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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 12948 Search : far
de-redden
  واسرخیدن   
vâsorxidan

Fr.: dérougir   

To correct the intensity or flux of a spectral line by eliminating the → reddening effect of → interstellar dust.

De-redden, from → de- + redden verb of → red.

Vâsorxidan, from vâ-, → de-, + sorxidan verb of sorx, → red.

de-reddened magnitude
  برز ِ واسرخیده   
borz-e vâsorxidé

Fr.: magnitude dérougie   

A magnitude which has been corrected for the interstellar reddening.

De-reddened, p.p. of → de-redden; → magnitude.

Borz, → magnitude; vâsorxidé p.p. of vâsorxidan, → de-redden.

de-reddening
  واسرخش   
vâsorxeš

Fr.: dérougissement   

The process that de-reddens. The state of being de-reddened.

Verbal noun of → de-redden.

deactivate
  فروژیراندن   
foružirândan

Fr.: désactiver   

To cause to be → inactive; remove the → effectiveness of (Dictionary.com).

de-; → activate.

dead
  مرده   
mordé (#)

Fr.: mort   

1) Deprived of life.
2) No longer producing or functioning. → dead pixel.

M.E. deed, O.E. dead "dead;" cf. O.S. dod, Dan. død, Swed. död, Du. dood, O.H.G. tot, Ger. tot; PIE *dhou-toz-, from base *dheu- "to die."

Mordé "dead," p.p. of mordan, mir- "to die," → death.

dead pixel
  پیکسل ِ مرده   
piksel-e mordé

Fr.: pixel mort   

Of a → CCD detector, a pixel that is not sufficiently active.

dead; → pixel.

deadline
  روزبند   
ruzband

Fr.: date limite, ~ boutoir, ~ de clôture   

The time by which something must be finished or submitted; the latest time for finishing something (Dictionary.com).

Historically, during the American Civil War, the term referred to a physical line or boundary beyond which prisoners were shot; → dead; → line.

Ruzband, literally "day lock, that which blocks date," from ruz, → day, + band, → bond; cf. Ger. Stichtag, Anmeldeschluss, Einsendeschluss and Fr. date de clôture.

death
  مرگ   
marg (#)

Fr.: mort   

The act of dying; the end of life.

M.E. deeth, O.E. deað (cf. O.S. doth, O.Fris. dath, Du. dood, O.H.G. tod, Ger. Tod, O.N. dauði, Dan. død, Swed. död, Goth. dauþas "death"), from *dheu- "to die" + *-thuz "-th;"

Marg "death," from Mid.Pers. marg "death;" Av. mahrka- "death," mərəxš- "ruin;" related to Mod.Pers. mordan (present stem mir-) "to die;" Mid.Pers. murdan "to die;" O.Pers. mrt- "to die," amriyta "dies," martiya- "(mortal) man" (Mod.Pers. mard "man"); Av. mərəta- "died;" cf. Skt. mar- "to die," mrti- "death," marc- "to damage, hurt, injure;" PIE base *mor-/*mr- "to die." Cognates in other IE languages: Gk. emorten "died," ambrotos "immortal;" L. morior "I die," mortuus "dead" (Fr. mourir "to die," mort "dead"); Arm. merani- "to die;" O.C.S. mrutvu "dead;" O.Ir. marb; Welsh marw "died;" O.E. morþ "murder;" Lith. mirtis.

debate
  ۱) وازت؛ ۲) وازتیدن   
1) vâzat; 2) vâzatidan

Fr.: 1) débat; 2) débattre   

1a) A → discussion, as of a public question in an assembly, involving opposing viewpoints.
1b) A formal contest in which the affirmative and negative sides of a proposition are advocated by opposing speakers.
2) To engage in argument or discussion, as in a legislative or public assembly (Dictionary.com).

M.E. debaten, from O.Fr. debatre, literally "to fight," from → de- "down, completely," + batre "to beat," → beat.

Vâzat, from vâ-, → de-, + zat- (Baluci žat-) variant of zad-, zadan "to strike, beat", → beat.

debias
  ورک زدودن   
varak zodudan

Fr.: soustraire le biais   

To substract the → bias from a flat-field or science frame obtained using an electronic detector.

Debias, from → de- + → bias.

Varak zodudan, from varakbias + zodudan "to polish, clean," Mid.Pers. uzdātan, Av. uzdā-, from uz-, → ex-, + dā- "make, create."

debiasing
  ورک زدایی   
varak zodâyi

Fr.: soustraction du biais   

The process of removing the → bias from a → flat-field or science → frame. → debias

Verbal noun of → debias.

deblend
  توهم زدودن   
tuham zodudan

Fr.: séparer les composantes   

In → spectroscopy, to → resolve a → blend into its constituent → spectral lines.

Deblend, from → de- + → blend.

Tuham, → blend, + zodudan "to polish, clean," Mid.Pers. uzdātan, Av. uzdā-, from uz-, → ex-, + dā- "make, create."

deblending
  توهم زدایی   
tuham zodâyi

Fr.: séparation des composantes   

The process or state of separating or resolving into constituent → spectral lines.

Verbal noun of deblend, from → de- + → blend.

deblur
  تیگیدن، تیگ کردن   
tigidan, tig kardan

Fr.: affiner   

To → increase the → spatial resolution or the clearness of an → image. Same as → sharpen. See also → deconvolve.

Deblur, from → de- + → blur.

Tigidan "to sharpen," from tig "sharp," variants tiz, tež, tej, tij, tiq, Mid.Pers. tigr, têz, têž "sharp," O.Pers. tigra- "pointed," tigra.xauda- "pointed helmet (epithet of Scythians)," Av. tiγra- "pointed," tiγray- "arrow," tiži.arštay- "with the pointed spear," cf. Skt. tikta- "sharp, pungent, bitter," tejas- "sharpness, edge, point or top of a flame;" PIE base *st(e)ig- "to stick; pointed." Cognates in other IE languages: Gk. stizein "to prick, puncture," stigma "mark made by a pointed instrument," L. in-stigare "to goad," O.H.G. stehhan, Ger. stechen "to stab, prick," Du. stecken, O.E. sticca "rod, twig, spoon," E. stick.

deblurring
  تیگش، تیگی   
tigeš, tigi

Fr.: affinage   

The process or state of making an image sharper. → deblur; same as sharpening. → deconvolution.

Verbal noun of → deblur.

debris
  تیفال   
tifâl

Fr.: débris   

The remains of anything broken down or destroyed; rubble; ruins.
Astro.: → debris disk; → orbital debris.
Geology: An accumulation of loose fragments of rock.

From Fr. débris, from M.Fr. débriser "break down, crush," from O.Fr. debrisier, → de- + brisier "to break," from L.L. brisare.

Tifâl, from tif "rubbish, sweepings, debris" + -al relation suffix → -al.

debris disk
  گرده‌ی ِ تیفال   
gerde-ye tifâl

Fr.: disque de débris   

A disk developing around a star after the dissipation of the → protoplanetary disk of gas and dust whose material was used in the formation of planets during the first 10 million years. The resulting debris disk is mainly composed of residual → planetesimals analogous to → asteroids, → comets, and → Kuiper Belt Objects in the Solar System. Their mutual collisions produce observable → dust emission in a belt encompassing the planetary system.

debris; → disk.

debye (D)
  دبی   
debye (#)

Fr.: debye   

A → unit of electric → dipole moments, equal to 10-18 → CGS units or 3.336 x 10-30 → coulomb meter.

After Peter Joseph Wilhelm Debye (1884-1966), Dutch-born American, who made important studies in the conductivity of electricity by salt solutions and in the heat capacity of solids. He received the 1936 Nobel Prize in chemistry for his work on the structure of molecules.

Debye law
  قانون ِ دبی   
qânun-e Debye (#)

Fr.: loi de Debye   

The → Debye model at → low  → temperatures, where the → specific heat is proportional to the cube of the → absolute temperature, i.e. CV ∝ T3.

debye; → law.

Debye length
  درازای ِ دبی   
derâzâ-ye Debye (#)

Fr.: longueur de Debye   

A characteristic length scale in a → plasma, determined by the temperature and number density of the charged particles. The Debye length (in cm) is given by the expression: λD = 743(Te/ne)1/2, where Te is the electron temperature in → electron-volts and ne is the electron density in cm-3. Particles which pass each other at distances smaller than the Debye length interact directly. Outside the Debye length particle interactions are dominated by collective effects. In typical laboratory plasmas the Debye length is small compared with the plasma dimension, so that collective effects are important.

debye (D); → length.

<< < -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 > >>