An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 12992 Search : far
inheritance
  ریگن‌برد، ریگنبرد، دریگش   
riganbord, darigeš

Fr.: hériter   

1) Something that is or may be inherited; property passing at the owner's death to the heir or those entitled to succeed; legacy; something, as a quality, characteristic, or other immaterial possession, received from progenitors or predecessors as if by succession.
2) The genetic characters transmitted from parent to offspring, taken collectively.
3) The act or fact of inheriting by succession, as if by succession, or genetically (Dictionary.com).

Verbal noun of → inherit.

inheritor
  ریگن‌بر، ریگنبر   
riganbar

Fr.: héritier   

A person who → inherits; → heir.

inherit; → -or.

inhomogeneity
  ناهمگنی   
nâhamgeni (#)

Fr.: inhomogénéité   

The condition or an instance of not being homogeneous.

in- "not" + → homogeneity.

inhomogeneous
  ناهمگن   
nâhamgen (#)

Fr.: inhomogène   

Lack of homogeneity; something that is not → homogeneous.

in- "not" + → homogeneous.

initial
  آغازین   
âqâzin (#)

Fr.: initial   

Of, pertaining to, or occurring at the beginning.

Initial, from L. initialis, from initium "a beginning, an entrance," from p.p. stem of inire "to go into, begin," from → in- + ire "to go," → ion.

Âqâzin "pertaing to the beginning," from âqâz "beginning," from Proto-Iranian *āgāza-, from prefix ā- + *gāz- "to take, receive," cf. Sogdian āγāz "beginning, start," pcγz "reception, taking."

initial conditions
  بوتارهای ِ آغازین   
butârhâ-ye âqâzin

Fr.: conditions initiales   

1) Conditions at an initial time t = t0 from which a physical system or a given set of mathematical equations evolves.
2) Meteo.: A prescription of the state of a → dynamical system at a specified time; for all subsequent times, the → equation of motion and → boundary conditions determine the state of the system.

initial; → condition.

initial mass
  جرم ِ آغازین   
jerm-e âqâzin (#)

Fr.: masse initiale   

The mass of a star at its arrival on the → main sequence.

initial; → mass.

initial mass function (IMF)
  کریا‌ی ِ آغازین ِ جرم   
karyâ-ye âqâzin-e jerm

Fr.: fonction initiale de masse   

A mathematical expression describing the relative number of stars found in different ranges of mass for a cluster of stars at the time of its formation. It is defined as φ(log M) = dN / dlog M ∝ M, where M is the mass of a star and N is the number of stars in a logarithmic mass interval. The value of the slope found by Salpeter (1955) for → low-mass and → intermediate-mass stars in the → solar neighborhood is Γ = 1.35. The IMF can be expressed also in linear mass units: χ(M) = dN / DM ∝ M. Note that χ(M) = (1 / M lm 10) φ(log M), and α = Γ + 1. In this formalism the Salpeter slope is α = 2.35. There is a third way for representing the IMF, in which the exponent is x = -α. The IMF is not a single power law over all masses, from → brown dwarfs to → very massive stars (Kroupa, 2002, Science 295, 82). Different slopes have been found for different mass segments, as follows: α = 1.3 for 0.08 ≤ Msolar < 0.5; α = 2.3 for 0.5 ≤ Msolar < 1; α = 2.3 for 1 ≤ Msolar. The IMF at low masses can be fitted by a → lognormal distribution (See Bastian et al., 2010, ARAA 48, 339 and references therein). See also → canonical IMF.

initial; → mass; → function.

initial phase angle
  زاویه‌ی ِ فاز ِ آغازین   
zâviye-ye fâz-e âqâzin

Fr.: angle de phase initial   

The value of the phase corresponding to the origin of time. Same as the → epoch angle.

initial; → phase; → angle.

initial singularity
  تکینی ِ آغازین   
takini-ye âqâzin (#)

Fr.: singularité initiale   

An instant of infinite density, infinite pressure, and infinite temperature where the equations of general relativity break down, if the standard Big Bang theory is extrapolated all the way back to time zero. → singularity.

initial; → singularity.

initiative
  بنگام   
bongâm

Fr.: initiative   

1) The first step or action of a matter; commencing move.
2) An introductory act or step; leading action.

From Fr. initiative, from L. initiatus, p.p. of initiare "to begin," from initium "a beginning," → initial.

Bongâm, from bon "basis; root; foundation; bottom," → fundamental, + gâm "step, pace," → egress.

inject
  در‌شاندن   
daršândan

Fr.: injecter   

1) General: To force into a passage, cavity, or tissue.
2) Math.: Verbal form related to → injection.

From L. injectus, p.p. of injicere "to throw in or on," from → in- "in" + -icere, combining form of jacere "to throw."

Daršândan, from darešândan, from dar-, → in, + ešândan, → eject.

injection
  درشانش   
daršâneš

Fr.: injection   

1) General: The act of injecting. Something that is injected.
2) Physics: The process of introducing electrons or holes into a semiconductor so that their total number exceeds the number present at thermal equilibrium. → hole injection.
3) Math.: A one-to-one → mapping. In other words, a mapping from a → set A onto a set B such that for every element in B there is at the most an element in A.

Verbal noun of → inject.

injective
  درشانی   
daršâni

Fr.: injectif   

Of or pertaining to a → injection.

Adj. related to → injection.

inlet
  شاخابه   
šâxâbé (#)

Fr.: grau, crique, bras de mer, bras de rivière   

A small arm of the sea, a lake, or a river.

From → in- + let "to allow," M.E. leten, O.E. lætan; cognate with Du. laten, Ger. lassen, akin to Gk. ledein "to be weary", L. lassus "tired."

Šâxâbé, literally "branch of water," from šâx, → branch, + âb "sea, river, → water" + noun suffix .

inner
  درونی   
daruni (#)

Fr.: interne   

Situated within or farther within; interior.

From O.E. inra, comparative of inne (adv.) "inside;" → in-.

Daruni, adj. of darun "in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river").

inner core
  مغزه‌ی ِ درونی   
maqze-ye daruni

Fr.: noyau interne   

The central part of the → Earth's core, composed of solidified → iron and → nickel, and extending from a depth of about 5100 km to the center of the Earth, at 6360 km. Its radius is about 1/3 that of the whole core and is effectively decoupled from the → mantle due to the molten nature of the surrounding → outer core. The radius of the inner core is defined by a small increase in → compressional wave velocity at a radius of about 1200 km. Its density is about 12 g/cm3. The → temperature of the inner core has been estimated at 5000-7000 °C.

inner; → core.

inner Earth object (IEO)
  بر‌آخت ِ درونی ِ مدار ِ زمین   
barâxt-e daruni-ye madâr-e zamin

Fr.: objet interne à l'orbite terrestre   

A → near-Earth object whose → orbit lies always inside Earth's orbit.

inner; → Earth; → object.

inner Lagrangian point
  نقطه‌ی ِ لاگرانژ ِ درونی   
noqte-ye Lagrange-e daruni (#)

Fr.: point de Lagrange interne   

One of the five → Lagrangian points, denoted L1, which lies between the two bodies on the line passing through their center of mass. In a → close binary star system mass transfer occurs through this point.

inner; → Lagrangian points.

inner Lindblad resonance (ILR)
  باز‌آوایی ِ لیندبلاد ِ درونی   
bâzâvâyi-ye Lindblad-e daruni

Fr.: résonance de Lindblad interne   

A → Lindblad resonance expressed by: Ωp = Ω - κ/m.

inner; → Lindblad resonance.

<< < -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 arc Arg ari art ass ast ast ast atm ato att Aur aut axi azi bac Bal Bar Bar Bay Bec Ber bet bic bij bin bio Bir bla Bla blu blu bol Boo bou bra Bre bro bug C r cal Cal can car Car Cas cat cau 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 Cop Cor cor cor cos cos Cou cou cow cre cri cro cry cur cut Cyg dam dar dat de deb dec dec ded def deg del dem den dep des det dev dia dif dif dig dio Dir dis dis dis dis dis dis div don dou dow dro dur dwa dyn Dys ear ebb ecl edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ Equ esc eth Eur eve exa exc exe exi exp exp ext ext eye fac fal Far fed fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub hum Huy hyd hyd hyl hyp ice ide ima imm imp imp inc ind ind ine inf inf Inf inh inn ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jun K s Kep keV kin Kol lad Lam lan lar las lat lea leg len lev lig lik lin lin lin Lis lob loc log loo low lum lun lun Lym Mac Mag mag mag mag mag Mag mak map Mar mas mat Mau mea mea med Men mer Mes met met mho mic Mie Mil min mis MK mod mol mon moo mot mul mul mut nak Nas nat neb neg neu neu New New nip noi non non noo Nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phi pho pho pho phy pin Pla pla pla pla pla plu poi pol pol pol poo pos pos pot pra pre pre pre pre pri pri pro pro pro pro pro Pro pro pse pul pur qua qua qua qua que rac rad rad rad rad rad rad ran rar ray rea rea rec rec red red ref ref reg rel rel rel ren res res res res ret rev Ric rig rin roc roo rot rot Rus Sac sal sat sca sca Sch sci Scu sec sec Sed sel Sel sen ser sex Sha she sho sid sig sil sim sin siz sle SMA SNR Sof sol sol sol sol sou Sou spa Sp spe spe spe sph spi Spi spr sta sta sta sta sta ste ste Ste sto str str sub sub sub suf sun sup sup sup sup sur swo syn sys tak Tay Tel ten ter tet the the the thi Tho thu tid tim toa top tot tra tra tra tra tri tri tro Tru tur twi Typ UBV ult unb uni uni Uni Unu ura uti val vap vec Vel ver Ver vie vir vis vis vol W-R war wav wav wea wei Whe Wid win WN4 Wol X-p Yal you zep zir > >>