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: 647
edge
  ۱) لبه؛ ۲) تیغه   
1) labé (#); 2) tiqé (#)

Fr.: 1) bord; 2) tranchant, fil   

1) A line or border at which a surface terminates.
2) The thin, sharp side of the blade of a cutting instrument or weapon (Dictionary.com).
3) In → graph theory, any line in a → graph that joins two distinct → nodes. Any pair of → vertices.

M.E. egge; O.E. ecg "corner, edge;" cf. Ger. Eck "corner;" PIE base *ak- "sharp, pointed" (cf. L. acies; Gk. akis "point").

1) Labé "limb, edge," from lab "lip;" Mid.Pers. lap; cognate with L. labium; E. lip; Ger. Lefze.
2) Tiqé "blade of a knife or sword," from tiq "blade," tiz "sharp," variants tig, tež, tej, tij; Mid.Pers. tigr, têz, têž "sharp," O.Pers. tigra- "pointed," tigra.xauda- "pointed helmet (epithet of Scythians);" Av. tiγra- "pointed," tiγray- "arrow," tiži.arštay- "with the pointed spear," cf. Skt. tikta- "sharp, pungent, bitter," tejas- "sharpness, edge, point or top of a flame;" PIE base *st(e)ig- "to stick; pointed." Cognates in other IE languages: Gk. stizein "to prick, puncture," stigma "mark made by a pointed instrument," L. in-stigare "to goad," O.H.G. stehhan, Ger. stechen "to stab, prick," Du. stecken, O.E. sticca "rod, twig, spoon," E. stick.

edge-on galaxy
  کهکشان ِ پهلونما   
kahkašân-e pahlunemâ

Fr.: galaxie vue par la tranche   

A → spiral galaxy oriented edge-on to our view. → face-on galaxy.

edge; on, from O.E. on, variant of an "in, on, into" (cf. Du. aan; Ger. an; Goth. ana "on, upon"), from PIE base *ano "on" (cf. Av. ana "on;" Gk. ana "on, upon;" L. an-); → galaxy.

Kahkašân, → galaxy; pahlunemâ "showing the side," from pahlu, → side, + nemâ, from nemudan "to show, display," → display.

edit
  ویراستن   
virâstan (#)

Fr.: mettre au point, préparer, éditer   

To modify or prepare for publication or public presentation by checking, improving, cutting, rearranging, etc.

Back formation from editor or from Fr. éditer, or from L. editus, p.p. of edere "bring forth, produce," from → ex- "out," + -dere, combining form of dare "to give," → datum.

Virâstan, from Mid.Pers. virâstan "to arrange, prepare, restore," from prefix vi- "apart, away from, out" (Av. vi-; O.Pers. viy- "apart, away;" cf. Skt. vi- "apart, asunder, away, out;" L. vitare "to avoid, turn aside") + râstan "to arrange, to set in order," → coordinate.

edition
  ۱) ویرایش؛ ۲) ویراست   
1) virâyeš (#); 2) virâst (#)

Fr.: édition   

1) The act or process of editing.
2) A version of anything, printed or not, presented to the public.

Verbal noun of → edit.

editor
  ویراستار   
virâstâr (#)

Fr.: rédacteur, éditeur   

1) A person who edits material for publication or public presentation.
2) A computer program that enables creating and editing text files.

Agent noun of → edit.

editorial
  ویراستال   
virâstâl

Fr.: rédaction, éditorial   

1) An article in a newspaper or other periodical or on a website presenting the opinion of the publisher, writer, or editor.
2) A statement broadcast on radio or television that presents the opinion of the owner, manager, or the like, of the program, station, or channel (Dictionary.com).

editor + -i- + → -al.

educate
  فرهیختن   
farhixtan (#)

Fr.: éduquer   

To give knowledge or develop the faculties and powers of somebody by teaching. instruction.

From L. educatus, p.p. of educare "bring up, rear, educate," from → ex- "out" + ducere "to lead."

Farhixtan, "educate," literally "drawing forward, pulling up;" from far- perfection prefix, → pro-, + hanjidan "to draw," → culture.

education
  فرهیزش   
farhizeš (#)

Fr.: éducation   

The act or process of educating.
The knowledge or abilities gained through being educated.

Verbal noun of → educate.

effect
  ا ُسکر   
oskar

Fr.: effet   

1) Something brought about by a → cause or agent; a result.
2) A scientific law, hypothesis, or phenomenon, such as the → Compton effect, → Coriolis effect, → Doppler effect, → diamond ring effect, → photoelectric effect, and so on.

From O.Fr. effect, from L. effectus "accomplishment, performance," from stem of efficere "to work out, accomplish," from → ex- "out" + facere "to do, to make," from PIE base *dhe- "to put, to do;" cf. Mod.Pers. dâdan "to give," Mid.Pers. dâdan "to give," O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives;" Skt. dadáti "he gives," Gk. didomi "I give," tithenai "to put, set, place;" L. dare "to give, offer;" Rus. delat "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do."

Oskar, from os-, → ex-, + kar-, kardan "to do, make;" Mid.Pers. kardan; O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "he makes;" cf. Skt. kr- "to do, to make," krnoti "he makes, he does," karoti "he makes, he does," karma "act, deed;" PIE base kwer- "to do, to make."

effective
  ا ُسکرمند   
oskarmand

Fr.: effectif   

Actually in operation or in force; concrete; real.

M.E., from L. effectivus "practical," from effect(us), p.p. of efficere, → effect + -ivus "-ive."

Oskarmand, from oskar, → effect + -mand possession suffix.

effective aperture
  دهانه‌ی ِ ا ُسکرمند   
dahâne-ye oskarmand

Fr.: ouverture effective   

Of an antenna, the ratio of the extracted power by the antenna to the power per unit area (power density) in the incident wave.

effective; → aperture.

effective Eddington parameter
  پارامون ِ ادینگتون ِ اسکرمند   
pârâmun-e Eddington-e oskarmand

Fr.: paramètre d'Eddington effectif   

The effective value of the → Eddington parameter in a non-homogeneous system (porous opacity).

effective; → Eddington limit; → parameter.

effective focal length
  درازا‌ی ِ کانونی ِ ا ُسکرمند   
derâzâ-ye kânuni-ye oskarmand

Fr.: longueur focale effective   

The focal length of an imaging system, which consists of several lenses or mirrors.

effective; → focal length.

effective gravity
  گرانی ِ اُسکرمند   
gerâni-ye oskarmand

Fr.: gravité effective   

In a → rotating star, the sum of the → gravity and the → centrifugal acceleration. The effective gravity is a function of the rotation velocity (Ω) and the → colatitude (θ). At the pole (θ = 0°) and the equator (θ = 90°) the effective gravity is radial. See also → total gravity.

effective; → gravity.

effective radius
  شعاع ِ ا ُسکرمند   
šo'â'-e oskarmand

Fr.: rayon effectif   

Of a galaxy, the distance from its center within which half of the total luminosity is included.

effective; → radius.

effective temperature
  دمای ِ ا ُسکرمند   
damâ-ye oskarmand

Fr.: température effective   

A measure of the surface temperature of a star derived from the total emitted energy, assuming that the star is a → blackbody emitter (→ Stefan-Boltzmann law, → Planck's radiation law). See also → brightness temperature; → color temperature.

effective; → temperature.

effectiveness
  اسکرمندی   
oskarmandi

Fr.: effectivité   

The degree to which goals are achieved and the extent to which posed problems are solved. Compare → efficiency.

effective; → -ness.

efficiency
  کارایی   
kârâyi (#)

Fr.: efficacité   

1) The state or quality of being efficient; competence. Compare → effectiveness.
Of a machine, engine, or device, the ratio of the physical quantity which may be stored, transferred, or transformed to the total input quantity.

L efficientia, from efficient-, → effect, + -ia "-y," an E. suffix of adjectives.

Kârâyi, from kârâ "efficient," from kâr, → work + â present stem of âmadan "to come," from Av. ay- "to go, to come," aēiti "goes," O.Pers. aitiy "goes," Skt. e- "to come near," eti "arrival," Gk. eimi "I go," L. eo "I go," Tokharian AB i-; PIE *ei- "to go, to walk."

efflux
  زشار   
zošâr

Fr.: efflux   

Outward flow of a → liquid. Something that → flows out.

L. effluxus, p.p. of effluere "to flow out," from → ex- "out" + fluere "to flow," → flux.

Zošâr, from zo- "out of, from," → ex-, + šâr, → flux.

egress
  اسگام   
osgâm

Fr.: émersion   

The reappearance of a celestial body after an eclipse, an occultation, or a transit; same as emersion. → ingress.

From L. egressus, from egredi "to go out," from → ex- "out" + -gredi, comb. form of gradi "to walk, go, step;" from PIE *ghredh- (cf. Lith. gridiju "to go, wander," O.C.S. gredo "to come").

Osgâm "going out," from os- "out," → ex-, + gâm "step, pace," Mid.Pers. gâm, O.Pers. gam- "to come; to go," Av. gam- "to come; to go," jamaiti "goes," Mod.Pers. âmadan "to come," Skt. gamati "goes," Gk. bainein "to go, walk, step," L. venire "to come," Tocharian A käm- "to come," O.H.G. queman "to come," E. come; PIE root *gwem- "to go, come."

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