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: 634
electroweak force
  نیروی ِ برقا نزار، ~ برقا کمزور   
niru-ye barqânezâr, ~ barqâkamzur

Fr.: force électrofaible   

The force that takes part in an → electroweak interaction.

electroweak; → force.

electroweak interaction
  اندرژیرش ِ برقانزار   
andaržireš-e barqânezâr

Fr.: interaction électrofaible   

The unified description of two of the four fundamental interactions of nature, → electromagnetism and the → weak interaction which would merge into a single force under conditions of extreme temperature (above 1016 degrees, 102 GeV) prevalent in the early history of the → Universe.

electroweak; → interaction.

electroweak star
  ستاره‌ی ِ برقانزار   
setâre-ye barqânezâr

Fr.: étoile électrofaible   

A postulated type of star that could form toward the end of a → massive star's life, after → nuclear fusion has stopped in its → core, and before the star → collapses into a → black hole. In those → extreme conditions, when → temperature and → density inside the star are very high, → quarks could convert into → leptons. Hence huge amounts of energy can be released, much of which would be in the form of → neutrinos.

electroweak; → star.

elegance
  قشنگی   
qašangi (#)

Fr.: élégance   

Elegance quality; something elegant.

Noun from → elegant.

elegant
  قشنگ   
qašang (#)

Fr.: élégant   

Gracefully refined and dignified, as in tastes, habits, or literary style; graceful in form or movement; excellent; fine; superior (Dictionary.com).

M.E., from M.Fr., from L. elegantem (nominative elegans) "choice, fine, tasteful," from eligere "to select, choose."

Qašang "elegant, nicely fitted up" (Steingass), variant šang; cf. Sogd. xšang "beautiful, magnificient, excellent," maybe related to Av. xšnu- "to entertain, welcome, take care of (a guest)," O.Pers. xšnu- "to be satisfied, glad," Pers. xošnud "satisfied, content."

elegant equation
  هموگش ِ قشنگ   
hamugeš-e qašang

Fr.: équation élégante   

An equation with surprising simplicity that expresses a fundamental result relating several apparently unassociable elements. For example, → Euler's formula for the particular case of θ = π, and the → mass-energy relation.

elegant; → equation.

element
  بن‌پار، عنصر   
bonpâr (#), onsor (#)

Fr.: élément   

1) General: A component or constituent of a whole or one of the parts into which a whole may be resolved by analysis.
2) Astro.: Any of the data required to define the precise nature of an orbit and to determine the position of a planet in the orbit at any given time. → orbital element.
3) Chemistry:: One of the 117 presently known substances that cannot be decomposed by chemical reaction into a simpler substance.
4) Math.:a) Of a cylinder or cone, the generating line of the surface, taken in any position. b) Of a set, any member of the set.

From O.Fr. élément, from L. elementum "rudiment, one of the four elements, first principle," origin unknown.

Bonpâr, from bon "basis; root; foundation; bottom;" Mid.Pers. bun "root; foundation; beginning," Av. būna- "base, depth," cf. Skt. bundha-, budhná- "base, bottom," Pali bunda- "root of tree" + pâr contraction of pâré "piece, part, portion, fragment;" Mid.Pers. pârag "piece, part, portion; gift, offering, bribe;" Av. pāra- "debt," from par- "to remunerate, equalize; to condemn;" PIE *per- "to sell, hand over, distribute; to assign;" cf. L. pars "part, piece, side, share," portio "share, portion;" Gk. peprotai "it has been granted;" Skt. purti- "reward;" Hitt. pars-, parsiya- "to break, crumble." Onsor from Ar.

elemental abundance
  فراوانی ِ بن‌پار، ~ عنصر   
farâvâni-ye bonpâr, ~ onsor

Fr.: abondance élémentaire, ~ d'un élément   

Emission nebulae: The relative amount of a given → chemical element in an ionized nebula with respect to another element, usually → hydrogen. Elemental abundance ratios of → emission nebulae are obtained either by adding the observed → ionic abundances of the element or by using → ionization correction factors. Same as → total abundance.

Elemental, from M.L. elementalis, → element + -al; abundance, from O.Fr. abundance, from L. abundantia "fullness," from abundare "to overflow," from L. ab- "away" + undare "to surge," from unda "water, wave;" → abundance.

elementary particle
  ذره‌ی ِ بنیادین   
zarre-ye bonyâdin (#)

Fr.: particule élémentaire   

A particle which cannot be divided into other constituents. More specifically, a particle whose field appears in the fundamental field equations of the unified field theory of elementary particles, in particular in the Lagrangian. For example, the → electron, the → photon, and the → quark are elementary particles, whereas the proton and neutron are not. The elementary nature of a particle can be revised depending on new observations or theories. Also called → fundamental particle.

Elementary, M.E. elementare, from M.F. élémentaire, from L. elementarius, from → element + adj. suffix -arius; → particle.

Bonyâdin, from bonyâd "basis, foundation," variant of bonlâd, from bon "basis; root; foundation; bottom" → element + lâd "root; foundation; reason, cause; wall" + adj. suffix -in.

elementary time
  زمان ِ بنیادین   
zamân-e bonyâdin

Fr.: temps élémentaire   

The time required for → light to cross the classical radius of the electron (→ electron radius): te = re/c ≅ 10-23 s.

elementary particle; → time.

elements of the orbit
  بن‌پارهای ِ مدار، عنصرهای ~   
bonpârhâ-ye madâr, onsorhâ-ye ~ (#)

Fr.: éléments orbitaux   

orbital element.

element; → orbit.

elephant trunk
  خرطوم ِ فیل   
xortum-e fil

Fr.: trompe d'éléphant   

An elongated structure of → interstellar dust and gas which absorbs the radiation from background stars in an → H II region. These structures are the denser remnants of → molecular clouds from which → massive stars are formed. Elephant trunks are eventually dissipated by the action of the → ionizing radiation and → stellar wind of the associated massive stars. A remarkable example of these structures is displayed by the → HST image of the → Eagle Nebula as → pillars of obscuring matter protruding from the interior wall of a dark molecular cloud. Some → Bok globules may represent the remaining densest fragments of elephant trunks.

M.E. elephant, from O.Fr. olifant, from L. elephantus, from Gk. elephas "elephant, ivory," probably from a non-I.E. language, likely via Phoenician; trunk, from M.E. trunke, O.Fr. tronc, from L. truncus "stem, trunk, stump."

Xortum "the proboscis of an elephant," loanword from Ar. xartum; fil, pil "elephant," from Mid.Pers. pil "elephant;" O.Pers. piru- "ivory."

Elephant's Trunk Nebula
  میغ ِ خرطوم ِ فیل   
miq-e xortum-e fil

Fr.: Nébuleuse de la trompe d'éléphant   

An elongated dark structure of gas and dust in the → H II region IC 1396. It spans about 5 degrees on the sky in the constellation → Cepheus, about 2400 → light-years from the Earth. The Elephant Trunk Nebula is believed to be site of star formation, containing several very young stars. It is an example of → elephant trunks associated with star forming regions.

elephant trunk; → nebula.

elevate
  بالاییدن   
bâlâyidan

Fr.: élever   

1) To move or raise to a higher place or position; lift up.
2) To raise to a higher state, rank, or office; exalt; promote (Dictionary.com).

From L. elevatus, p.p. of elevare "to lift up, raise," from → ex- "out" + levare "lighten, raise," from levis "light" in weight, → lever.

Bâlâyidan, from bâla "up, above, high, elevated, height," related to boland "high," borz, "height, → magnitude."

elevating floor
  کف ِ بالارو   
kaf-e bâlârow (#)

Fr.: plancher mobile   

The floor below a telescope used to lift observers to the level of the telescope's eyepiece, since the telescope is tilted at varying angles when it is in use.

Elevating, adj. of → elevate; → floor.

elevation
  بالایش   
bâlâyeš

Fr.: élevation   

1) The height to which something is elevated or to which it rises.
2) An elevated place, thing, or part; an eminence (Dictionary.com).

Verbal noun of → elevate; → -tion.

eliminate
  اساندن   
osândan

Fr.: éliminer   

1) To remove or get rid of, especially as being in some way undesirable.
2) Math.: To remove (an unknown variable) from two or more simultaneous equations (Dictionary.com).

L. eliminatus, p.p. of eliminare "to thrust out of doors, expel," from ex limine "off the threshold," from → ex- "off, out" + limine, ablative of limen "threshold."

Osândan, from Tabari uzitan, huzənniyən, hozənniyan "to expel," from os- "out," → ex-, + -ândan suffix of transitive verbs.

elimination
  اسانش   
osâneš

Fr.: élimination   

1) The act of eliminating; the state of being eliminated.
Math.: The process of solving a system of simultaneous → equations by using various techniques to remove the → variables successively (Dictionary.com).

Verbal noun of → eliminate; → -tion.

ellipse
  بیضی   
beyzi (#)

Fr.: ellipse   

The locus of a point the sum of whose distances from two fixed points is constant.

From O.Fr. ellipse, from L. ellipsis "ellipse," also, "a falling short, deficit," from Gk. elleipsis "an omission," from el-, variant of en-, + leip-, stem of leipein "to leave" + suffix -sis.

Beyzi, from Ar.

ellipsoid
  بیضی‌وار   
beyzivâr (#)

Fr.: ellipsoïde   

A three-dimensional geometric figure resembling a flattened sphere. It is generated by rotating an ellipse around one of its axes.

From → ellipse + → -oid.

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