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: 13176 Search : in
attendee
  آتانگر، پارگرتنده   
âtângar, pârgertandé

Fr.: participant   

A person who is present at a specific time or place.

From → attend + suffix -ee

Âtângar agent noun from → attend; pârgertandé agent noun from pârgertidan, → participate.

attention
  آتانش   
âtâneš

Fr.: attention   

1) The act or faculty of attending, especially by directing the mind to an object.
2) Observant care; consideration (Dictionary.com).

attend; → -tion.

attentive
  آتانمند   
âtânmand

Fr.: attentif   

1) Characterized by or giving attention; observant.
2) Thoughtful of others; considerate; polite; courteous (Dictionary.com).

attend; → -ive.

attenuate
  تنکیدن   
tonokidan (#)

Fr.: atténuer   

1) To reduce in force, value, amount, or degree. → attenuation, → attenuation factor.
2) To reduce the amplitude of an electrical signal with little or no distortion.

L. attenuatus, p.p. of attenuare "to make thin," from → ad- "to" + tenuare "make thin," from tenuis "thin;" cf. Gk. tanaos "thin, slender, elongated;" Skt. tanuka-, tanu- "thin;" Av. tan- "to stretch;" Pers. tonok "thin," as below; O.Ir. tanae "delicate, thin;" O.H.G. dunni "thin."

Tonokidan, from tonok "thin, slender, slight, tender, delicate" + -idan, infinitive suffix. Tonok, from Mid.Pers. tanuk, Av. root tan- "to stretch, extend," cognate with L. tenuis, as above.

attenuation
  تنکش   
tonokeš (#)

Fr.: atténuation   

The falling off of the energy density of radiation with distance from the source, or with passage through an absorbing or scattering medium.

Verbal noun of → attenuate.

attenuation coefficient
  همگر ِ تنکش   
hamgar-e tonokeš

Fr.: coefficient d'bsorption   

The fraction of a beam of → X-rays or → gamma rays that is absorbed or scattered per unit thickness of the → absorber. The linear attenuation coefficient, denoted by the symbol μ, appears in the equation I(x) = I0ex, where I(x) is the intensity at depth of x cm and I0 is the original intensity.

attenuation; → coefficient.

attenuation factor
  کروند ِ تنکش   
karvand-e tonokeš

Fr.: facteur d'atténuation   

The ratio of the radiation intensity after traversing a layer of matter to its intensity before.

attenuation; → factor.

attitude
  رویکرد   
ruykard (#)

Fr.: attitude   

Position of a satellite with respect to the horizon or some other fixed reference plane.

Fr., from It. attitudine "disposition, posture," from L.L. aptitudo "faculty."

Ruykard, noun from ruy kardan "to turn the face toward," from ruy "face" (Mid.Pers. rôy, rôdh "face," Av. raoδa- "growth," in plural "appearance," from raod- "to grow, sprout, shoot," cf. Skt. róha- "rising, height") + kardan "to do, make, perform" (Mid.Pers. kardan, O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "makes," cf. Skt. kr- "to do, to make," krnoti "makes," karma "act, deed;" PIE base kwer- "to do, to make").

position.

atto-
  اتو-   
atto-

Fr.: atto-   

A prefix meaning 10-18.

From Danish or Norwegian atten "eighteen," from O.N. attjan "eighteen," from atta "eight" (compare with Gk. okto, L. octo, Skt. astau, Av. ašta-, Mod.Pers. hašt; PIE *okt(u)) + tjan "ten" (compare with Skt. dasa, Av. dasa, Mod.Pers. dah, Gk. deka, L. decem; PIE *dekm).

attract
  درکشیدن   
darkašidan (#)

Fr.: attirer   

To cause to draw near or adhere by physical force.

L. attractus, p.p. of attrahere "to draw, to attract," from ad- "to" + trahere "to pull, draw."

Darkašidan, from dar- "in, into" + kašidan "to draw, attract," → galaxy.

attraction
  درکشش   
darkašeš

Fr.: attraction   

The act or capability of attracting. A physical force (gravitational, electric, magnetic, etc.) exerted by material bodies.

Attraction, n. from → attract.

attractive
  درکشنده   
darkašandé (#)

Fr.: attractif   

Having the quality of attracting.

Verbal adj. from → attract.

attractive force
  نیروی ِ درکشنده   
niru-ye darkašandé

Fr.: force attractive   

A physical force (→ gravitational, → electric, → magnetic, etc.) by which a body attracts another.

attractive; → force.

attractor
  درکشنده   
darkašandé

Fr.: attracteur   

The physical body that attracts. → Great Attractor.

attract; → -or.

attribute
  ۱) آباژ، آباژه؛ ۲) آباژیدن   
1, 2) âbâž, âbâžé; 3) âbâžidan

Fr.: 1, 2) attribut; 3) attribuer   

1) General: Something attributed as belonging to a person, thing, or group; a quality, characteristic, or property.
2) Computer science: A characteristic that describes an → entity.
3) To explain as resulting from a specified cause; to regard as caused by something indicated.

M.E., from L. attributus, p.p. of attribuere "to assign to, add, bestow;" figuratively "to attribute, ascribe, impute," from → ad- "to" + tribuere "to pay, assign, give, bestow," → distribute.

Âbâž, âbâžé, from â- strength or nuance prefix + bâž "tribute, toll, impost," → distribute.

attribution
  آباژش   
âbâžeš

Fr.: attribution   

1) The act of attributing.
2) Something attributed.

Verbal noun of → attribute.

aubrite
  اُبریت   
obrit

Fr.: aubrite   

A type of → achondrite meteorite composed mostly of the magnesium silicate mineral → enstatite (Mg2Si2O6). The group is named for the small Aubres → meteorite that fell near Nyons, France, on Sep. 14, 1836. Outside Antarctica only about 10 aubrites are known, mostly the result of witnessed falls. Aubrites make up only 0.14% of all known meteorites in our terrestrial meteorite collection.

From Fr. Aubres, a commune in the Drôme department in southeastern France; + → -ite.

Auger electron
  الکترون ِ اژه   
elektron-e Auger

Fr.: électron d'Auger   

An electron that is emitted when an electron from a higher → energy level falls into a → vacancy in an inner shell, according to the → Auger-Meitner effect. The process usually occurs when the atom is bombarded with high energy electrons. If the collision ejects an inner-shell electron, an electron from a higher level will quickly drop to this lower level to fill the vacancy. Most of the time, the energy is released in the form of a photon. But sometimes the energy is transferred to another electron, which is ejected from the atom.

Auger-Meitner effect; → electron.

Auger-Meitner effect
  اسکر ِ اژه-مایتنر   
oskar-e Auger-Meitner

Fr.: effet Auger-Meitner   

The → emission of an → electron when an → atom transits to a less → excited state. More specifically, → ionization of an atom by a very energetic photon can bring about the ejection of an inner electron of the atom. Consequently, the atom becomes unstable and rapidly undergoes a → spontaneous transition. As a result, an outer electron moves inward and fills the → vacancy produced in the inner orbit. Energy conservation requires that this transition be accompanied by the emission of a photon or a peripheral electron. The latter is called the → Auger electron. Knowing the electron energy leads us to characterize the atom from which it was ejected. This effect is used, in the Auger spectroscopy, to analyze the surface compositions of materials.

This effect was discovered in 1923 Lise Meitner (1878-1968) and in 1925 independently by Pierre Auger (1899-1993).

Auriga
  ارابه‌ران، گردونه‌ران   
Arrâbe-rân, Gardune-rân

Fr.: Cocher   

The Charioteer. A conspicuous northern constellation lying midway between → Perseus and → Ursa Major and in a region crossed by the → Milky Way. The brightest star is → Capella. Auriga is the site of the Galactic → anticenter. Abbreviation: Aur; genitive form: Aurigae.

L. auriga "a charioteer, driver," from aureæ "bridle of a horse" + agere "set in motion, drive, lead."

Arrâberân "charioteer," from arrâbé "chariot, cart" + rân "driver," from rândan "to drive." Arrâbé probably from *arâba, from *râba, from *râda, compare with Av. ratha- "chariot," akin to Skt. rathah "car, chariot," L. rota "wheel," rotare "revolve, roll," Lith. ratas "wheel," O.H.G. rad, Ger. Rad, Du. rad, O.Ir. roth; PIE *roto- "to run, to turn, to roll."
Gardunerân "a charioteer," from garduné "chariot, car," from gardun "wheel; heaven," from gardidan "to turn, revolve."

<< < -es -it -sc 201 951 abe abs abs aca acc acc aco act ada adh ado aer aft air Alf alg alk alp Alt alt amb ana And ang ani ann ant ant ant apo app app Apu arc arg Arn art ass ast ast ast atm ato att aur aut avo azi bac bal bar bar bat Bea Bel bet bia big bin bio Bir bla bla blo Blu bol Boo bou box bre Bri bro bur cal cal Can cap car Car cat cau cel cen cen cha Cha cha che Chi chr cir cir civ cla clo clo CMB 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 coo cor cor cor Cos cos cos cou cou cra cri cro cry cul cur cyc D l dar dat day dea dec dec dec def 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 Dsc dus dwa dyn Dys Ear ecc eco edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ eru eth Eur eve exa exc exe exi exo exp ext ext ext fab fai Fan fea fem fer fie fil fir fir fla fli flu foc for for for fra fre fre fri fun fuz gal gal gal Gam gau Gau gen geo geo geo geo Gib glo gov gra gra gra gra gre gro Gui H-a hal Ham har Hay hea hei hel Hel her het hie hig hoa hom hor hot Hub Hug hur hyd hyd hyl 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 inv ion iro Isl iso iso Jab jet Jov Jup Kar Kep kil Kip Kra Lag Lam Lan Lar las law lea Leg Leo lev lig lim lin lin lin lit loc loc log Lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal map mas mas mat Mau mea mea med Men mer Mes Met met mic mic Mie mil min Mir mix mod mol mom Moo mor mov mul mur n-b nan nat nea neg Ner neu new New NGC noc nom non non nor nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove Owl P-s Pal par par par par Pas pat pec pen per per per per per Pha pha pho pho pho phy pie pix Pla pla pla pla Pli Poi pol pol pol pol por pos pos pow pre pre pre pre pri pri pri pro pro pro pro pro pro pro pub pul pyc 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 ren res res res res ret rev Ric rig rin roc roo rot rot rur S5- Sal sat sca sca Sch sci Scu sec sec sed sel sel sem seq set sha she sho sid sie sil sim sin sit sky slo sno sod sol sol sol sol son sou spa spa spe spe spe spe sph spi spo squ sta sta sta sta ste ste ste Sti sto str str sub sub sub sul sup sup sup sup sur sur syl syn sys tal Tay tel ten ter tex the the the the Tho thr tid tim Tit too Tor tra tra Tra tra Tra tri Tri tru tub tur two Typ ult ult unc uni uni uni upl ura uti val var vec vel ver Ver vie vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>