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
secretary-general
  دبیر-هروین   
dabir-harvain

Fr.: secrétaire général   

The head or chief administrative officer of a secretariat.

secretary; → general.

section
  سکنج   
sekanj (#)

Fr.: section   

A part that is cut off or separated.
A distinct part or subdivision of anything. → cross section; → intersection

From M.Fr. section, from L. sectionem "a cutting, division," from secare "to cut;" PIE base *sek- "cut" (cf. O.C.S. seko, sesti "to cut," Lith. isekti "to engrave, carve;" O.S. segasna, O.E. sigðe "scythe;" O.E. secg "sword," seax "knife, short sword").

Sekanj "a scraping, shaving, cutting," cognate with Pers. šekast-, šekastan "to break;" Av. skand- "to break," Skt. khand- "to break," khanda- "piece;" Pers. dialect Tabari šag "a special razor used to make incisions in the walls of unripe opium poppies in order to extract the milky sap," may be related to PIE *sek- "cut," as above.

secular
  ۱) دیریاز؛ ۲) گیانه، گیانی؛ گیان‌باور   
1) diryâz; 2) a), b) giyâné, giyâni; c) giyânbâvar

Fr.: 1) séculaire; 2) laïc   

1a) General: Going on from age to age; continuing through long ages.
1b) Astro.: Gradual or taking place over a long period. → secular acceleration; → secular change.
2a) (adj.) Worldly or material rather than spiritual.
2b) (adj.) Not overtly or specifically relating to religion or to a religious body.
2c) (adj. & n.) Relating to or advocating secularism; a layperson.

Secular from O.Fr. seculer, from L.L. sæcularis "of an age, occurring once in an age," from sæculum "age, span of time, generation, the spirit of the age."

1) Diryâz "long lasting, from dir "slowly, tardily; late" (Mid.Pers. dêr, variants dagr, drâz "long;" (Mod.Pers. derâz "long," variant Laki, Kurdi derež); O.Pers. darga- "long;" Av. darəga-, darəγa- "long," drājištəm "longest;" cf. Skt. dirghá- "long (in space and time);" L. longus "long;" Gk. dolikhos "elongated;" O.H.G., Ger. lang; Goth. laggs "long;" PIE base *dlonghos- "long") + yâz present stem of yâzidan "to stretch out the arms; grow up" (Parthian Mid.Pers. y'd "to reach a goal, come to, stretch out;" Av. yat- to reach, take one's place," yaiiata "places," frā-iiatāt "has reached;" cf. Skt. yat- "to be in place, put in place, line up;" PIE base *iet- "to be in place").
2) Giyâné, giyâni from giyân, variant of Mod.Pers. jahân, keyhân, geyhân "world," giti "world, material world, time," Mid.Pers. gêhân "world," gêtig "the material world; wordly," Manichean Mid.Pers. gyh "world," gyh'n "worlds;" Av. gaē&thetaā- "being, world, matter, mankind," gaya- "life, manner of living", root gay- "to live" (present tense jiva-), O.Pers. gaiθā- "live-stock," cognate with Skt. jīv- "to live," jīva- "alive, living;" Gk. bios "life," L. vivus "living, alive," vita "life;" PIE base *gwei- "to live" (cf. O.E. cwic "alive;" O.C.S. zivo "to live;" Lith. gyvas "living, alive;" O.Ir. bethu "life," bith "age, life, world;" Welsh byd "world"). The Pers. words zistan "to live," zendé "alive," zendegi "life," and jân "vital spirit, soul; mind" belong to this family.

secular aberration
  بیراهش ِ دیریاز   
birâheš-e diryâz

Fr.: aberration séculaire   

The smallest component of the aberration of starlight which is caused by the motion of the solar system through space. → annual aberration; → diurnal aberration.

secular; → aberration.

secular acceleration
  شتاب ِ دیریاز   
šetâb-e diryâz

Fr.: accélération séculaire   

The apparent gradual increase in the → Moon's motion in its orbit, as measured relative to → mean solar time. Secular acceleration corresponds to an extremely gradual reduction in the speed of the → Earth's rotation. The slow-down of the Earth's spin comes mainly from → tidal frictions from the Moon. Historically, Edmond Halley (1656-1742) was the first to suggest that the Moon's mean rate of motion relative to the stars was gradually increasing. In 1693, Halley compared eclipses of recent, medieval, and classical Babylonian time, and discovered that the Moon's mean motion had been gradually increasing. Using Lunar Laser Ranging measurement, based on laser reflectors left by the Apollo astronauts on the Moon's surface (1969 to 1972), the secular acceleration is derived to be -25".4 ± 0".1 century 2 (Xu Huaguan et al., 1996, in Earth, Moon and Planets 73, 101). This corresponds to a linear increase of about 3.5 cm yr-1 in the mean Earth-Moon distance.

secular; → acceleration.

secular change
  دگرشد ِ دیریاز، دگرش ِ ~   
degaršod-e diryâz, degareš-e ~

Fr.: changement séculaire   

A continuous, non-periodic change in one of the attributes of the states of a system. Often, a change in an orbit due to dissipation of energy. See also → canonical change.

secular; → change.

secular instability
  ناپایداری ِ دیریاز   
nâpâydâri-ye diryâz

Fr.: instabilité séculaire   

Instability caused by a slow dissipation of energy.

secular; → instability.

secular parallax
  دیدگشت ِ دیریاز   
didgašt-e diryâz

Fr.: parallaxe séculaire   

The angle subtended at a star by a baseline that is the distance the Sun moves in a given interval of time with respect to the local standard of rest (4.09 AU per year).

secular; → parallax.

secular perturbation
  پرتورش ِ دیریاز   
partureš-e diryâz

Fr.: perturbation séculaire   

A variation of planetary orbital elements which is always in the same direction as time increases.

secular; → perturbation.

secular stability
  پایداری ِ دیریاز   
pâydâri-ye diryâz

Fr.: stabilité séculaire   

1) The condition in which the equilibrium configuration of a system is stable over long periods of time.
2) The condition of a star when it is stable against arbitrary adiabatic perturbations.

secular; → stability.

secular term
  ترم ِ دیریاز   
tarm-e diryâz

Fr.: terme séculaire   

In perturbation theory used in celestial mechanics, a steadily increasing disturbance. → periodic term.

secular; → term.

secular variation
  ورتش ِ دیریاز   
varteš-e diryâz

Fr.: variation séculaire   

Same as → secular perturbation.

secular; → variation.

secularism
  گیان‌باوری   
giyânbâvari

Fr.: laïcité   

The view that religious considerations should be excluded from civil affairs or public education.

secular.

secularization
  گیانش   
giyâneš

Fr.: laïcisation   

The process of organizing society or aspects of social life around non-religious values or principles.

Verbal noun of secularize "giyânidan" (گیانیدن); → secular

secure
  ۱) زیله؛ ۲) زیلیدن   
1) zilé; 2) zilidan

Fr.: 1) sécurisé, en sécurité, sûr; 2) obtenir, fixer, attacher   

1) Free from or not exposed to danger or harm; safe.
2) To get hold or possession of; procure; obtain.

From L. securus "free from care, quiet, easy," also "careless, reckless;" of things, "free from danger, safe," from *se cura, from se "without, free from," + cura, → care.

Zilé, from Tabari zil, zilé "firm, fixed," zil hâkerdan "to fix, fasten," of unknown origin.

security
  زیلگی   
zilegi

Fr.: sécurité   

1) Freedom from care, anxiety, or doubt; well-founded confidence.
2) Something that secures or makes safe; protection; defense.
3) A department or organization responsible for protection or safety (Dictionary.com).

secure; → -ity.

SED fitting
  سزکرد با SED   
sazkard bâ SED

Fr.: ajustement par distribution de l'énergie spectrale   

A technique that uses → spectral energy distribution results from models to reproduce observational data.

spectral energy distribution; → fitting.

sediment
  نهشت   
nehešt (#)

Fr.: sédiment   

Mineral or organic material which has been transported and deposited by an agent of erosion such as water, wind, and ice.

From Fr. sédiment, from L. sedimentum "a settling, sinking down," from stem of sedere "to settle, sit"

Nehešt past stem of neheštan "to place, deposit," from ne- "down, below," → ni- (PIE), + heštan "to place, put" from Mid.Pers. hištan, hilidan "to let, set, leave, abandon;" Parthian Mid.Pers. hyrz; O.Pers. hard- "to send forth," ava.hard- "to abandon;" Av. harəz- "to discharge, send out; to filter," hərəzaiti "releases, shoots;" cf. Skt. srj- "to let go or fly, throw, cast, emit, put forth;" Pali sajati "to let loose, send forth."

sedimentary
  نهشتی   
nehešti (#)

Fr.: sédimentaire   

Of, pertaining to, or of the nature of sediment.

Adj. of → sediment.

sedimentary rock
  سنگ ِ نهشتی   
sang-e nehešti

Fr.: roche sédimentaire   

A rock composed of materials that were transported to their present position by wind or water. → Sandstone, → shale, and → limestone are sedimentary rocks.

sedimentary; → rock.

<< < -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 > >>