a) The legal dissolution of a marriage by a court or other competent body.
1b) A legal decree dissolving a marriage.
2) Legally dissolve one's marriage with someone (OxfordDictionaries.com).

M.E., from O.Fr. divorce from L. divortium "separation, dissolution of marriage," from divertere "to turn in different directions, to separate," from di- blended with → de- "apart," + vertere "to turn," → version.

Vosin, from Sangesari vovsin "divorce," related to Mid.Pers. visastan "to break," Mod.Pers. gosastan, ultimately from Proto-Ir. (+ *ui-) *said- "to break, split;" cf. Av. (+ *aua-) auua.siδ- "to split;" Baluci sist/sid-, sind- "to break, split;" Skt. ched "to split, to cut off;" Gk. sizo "to cut through, to split;" L. scindo "I tear up."

DO white dwarf
  سفید‌کوتوله‌ی ِ DO   
sefid kutule-ye DO

Fr.: naine blanche DO   

A → white dwarf whose spectrum shows strong lines of singly ionized helium He II; He I or H may be present. As a DO star cools, the He II will recombine with free electrons to form He I, eventually changing the DO type into a DB white dwarf.

D short for → dwarf; O a convention; → white.

document
  ۱) دپه؛ ۲) دپیدن   
1) dapé; 2) dapidan

Fr.: 1) document; 2) (se) documenter   

1) A written or printed paper furnishing information or evidence, as a passport, deed, bill of sale, or bill of lading; a legal or official paper.
2) To furnish with documents. To furnish with references, citations, etc., in support of statements made (Dictionary.com).

M.E., from O.Fr. document "written evidence," from L. documentum "example, proof, lesson," in M.L. "official written instrument," from docere "to show, teach," cognate with Av. daē- "to show," Pers. andišidan, → think.

Dapé, from Mid.Pers. dib, dip "document;" O.Pers. dipī- "inscription;" related to dabir, → secretary; dapidan, infinitive from dap, dapé.

documentary
  دپگی، دپگین   
dapegi, dapegin

Fr.: documentaire   

1) Pertaining to, consisting of, or derived from documents.
2) Movies, Television: Based on or re-creating an actual event, era, life story, etc., that purports to be factually accurate and contains no fictional elements (Dictionary.com).

document; → -ary.

documentation
  دپش   
dapeš

Fr.: documentation   

1) The use of documentary evidence.
2) A furnishing with documents, as to substantiate a claim or the data in a book or article.
3) Computers: Manuals, listings, diagrams, and other hard- or soft-copy written and graphic materials that describe the use, operation, maintenance, or design of software or hardware (Dictionary.com).

document; → -tion.

<< < -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 > >>