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: 13046 Search : far
multiple system
  راژمان ِ بستایی   
râžmân-e bastâyi

Fr.: système multiple   

1) A system consisting of several → components.
2) → multiple star system.

multiple; → system.

multiplet
  بستایه   
bastâyé

Fr.: multiplet   

A group of spectral lines arising from transitions having a common lower energy level.

From → multi- + -plet on the model of triplet.

Bastâyé, from bastâ-multi- + euphonic -yé, from nuance suffix.

multiplicand
  بستاشو   
bastâšow

Fr.: multiplicande   

A number to be multiplied by another.

From L. multiplicandum, from multiplicandus "to be multiplied," gerundive of multiplicare, → multiply.

Bastâšow, literally "that undergoes multiplication," from bastâ, → multiple, + šow, present stem and agent noun of šodan "to become, to be, to be doing, to go, to pass," from Mid.Pers. šudan, šaw- "to go;" Av. šiyav-, š(ii)auu- "to move, go," šiyavati "goes," šyaoθna- "activity; action; doing, working;" O.Pers. šiyav- "to go forth, set," ašiyavam "I set forth;" cf. Skt. cyu- "to move to and fro, shake about; to stir," cyávate "stirs himself, goes;" Gk. kinein "to move;" Goth. haitan "call, be called;" O.E. hatan "command, call;" PIE base *kei- "to move to and fro."

multiplication
  بستایش   
bastâyeš

Fr.: multiplication   

In general, the process of repeatedly adding a quantity to itself a certain number of times, or any other process which has the same result.

Verbal noun of → multiply.

multiplication sign
  نشانه‌ی ِ بستایش   
nešâne-ye bastâyeš

Fr.: croix de multiplication   

The sign used to indicate multiplication, either a times sign (×), a centered dot (·), or an asterisk. The multiplication sign was introduced by William Oughtred in 1631.

multiplication; → sign.

multiplicative
  بستایشی   
bastâyeši

Fr.: multiplicatif   

Involving → multiplication.

From multiplicate, → multiply, + → -ive.

multiplicative identity
  ایدانی ِ بستایشی   
idâni-ye bastâyeši

Fr.: identité multiplicative   

The number which when used as the multiplier of another number leaves the second unchanged; one.

multiplicative; → identity.

multiplicative inverse
  وارون ِ بستایشی   
vârun-e bastâyeši

Fr.: inverse multiplicative   

The number which when used as a multiplier of another number (except 0) produces 1. For example (1/5) x 5 = 1; each of the numbers is the multiplicative inverse of the other.

multiplicative; → inverse.

multiplicity
  بستاییگی   
bastâyigi

Fr.: multiplicité   

1) The state of being multiple, made of several components.
2) In atomic and nuclear physics, the number of → levels into which the energy of an atom, molecule, or nucleus splits as a result of → Russell-Saunders coupling between → orbital angular momentum and → spin angular momentum. It is given by 2S+1, where S is the total electron → spin quantum number. The multiplicity of an energy level is indicated by a left superscript to the value of L, where L is the resultant electron orbital angular momentum of the individual electron orbital angular momenta.
3) In → statistical mechanics, the number of → microstates corresponding to a given → macrostate.

multiple; → -ity.

multiplier
  بستاگر   
bastâgar

Fr.: multiplicateur   

Arithmetic: A number by which another is multiplied. Physics: A device for intensifying some effect.

Agent noun of → multiply.

multiply
  بستاییدن   
bastâyidan

Fr.: multiplier   

To make many or manifold; increase the number, quantity, etc., of.
Arithmetic: To find the product of by multiplication.

O.Fr. multiplier, from L. multiplicare "to increase," from multiplex (gen. multiplicis) "having many folds, many times as great in number," from multi- "many" + base of plicare "to lay, fold, twist."

Bastâyidan, from bastâ, → multiple, + -idan infinitive suffix.

multipole
  بس‌قطبه   
basqotbé

Fr.: multipôle   

An entity consisting of several poles.

multi-; → pole.

multipole index
  دیشن ِ بس‌قطبه   
dišan-e basqotbé

Fr.: indice multipolaire   

A variable used in → spherical harmonic expansions. Each spherical harmonic is characterized by its multipole index l: l = 0 for a → monopole, l = 1 for a → dipole, and so on. It is used in particular to describe the → cosmic microwave background anisotropy: ΔT/T0 (θ,φ) = Σ almYlm(θ,φ), where θ and φ are the → spherical polar coordinates, Ylm is the → spherical harmonic functions, and the sum runs over l = 1, 2, ..., ∞ and m = -l, ..., l, where the multipole index l corresponds to angular scales ≅ 180°/l.

multipole; → index.

multipole moment
  گشتاور ِ بس‌قطبه   
gaštâvar-e basqotbé

Fr.: moment multipolaire   

The quantity that gives the electric potential field due to a distribution of charges, such as a → dipole, → quadrupole, → octupole, etc. A multipole moment usually involves powers of the distance to the origin, as well as some angular dependence.

multi-; → pole; → moment.

multitude
  بسینه   
basiné

Fr.: multitude   

1) A great number.
2) A great number of people gathered together; crowd; throng.
3) The state or character of being many; numerousness.

M.E., from O.Fr. multitude and directly from L. multitudo "a great number, a crowd; the common people," from multus "many, much," → multi-, + suffix -tudo "-tude."

Basiné, from basin + superlative of bas "many, much," → multi-, + suffix -in + noun/nuance suffix (as bišiné, kaminé, etc.).

multivariate
  بسورتا   
basvartâ

Fr.: multivarié   

Statistics: Having more than one → variable.

multi-; → variate.

multivariate time series
  سری ِ زمانی ِ بسورتا   
seri-ye zamâni-ye basvartâ

Fr.: série temporelle multivariée   

A → time series consisting of two or more → univariate time series which share the same time period. As an example, if we record wind velocity and wind direction at the same instant of time, we have a multi-variate time series, specifically a bivariate one.

multivariate; → time; → series.

multiverse
  گیتی‌گان   
gitigân

Fr.: multivers   

A → hypothetical set of → multiple universes, including our → Universe, that together comprise all of physical reality.

Initially coined by William James (1895) "an alternative to universe meant to convey absence of order and unity." In modern cosmology coined from -verse in → universe, by replacing uni- with multi- to denote "multiple universes."

Gitigân, from giti, → universe, + -gân multiplicity suffix.

multiwire proportional chamber
  اتاقک ِ بسیار-سیم ِ برپارشی   
otâqak-e besyâr-sim-e barpâreši

Fr.: chambre proportionnelle multifils   

Same as → Charpak's detector.

multi-; → wire; → proportional; → chamber.

muon
  موءون   
muon (#)

Fr.: muon   

A short-lived → elementary particle with negative → electric charge, represented by the symbol μ-. The muon was discovered in 1936 by Carl Anderson (1905-1991) in → cosmic rays. It shares several properties with the electron: it is a → lepton with the same charge and → spin as the electron. But it is heavier than the electron (105 MeV/c2), about 200 times more massive. The muon is instable and decays after 2.197 × 10-6 s into → electron, → neutrino, and → antineutrino-e- + νμ + anti νe) .

A shortening of mu meson, from mu the 12th letter of the Gk. alphabet, + → meson.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara arc Ari arr Asi ass ast ast asy atm ato att aut ave axi Bab bal ban bar bar bea Bel Bes bia Big bin bin bip Bla bla bli blu Boh Bon bos Bou bra bri bro bur cal cal can Cap car Car cat Cau cea Cen cen cha Cha cha che chi chr cir cir civ cla clo clo CMB 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 cop Cor CoR cor cos cos Cou cou CP- cre cri cro cub cur cya Cyg dan dar dau de- deb dec dec dee def deg del den den dep des deu dew dia dif dif dih dip dir dis dis dis dis dis diu doc dop dou DQ dry dus dwa dyn Dys 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 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 Hul 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 ion Irr iso iso iso Jal JHK Jul jur Kel Kep kin kne L d Lag lam Lap lar lat law Lea len lep lib lig lin lin lin liq lit loc log lon Los low lum lun Lut Lyr mac mag mag mag mag mag maj man Mar mas mas mat Max mea mec mel Mer Mes met met met mic mid Mil min mir mix mod mod mol mon mor mov mul muo mys nan nat Nav nec nep neu new New NGC Noa nom non non nor not nuc nuc num nyc obj obs obs oce odd OH Omi Oor 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 per pha phl pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre pre pri pri pro pro pro pro pro pro pro pse pul pur qua qua qua qua qui rad rad rad rad rad rad raf ran rar ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret rev ric rig rin roc ROS rot Rox rus Sad sal sat sca sca Sch sci scy sec sec see sel sem 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 Sty sub sub suc sun sup sup sup sup sur Swa syn syn tac tas tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru tum tur TY Typ ult una und uni uni uno upp urg UX Van var veg vel ver vib vio vir vis Voi vow wan wat wav WC wea wel whi Wil wir WNh wor X-r yel ytt zer zon > >>