An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13048 Search : far
dark nebula
  میغ ِ تاریک   
miq-e târik

Fr.: nébuleuse sombre   

An interstellar cloud of absorbing matter whose dust particles obscure the light from stars beyond it and give the cloud the appearance of a dark, starless region.

dark; → nebula.

dark star
  ستاره‌ی ِ تاریک   
setâre-ye târik

Fr.: étoile noire, ~ sombre   

A hypothetical stellar object whose structure or evolution has been affected by → dark matter. Dark matter models predict that in the → early Universe dark matter (in the form of → WIMPs) should congregate and annihilate in the cores of → Population III stars. The result would be dark stars with properties very different from ordinary stars. The reason is that the presence of large amounts of dark matter during the formation of a star inhibits the collapse and can partially prevent further cooling of the gas beyond a certain critical point, well before a → main sequence object has formed. As a consequence, dark matter stars should be more massive, more luminous, and live longer than Pop. III stars, but would be cooler. The formation of dark stars could have had an impact on the → reionization history of the Universe (see, e.g., P. Scott, 2011, astro-ph/1101.1029, and references therein).

dark; → star.

darken
  تاریکیدن   
târikidan

Fr.: s'assombrir   

To become dark or darker. → darkening.

Verb of → dark.

darkening
  تاریکش   
târikeš

Fr.: assombrissement   

The act or process of becoming dark or darker. → limb darkening.

Verbal noun of of → darken.

data
  داده‌ها   
dâdehâ (#)

Fr.: données   

Items of information.

L. data, plural of → datum.

Dâdehâ, plural of dâdé, → datum.

data access layer (DAL)
  لایه‌ی ِ دسترسی به داده‌ها   
lâye-ye dastrasi bé dâde-hâ

Fr.: couche accès aux données   

In the → software architecture, the code that deals with reading from or writing to the data store, hiding its nature and complexity.

data; → access; → layer.

data acquisition
  الفنجش ِ داده‌ها   
alfanješ-e dâdehâ

Fr.: acquisition de données   

The process of controlling telescope operations during observation and obtaining data.

data; acquisition, from L. acquisitionem, from acquirere "get in addition," from → ad- "extra" + quærere "to search for, obtain."

Alfanješ, verbal noun of alfanjidan (variant alfaqdan) "to acquire, get," Bactrian αλφανζ "to acquire," Sogdian δβ'yz "to acquire, gain, get" (Cheung 2007); → data.

data analysis
  آنالس ِ داده‌ها، آناکاوی ِ ~   
ânâlas-e dadehâ, ânâkâvi-ye ~

Fr.: analyse de données   

The evaluation of reduced data; → data reduction.

data; → analysis.

data archive
  بایگانی ِ داده‌ها   
bâygâni-ye dâdehâ (#)

Fr.: archive de données   

Any extensive record or collection of data, observational (usually obtained with a particular instrument) or theoretical (grid of models usually regarding a particular branch of astrophysics).

data; → archive.

data bank
  بانک ِ داده‌ها، داده بانک   
bânk-e dâdehâ, dâdé bânk (#)

Fr.: banque de données   

A set of data related to a given subject and organized in such a way that it can be consulted by users.

data; bank, from M.Fr. banque, from O.It. banca "table," because of "the moneylender's exchange table," from P.Gmc. *bankiz (O.H.G. bank "bench").

Bânk, from Fr. banque, see above; dâdehâ, plural of dâdédatum.

data mining
  کان‌کاوی ِ داده‌ها، داده کاوی   
kânkâvi-ye dâde-hâ, dâdé kâvi

Fr.: exploration de données   

The process of digging through large quantities of raw data stored in → databases to uncover new characteristics, patterns, and correlations using various automatic or semi-automatic statistical/mathematical means.

data; mining, from mine, M.E., from O.Fr. mine, probably from a Celtic source.

Kânkâvi, literally "digging mine," from kân "mine," related to kandan "to dig" (Mid.Pers. kan, qn; O.Pers. ka(n) "to dig;" Av. kan- "to dig;" cf. Skt. khan- "to dig") + kâvi from kâvidan/kâftan "to split; to dig" (Mid.Pers. kandan "to dig;" cf. Gk. skaptein "to dig;" L. scabere "to scratch, rub").

data model
  مدل ِ داده‌ها   
model-e dâde-hâ

Fr.: modèle de données   

An abstract entity that describes the structure of → database by including the formal description of the information system used in the database.

data; → model.

data number (DN)
  شمار ِ داده‌ها   
šomâr-e dâdehâ

Fr.:   

Unit of the analog-to-digital conversion system of a CCD apparatus. For example a 16 bit system may use a maximum of 65536 DN. The acronym ADU, for analog-to-digital unit, is also used.

data; → number.

data processing
  داده آمایی   
dâdé âmâyi (#)

Fr.: traitement de données   

Systematic operations on data, such as handling, merging, sorting, and computing.

data; → processing.

data processor
  داده آما   
dâdé âmâ (#)

Fr.: processeur de donées   

A machine for handling data in → data processing.

data; → processor.

data reduction
  بازهازش ِ داده‌ها   
bâzhâzeš-e dâdehâ

Fr.: réduction de données   

The process of converting crude observational data into usable information for scientific interpretation, by correcting, rearranging, ordering, and simplifying.

data; → reduction.

data structure
  ساختار ِ داده‌ها   
sâxtâr-e dâdehâ

Fr.: structure de données   

A → method or → format for organizing and storing data. Any data structure is designed to organize data to suit a specific purpose so that it can be accessed and worked with in appropriate ways. In computer programming, a data structure may be selected or designed to store data for the purpose of working on it with various algorithms.

data; → structure.

database
  پایگاه ِ داده‌ها   
pâygâh-e dâdehâ (#)

Fr.: base de données   

A combined and coordinated set of data that supplies information for a specific purpose in a variety of forms.

data; → base.

date
  گاهداد   
gâhdâd

Fr.: date   

A particular day, month, and year at which some event happened or will happen.

Date, from O.Fr. date, from M.L. data, from datus "given," p.p. of dare "to give, grant, offer," from PIE base *do- "to give" (cf. Pers. dâdan "to give," as below). The Roman convention of closing a document by writing "given" and the day and month (meaning "given to messenger") led to data becoming a term for "the time stated."

Gâhdâd, from gâh "time" (Mid.Pers. gâh, gâs "time;" O.Pers. gāθu-; Av. gātav-, gātu- "place, throne, spot;" cf. Skt. gâtu- "going, motion; free space for moving; place of abode;" PIE *gwem- "to go, come") + dâd "given," as in Latin; p.p. of dâdan "to give" (Mid.Pers. dâdan "to give," O.Pers./Av. dā- "to give, grant, yield," Av. dadāiti "he gives," Skt. dadáti "he gives," Gk. didomi "I give;" akin to L. data, as above); cf. Mid.Pers., Mod.Pers. dâd "year, age, period of life," Lori, Laki dâ(d) "age," homdâ "of equal age."
Note: In current Persian a single term, târix (تاریخ), is used for two different but related concepts: date and history. This may be confusing, → history (تاریخ).

dating
  سن‌یابی   
senn yâbi (#)

Fr.: datation   

Use of appropriate techniques to estimate the age of geological specimens or astronomical objects such as meteorites.

Verbal noun of date, from O.Fr. date, from M.L. → data.

Sen yâbi, from Ar. sen "age" + yâbi verbal noun of yâftan, yâbidan "to find, discover; to obtain, acquire," Mid.Pers. ayâftan, ayâpênitan "to reach, attain," Manichean Mid.Pers. 'y'b "to attain," Parthian, Sogdian (+ *pati-) pty'b "to reach, obtain," Av. ap- "to reach, overtake," apayeiti "achieved, reached," Skt. âp- "to reach, gain," âpnoti "reaches, gains," Gk. hapto, haptomai "to touch, cling to, adhere to," L. apiscor "touch, reach;" PIE base *ap- "to take, reach."

<< < -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 > >>