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: 13048 Search : far
chaotic system
  راژمانِ ورشونگین   
râžmân-e varšungin

Fr.: système chaotique   

A system that is → deterministic through → description by mathematical rules but can evolve highly → nonlinearly depending on → initial conditions. See also → chaos.

chaotic; → system.

chaoticity
  ورشونگینی   
varšungini

Fr.: chaoticité   

The condition of being → chaotic.

chaotic; → -ity.

Chaplygin gas
  گاز ِ چاپلیگین   
gâz-e Chaplygin

Fr.: gaz de Tchaplyguin   

In → dark energy models, a hypothetical fluid that can lead to cosmic acceleration at late times. In its simplest form, the Chaplygin gas has the → equation of statep = - A/ρ, where p and ρ denote the → pressure and → energy density, respectively, and A is a positive model parameter. This equation was introduced by Chaplygin (1904, Sci. Mem. Moscow Univ. Math., 21) to study the lifting force on a plane wing in aerodynamics.

Named after Sergey Chaplygin (1869-1942), Russian physicist; → gas.

Chappuis band
  باند ِ شپویی   
bând-e Chappuis

Fr.: bande de Chappuis   

A band in the → absorption spectrum of → ozone (O3) extending in the → visible from 400 nm to 700 nm. → Hartley band, → Huggins band.

J. Chappuis, Acad. Sci., Paris, C. R. 91, 985 (1880).

character
  ۱) سرشت، سرشتار؛ ۲) سرشتار؛ ۳) دخشه   
1) serešt (#), sereštâr; 2) sereštâr; 3) daxšé (#)

Fr.: 1, 3) caractère; 2) personnage   

1a) The aggregate of features and traits that form the individual nature of some person or thing.
1b) One such feature or trait; characteristic.
2) A person represented in a play, film, story, etc; role. See also → personage (Dictionary.com).
3) Computers: One of a set of symbols, such as letters or numbers, that are arranged to express information; the numerical code representing such a character.

M.E. carecter "distinctive mark," from O.Fr. caractère, from L. character, from Gk. kharakter "graving tool, its mark," from kharassein "to engrave," from kharax "pointed stick."

1, 2) Serešt "nature, temperament, constitution; mixed," sereštan "to mix, mingle; knead;" serišom "glue;" Mid.Pers. srištan "to mix, knead;" cf. Av. ham-sriš- "to put together;" Skt. śres- "to cling, stick, be attached;" Proto-Ir. root *sraiš- "to put together, attach" (Cheung 2007).
Sereštâr with -âr, contraction of âvar agent noun of âvardan "to bring; to cause, produce," → format.
3) Daxšé, variants dâq "a brand, a mark burned on the skin of an animal with a hot iron," Gilaki dajé "a brand," Hamadani daj "sign placed on a heap of harvest indicating identity or ownership," Mid.Pers. daxšag "mark, sign, charactersitic; (monthly) signs (of women)", dazidan "to burn, scorch," Av. daxša- "sign, mark, defect," from dag- "to burn," dažaiti "burns," cf. Skt. dah- "to burn," dahati "burns," Gk. tephra "ash," L. favilla "glowing ashes," Lith. dagas "hot season," O.Prus. dagis "summer," P.Gmc. *dagaz, Ger. Tag, E. day; PIE *dhegwh- "to burn."

characteristic
  ۱) سرشتار؛ ۲) سرشتاری   
1) serežtâr; 2) serežtâri

Fr.: caractéristique   

1a ) A distinguishing feature or quality.
1b) The integer part of a → common logarithm. For example, log10 (23) = 1.362, where the characteristic is 1 and the → mantissa is 0.362.
2) Pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive.

character; → -istic.

characteristic age
  سن ِ سرشتاری   
senn-e sereštâri

Fr.: âge caractéristique   

Of a pulsar, a normalized period of rotation assumed to be a good approximation to pulsar's true age.

characteristic; → age.

characteristic curve
  خم ِ سرشتاری   
xam-e sereštâri

Fr.: courbe caractéristique   

Graph representing an optical film's response to the amount of light falling on it.

characteristic; → curve.

characteristic equation
  هموگش ِ سرشتاری   
hamugeš-e sereštâri

Fr.: équation caractéristique   

Physics: An analytical relationship between a set of physical variables that determines the state of a physical system.
Math.: The equation which is solved to find a matrix's eigenvalues, also called the characteristic polynomial.

characteristic; → equation.

characteristic mass
  جرم ِ سرشتاری   
jerm-e sereštâri

Fr.: masse caractéristique   

A typical or most likely mass for the formation of an astronomical object. In current star formation models, it is of order of a few tenths of a → solar mass.

characteristic; → mass.

characteristic thermal energy
  کاروژ ِ گرمایی ِ سرشتاری   
kâruž-e garmâyi-ye sereštâri

Fr.: énergie thermique caractéristique   

The quantity kT in the → Maxwell-Boltzmann distribution law, where k is → Boltzmann's constant and T the gas temperature. See also → thermal energy.

characteristic; → thermal; → energy

characterization
  ۱) سرشتارش؛ ۲) تنومسا سازی   
1) sereštâreš 2) tanumsâ sâzi

Fr.: 1) caractérisation; 2) représentation des caractères   

1) The act of describing the character or qualities of someone or something.
2) The artistic representation (as in fiction or drama) of human character or motives (Merriam-Webster.com).

characterize; → -tion.

characterize
  سرشتاردن   
sereštârdan

Fr.: caractériser   

1) To mark or distinguish as a characteristic; be a characteristic of.
2) To describe the character or individual quality of.
3) To attribute character to (Dictionary.com).

character; → -ize.

charcoal
  زغال   
zoqâl (#)

Fr.: charbon de bois   

A black amorphous substance produced by heating wood or other natural organic matter in the absence of air. It is used as a fuel.

M.E. charcole, maybe from cherre "char" + cole, → coal.

Zoqâl "live coal, charcoal," variant sokâr; Sogd. askâr; Pashto skor-; Khotanese skara, probably ultimately from Proto-Ir. *uz-gar-, from *uz- "out," → ex-, + *gar "to heat, kindle fire, cook;" cf. Tabari kalə "furnace," kəlen "ash;" Laki koira; Kurd. kulan, kulandan "to cook;" related to garm "warm;" cf. Skt. ghar- "to burn," PIE root *gwher- "to warm, be warm," → warm.

charge
  بار   
bâr (#)

Fr.: charge   

electric charge.

Charge from O.Fr. chargier "load, burden," from L.L. carricare "to load a wagon, cart," from L. carrus "wagon."

Bâr "charge, weight," from Mid.Pers. bâr, from O.Pers./Av. base bar- "to bear, carry," Mod.Pers. bordan "to carry," L. brutus "heavy, dull, stupid, brutish," Skt. bhara- "burden, load," bharati "he carries," Gk. baros "weight," Mod.Pers. gerân "heavy," Skt. guru, L. gravis; PIE *gwere- "heavy," *bher- "carry, give birth."

charge bleeding
  سرریز ِ بار   
sarriz-e bâr

Fr.: étalement de charge   

The heavy saturation of CCD pixels whereby electrons spill over up and down the column; also called blooming.

chrge; bleeding, from Bleed, from O.E. bledan, from P.Gmc. *blothjan "emit blood" (cf. Ger. bluten), from *blotham "blood", PIE root bhel- "to bloom, thirve".

Sarriz "overflow", from sar "head" (Mid.Pers. sar, Av. sarah- "head," Skt. siras- "head," Gk. kara "head," keras "horn," Mod.Pers. sarun "horn," L. cerebrum "brain;" PIE *ker- "head, horn") + riz present stem of rixtan "to pour; to flow; to cast" (Mid.Pers. rēxtan and rēcitan "to flow," Av. raēk- "to leave, set free; to yield, transfer," infinitive *ricyā, Mod.Pers; rig in morderig "heritage" (literally, "left by the dead"), Skt. rinakti "he leaves," riti- "stream; motion, course," L. rivus "stream, brook," Old Church Slavic rēka "river," Rus. reka "river," Goth. rinnan "run, flow," rinno "brook," O.E. ridh "stream;" PIE base *rei- "to flow; to run").

charge carrier
  برنده‌ی ِ بار، باربر   
barande-ye bâr (#), bârbar (#)

Fr.: porteur de charges   

A mobile particle carrying an electric charge. In semiconductors, a mobile electron or hole. Also called carrier.

charge; → carrier.

charge conjugation
  همیوغش ِ بار   
hamyuqeš-e bâr (#)

Fr.: conjugaison de charges   

In particle physics, an operation that changes a particle to its antiparticle in equations describing subatomic particles or, equivalently, reverses its charge and magnetic moment.

charge; → conjugation.

charge density
  چگالی ِ بار   
cagâli-ye bâr

Fr.: densité de charge   

The → electric charge per unit volume in space, or per unit area on a surface, or per unit length of a line. They are respectively called volume- (ρ), surface- (σ), or line (λ) charge density.

charge; → density.

charge distribution
  واباژش ِ بار   
vâbâžeš-e bâr

Fr.: distribution des charges   

The way a number of → electric charges are arranged in space with respect to the point of observation.

charge; → distribution.

<< < -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 ash ass ast ast asy atm ato att aut ave axi Bab bal Bal bar bar bea Bek Bes bia Big bin bin bip biv bla bli blu Boh Bol Bos bou bra bri bro buo cal cal can cap car Car cat cat CCD Cen cen CH cha cha che Che chr cir cir cit 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 con Cop Cor cor cor cos cos cou cou Cow cre cri cro cry cur cya Cyg dan dar dat de- deb dec dec ded def deg del dem den dep des det dev dia dif dif dih dio Dir dis dis dis dis dis dis DO 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 ext fac fal far fed Fer fer fie fin fir fis fla flo flu fol for for fou fra fre Fre fro fut G-t gal gal gam gas Gau Gem gen geo geo geo gia Gli Gol gra gra gra gra gre gri gui H I Hag hal har hat He- hea hel Hel her Hes hie hig his hom hor hot Hub Hug hur hyd hyd hyg hyp ice ide ima Ima imp imp inc inc ind ine inf inf inf ing inn ins ins int int int int int int int int inv Io ion iro isl iso iso Jac jet jud jur Kel Kep kil Klo 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 Meg Mer Mer met met Met mic Mid Mil min Mir mit mod mod mol mon Mor mou mul mul mys nan Nat nau nec neo neu nev New NGC no nom non non nor not nuc nuc num nut obj obs obs occ ocu oft ome Oor ope opp 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 phi pho pho pho phy pio 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 sla Sma sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spi spr squ sta sta sta sta ste ste ste Sto Str str str sub sub suc sun sup sup sup sup sur swa syn syn tab tar tek tem ter tes the the the the Tho thr tid tim Tis Too Tor tra tra Tra tra tra tri tri tru Tul tur two Typ ult un- und uni uni unk upp Urc utt val var vec vel ver vib vio vir vis voi vor wan wat wav wax wea Wei whi Wil win WN9 wor X-r yel you zer zod > >>