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: 12955 Search : far
chasma
  کرز   
karz

Fr.: chasme   

In astrogeology, long, narrow, steep sided depressions on planets and Moon, for example, Melas Chasma and Candor Chasma on Mars.

L. chasma, from Gk. khasma "yawning hollow, gulf," related to khaskein "to yawn," and thus to → chaos (1).

Karz "big fissure in a mountain," from Qâeni dialect.

Chelyabinsk meteor
  شهاب ِ چلیابینسک   
šahâb-e Chelyabinsk

Fr.: météore de Tcheliabinsk   

A → meteor exploded on February 15, 2013 over Chelyabinsk, southern Russia.The explosion occurred at a height of 20 km above Earth, releasing 500 kilotons → TNT equivalent of energy, approximately 30 times the yield of the nuclear bomb over Hiroshima. It caused a → shock wave that damaged 7,200 buildings in six Russian cities and injured some 1,500 people, mainly from flying glass. Later, about five tons of meteoritic material reached the ground, including a 650 kg → meteorite that was recovered by divers from the bottom of Lake Chebarkul, on the slopes of the southern Ural mountains. With an estimated initial mass of about 12,000-13,000 metric tons, and measuring about 20 m in diameter, it is the largest known natural object to have entered Earth's atmosphere since the 1908 → Tunguska event.

Chelyabinsk, a city in Russia, the capital of the Chelyabinsk region, on the eastern slope of the Ural Mountains on the Miass River, 200 km south of Ekaterinburg and 1,879 km east of Moscow. The population of Chelyabinsk is about 1,183,000 (2015), the area, 530 sq. km; → meteor.

chemi-
  شیمی-   
šimi- (#)

Fr.: chimi-   

A combining form meaning "chemical, chemically induced, chemistry," used in the formation of compound terms like → chemosynthesis. Also chem- (before a vowel) and chemo-.

Chemi- extracted from → chemical or → chemistry.

chemical
  شیمیایی، شیمیک   
šimiyâyi (#), šimik

Fr.: chimique   

Of, relating to, used in, or produced by means of chemistry.

From chemic "of alchemy," → chemistry + → -al.

Šimiyâyi, of or pertaining to šimichemistry.
Šimik, from šim- + -ik, → -ic.

chemical abundance
  فراوانی ِ شیمیایی   
farâvâni-ye šimiyâyi (#)

Fr.: abondance chimique   

The relative amount of a given → chemical element or → chemical compound with respect to another element or compound in a given sample.

chemical; → abundance.

chemical adsorption
  برشم ِ شیمیایی   
baršam-e šimiyâyi

Fr.: adsorption chimique   

Same as → chemisorption.

chemical; → adsorption.

chemical affinity
  کرونی ِ شیمیایی، ~ شیمیک   
karvani-ye šimiyâyi, ~ šimik

Fr.: affinité chimique   

The extent to which a chemical species, such as an atom or molecule, tends to combine with another to form a chemical compound.

chemical; → affinity.

chemical bond
  بند ِ شیمیک، ~ شیمیایی   
band-e šimik, ~ šimiyâyi

Fr.: liaison chimique   

A force by which chemical substances are held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons.

chemical; → bond.

chemical composition
  همنهش ِ شیمیک   
hamneheš-e šimik

Fr.: composition chimique   

The identities, and relative abundances of the → chemical elements or → compounds that make up a substance.

chemical; → composition.

chemical compound
  همنات ِ شیمیایی   
hamnât-e šimiyâyi

Fr.: composé chimique   

A substance whose molecules are made up of atoms of at least two different elements.

chemical; → compound.

chemical element
  بن‌پار ِ شیمیایی، عنصر ِ ~   
bonpâr-e šimiyâyi (#), onsor-e ~ (#)

Fr.: élément chimique   

A substance which consists entirely of atoms of the same → atomic number and cannot be decomposed or changed into another substance using chemical means. Currently 118 chemical elements are known, the most abundant being → hydrogen. → periodic table.

chemical; → element.

chemical enrichment
  پرداری ِ شیمیایی   
pordâri-ye šimiyâyi

Fr.: enrichissement chimique   

The → process by which the relative → abundance of a given → chemical element or → species in an → astrophysical object is increased. For example the the → increase of the → heavy element content of the → interstellar medium due to → stellar evolution.

chemical; → enrichment.

chemical equation
  هموگش ِ شیمیایی   
hamugeš-e šimiyâyi

Fr.: équation chimique   

The symbolic representation of a chemical reaction where the formulae of the → reactants are placed on the left and the formulae of → products on the right of an arrow.

chemical; → equation.

chemical evolution
  فرگشت ِ شیمیایی   
fargašt-e šimiyâyi (#)

Fr.: évolution chimique   

A cumulative change in the chemical properties, or more specifically, the relative abundances of chemical elements in an astrophysical system.

chemical; → evolution.

chemical mixing
  آمیزش ِ شیمیایی، ~ شیمیک   
âmizeš-e šimiyâyi, ~ šimik

Fr.: mélange chimique   

mixing process.

chemical; → mixing.

chemical potential
  توند ِ شیمیک   
tavand-e šimik

Fr.: potentiel chimique   

For a given component in a → gas mixture, the change in → Gibbs free energy (G) with respect to change in amount of the component (n), when pressure, temperature, and amounts of other components remain constant: ∂G/∂n. Components are in equilibrium if their chemical potentials are equal.

chemical; → potential.

chemical reaction
  واژیرش ِ شیمیایی، واکنش ِ ~   
vâžireš-e šimiyâyi, vâkoneš-e ~

Fr.: réaction chimique   

A → change or → transformation in which a → substance → decomposes, → combines with other → substances, or interchanges constituents with other substances.

chemical; → reaction.

chemical separation
  جدایی ِ شیمیایی   
jodâyi-ye šimiyâyi

Fr.: séparation chimique   

The physical processes that can cause certain elements to migrate in a → stellar atmosphere. These processes are thought to be important in creating the chemical peculiarities seen in → Am stars and → Ap stars.

chemical; → separation.

chemical species
  آرز ِ شیمییایی   
âraz-e šimiyâyi

Fr.: espèce chimiique   

A set of chemically → identical  → atomic or → molecular entities.

chemical; → species.

chemically peculiar star
  ستاره‌ی ِ شیمیکانه افد   
setâre-ye šimikâné afd

Fr.: étoile chimiquement particulière   

A → main sequence star of → spectral type A or B (→ A-type star, → B-type star) identified by the presence of anomalously strong or weak → absorption lines of certain elements in their spectra. CP stars have been divided into four main classes on the basis of their spectra: 1) non-magnetic metallic-lined (CP1, → Am star), magnetic (CP2, → Ap star), non-magnetic mercury-manganese (CP3, → HgMn star), and helium-weak (CP4, → He-weak star).
See also → Ap/Bp stars.

chemical; → -ly; → peculiar; → star.

<< < -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 diu dog Dop dou Dra dua dus dwa dyn e-f Ear ecl eco edu eig Ein ela ele ele ele Ele elo emi emp ene Enl env epi equ equ Eri est Euc eva evo exc exc exh Exo exp exp ext ext f(R fac fam fat fee Fer Fib fig fin fir fix fle flu foc for for for fra fre Fre fri fun fuz Gal gal gal Gam gau Gay gen Geo geo geo geo gim glo gov gra gra gra gra gre gro Gun hab hal han Har haz hea hel hel Hen Her het Hig hil hol Hoo hor hou Hub hum hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind Ind inf inf inf inf inn ins ins int int int int int int int int inv ion ion Irr iso iso iso jan jit Jul jus Kel ker kin kni La lam lan Lap las lat Lay Led Len let lif lig lin lin lin liq Lit loc log lon lou low lum lun Lym M d Mag mag mag mag mag mag maj man mar mas mas mat mea mea mec mem mer Mes met met mho mic Mie Mil min mis MKS MOd mol Mon moo mot mul mul myo nak Nas nat neb neg neu neu New New nit noi non non nor nor nuc nuc nul nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi pai Pan par par Par par pas Pav Pel per per per per Per per pha phi pho pho pho phy Pip Pla pla PLA pla ple plu pol pol pol pol pop pos pos pot Pra pre pre pre Pri pri pri pro pro pro pro pro pro pro Pto pul pur qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea rea rec rec red red ref ref reg rel rel rel rep res res res res ret RHB rid rig ris roc Ros rot rub Rut Sag sam sat sca sca Sch sci Sea sec sec see sel sem sen set Sha sha shi shu sid sil sim sin SIS ski Slo smo Soc sol sol sol sol son sou spa spa spe spe spe sph spi spi Spo 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 tel tem ter tes the the the the Tho thr tid tim Tit top tot tra tra TRA tra tre tri tri tru Tun Tus tym Typ ult unb und uni uni uns upp Urs vac van var Vei Ven ver vic Vir vir vis vol W 4 war wat wav wea wed wet wid win WN2 Wol wri xen yok zen zin > >>