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: 12948 Search : far
meteorite
  شخانه، شهاب‌سنگ، آسمان‌سنگ   
šaxâné (#), šahâbsang (#), âsmânsang (#)

Fr.: météorite   

An object of → extraterrestrial origin that survives entry through the atmosphere to reach the Earth's surface. → Meteors become meteorites if they reach the ground. See also → stony meteorite, → iron meteorite, → stony-iron meteorite, → chondrite, → micrometeorite , → achondrite, → CAI meteorite, → differentiated meteorite, → undifferentiated meteorite, → Hoba meteorite, → Jilin meteorite, → Martian meteorite, → meteorite flux.

From → meteor + -ite a suffix of nouns.

Šaxâné "metor," may be from šaxudan, šaxânidan "to scratch, to thrust, to assail," as the meteor light scratches the dark night.
Šahâbsang, from šahâb, → meteor, + sang, → stone.
Âsmânsang, from âsmân, → sky, + sang, → stone.

meteorite flux
  شار ِ شخانه‌ای   
šâr-e šaxâne-yi

Fr.: flux de météorites   

The total mass of extraterrestrial objects that land on Earth during a given time period. The meteorite flux is currently estimated to be about 107 to 109 kg yr-1. Much of this material is dust-sized objects called → micrometeorites.

meteorite; → flux.

meteoritic
  شخانه‌ای، شهاب‌سنگی   
šaxâne-yi, šahâbsangi (#)

Fr.: météoritique   

Of or pertaining to a → meteorite.

From → meteorite + → -ic.

meteoritic abundance
  فراوانی ِ شخانه‌ای، ~ شهاب‌سنگی   
farâvâni-ye šaxâne-yi, ~ šahânsangi

Fr.: abondance météoritique   

The abundance of a chemical element as derived from meteorites. Meteoritic abundances measured from carbonaceous → CI chondrites are believed to represent → protosolar abundances.

meteoritic; → abundance.

meteoritic impact
  برخورد ِ شخانه‌ای   
barxord-e šaxâne-yi

Fr.: impact météoritique   

A striking of a meteorite against another body, especially the solar system planets or satellites.

meteoritic; → impact.

meteoritics
  شخانیک، شهاب‌سنگ‌شناسی، شهاب‌سنگیک   
šaxânik, šahâbsangšenâsi, šahâbsangik

Fr.: météoritiqu   

The science or study of meteorites.

meteorite + → -ics.

meteoroid
  شخانه‌وار   
šaxânevâr (#)

Fr.: météoroïde   

A solid object in → interplanetary space before it reaches the Earth's atmosphere. Meteoroids are of → silicate and/or → metallic matter having a size from tiniest grains up to that of the smallest → asteroids.

meteor; → -oid.

meteoroid stream
  رابه‌ی ِ شخانه‌وار   
râbeh-ye šaxânevâr

Fr.: courants de météoroïdes   

The meteoroids distributed all along an → orbit and diffused somewhat around it.

meteoroid; → stream.

meteoroid swarm
  غنگ ِ شخانه‌وار   
qang-e šaxânevâr

Fr.: essaim de météoroïdes   

A relatively dense collection of meteoroids at certain spots along some → meteoroid streams.

meteoroid; → swarm.

meteorological observation
  نپاهش ِ هواشناختی   
napâheš-e havâšenâxti

Fr.: observation météorologique   

Evaluation or measurement of one or more meteorological elements.

Meteorological, of or pertaining to → meteorology; → observation.

meteorological observatory
  نپاهشگاه ِ هواشناختی   
nepâhešgâh-e havâšenâxti

Fr.: observatoire météorologique   

A scientific establishment dedicated to making precise and detailed meteorological observations and to studying and forecasting atmospheric phenomena by means of special equipments.

Meteorological, of or pertaining to → meteorology; → observatory.

meteorology
  هواشناسی   
havâšenâsi (#)

Fr.: météorologie   

The study of the physics, chemistry, and dynamics of the Earth's atmosphere, including the related effects at the air-earth boundary over both land and the oceans.

From Gk. meteorologia "discussion of celestial phenomena," from meteoronmeteor + -logia, &rarr-logy.

Havâšenâsi, from havâ "weather, air," → air.

meter
  متر   
metr (#)

Fr.: mètre   

The → SI unit of length; symbol m. It is defined by taking the fixed numerical value of the → speed of light in vacuum, c, to be 299 792 458 when expressed in the unit m/s, where the → second is defined in terms of ΔνCs.

From Fr. mètre, from Gk. metron "measure," from PIE base *me- "to measure" (cf. O.Pers., Av. mā- "to measure;" Skt. mati "measures;" L. metri "to measure").

Metr, loan from Fr.

methane
  متان   
metân (#)

Fr.: méthane   

A colorless, odorless, inflammable gas gas of formula CH4; the simplest hydrocarbon.

From meth- a combining form representing methyl + -ane a suffix used in names of hydrocarbons of the methane or paraffin series.

methanol
  متانول   
metânol (#)

Fr.: méthanol, alcool méthylique   

Alcohol, also known as methyl alcohol, formula CH3OH, formed in small quantities in the oxidation of methane. → methanol maser.

From → methane + -ol a suffix used in the names of chemical derivatives.

methanol maser
  میزر ِ متانول   
meyzer-e metânol

Fr.: maser méthanol   

A maser source in which excited methanol molecules (CH3OH) produce → maser emission. Methanol masers are signposts of the early stages of star formation, many being associated with sources that have not developed an → H II region. There are more than 20 different methanol transitions that have been observed. They are divided into two categories: Class I, excited by collisions, and class II, excited by infrared radiation. The most important class I masers are at a frequency of 44.1 GHz, while he most important class II masers are at a frequency of 6.7 GHz.

methanol; → maser.

method
  روش   
raveš (#)

Fr.: méthode   

A manner or mode of procedure, especially an orderly, logical, or systematic way of instruction, inquiry, investigation, experiment, and so on.

From M.Fr. méthode, from L. methodus "way of teaching or going," from Gk. methodus "scientific inquiry, method of inquiry," originally "following after," from → meta- "after" + hodos "way."

Raveš "mthod," originally "going, walking," from row "going," present stem of raftan "to go, walk;" Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- "to go; to attack" + -eš a suffix of verbal nouns.

method of least squares
  روش ِ کمترین چاروش‌ها   
raveš-e kamtarin cârušhâ

Fr.: méthode des moindres carrés   

A method of fitting a curve to data points so as to minimize the sum of the squares of the distances of the points from the curve.

method; → least squares.

method of small perturbations
  روش ِ پرتورش‌های ِ کوچک   
raveš-e parturešhâ-ye kucak

Fr.: méthode des petites perturbations   

The linearization of the appropriate equations governing a system by the assumption of a steady state, with departures from that steady state limited to small perturbations. Also called perturbation method.

method; → small; → perturbation.

method of successive approximations
  روش ِ نزدینش‌های ِ پیاپی   
raveš-e nazdinešhâ-ye payâpey

Fr.: méthode d'approximations successives   

The solution of an equation or by proceeding from an initial approximation to a series of repeated trial solutions, each depending upon the immediately preceding approximation, in such a manner that the discrepancy between the newest estimated solution and the true solution is systematically reduced.

method; → successive; → approximation.

<< < -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 > >>