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: 699
deprive
  آزوَ‌ندن   
âzvandan

Fr.: priver   

To remove or withhold something from the enjoyment or possession of (Dictionary.com).

M.E. depriven, from O.Fr. depriver, from L. deprivare, from → de- + privare "to separate, rob," → private

Âzvandan, from âz- "out, away," → ex-, + van, contraction of vand, band "to bind, fasten, close," → private.

depth
  ژرفا   
žarfâ (#)

Fr.: profondeur   

Noun form of → deep. → optical depth.

From M.E. depthe, from O.E. deop "deep," → deep + -the "-th."

Žarfâ, noun of žarf "deep," → deep + .

derivation
  واخنش   
vâxaneš

Fr.: dérivation   

1) General: The act or fact of deriving or being derived; origin; descent.
2) Math.:differentiation; development of a theorem.
3) Grammar: The formation of a word from another word or base. It typically occurs by the addition of an affix.

Verbal noun of → derive.

derivative
  واخنه   
vâxané

Fr.: 1) dérivé; 2; 3) dérivée   

1) General: Derived from another; not original or primitive.
2) Math.: For a → function  y = f(x), the → limit of the → ratio of the → increment of the function, Δy, to the increment of the → variable, Δx, as the latter tends to → zero. Derived function; result of → differentiation.
3) Chemistry: Substance derived or prepared from some other → substance.

From M.E. derivatif, from L.L. derivativus, from derivat(us), p.p. of derivare, → derive + -ivus.

Vâxané, noun from vâxan, present stem of vâxanidan, → derive.

derive
  واخنیدن   
vâxanidan

Fr.: dériver de, tirer de   

1) General: To conduct, draw, obtain from a source or origin; to trace to an origin.
2) Chemistry: To produce or obtain (a → substance) from another.
3) Math.: Verbal form of → derivation.

From O.Fr. dériver, from L. derivare "to draw off (a stream of water), from its source," from de- "from" + riv(us) "a stream" + -are infinitive suffix.

Vâxanidan, from vâ- prefix which indicates "returning to, reference," → de-, + xan "source," variant xân (Gilaki xoni, Tabari xoni, Laki kyani, Tâleši xâni, xoni, Mid.Pers. xân, xânig "source, spring," Av. xā-, xan- "source, fountain, spring," xayana- "belonging to a spring," cf. Khotanese khâhâ- "spring, fountain," Skt. khâ'- "spring, source") + -idan infinitive suffix.

derived
  واخنیده   
vâxanidé

Fr.: dérivé   

Determined by mathematical computation; formed or developed from something else; not original.

P.p. of → derive.

Descartes
  دکارت   
Descartes

Fr.: Descartes   

René Descartes (1596-1650), French mathematician, physicist, and philosopher, who made valuable contributions to mathematics, physics, and philosophy. Descartes was a pioneer and major figure in 17th century rationalism. He represents a major break with the Aristotelianism and Scholasticism of the Medieval period. René Descartes is regarded as the father of modern philosophy. → Descartes ray, → Cartesian coordinates, → Cartesian vortex theory.

Descartes ray
  پرتو ِ دکارت   
partow-e Descartes

Fr.: rayon de Descartes   

Same as → rainbow ray.

Descartes; → ray.

descending node
  گره ِ فرودشی   
gereh-e forudeši

Fr.: nœud descendant   

The point in an orbit where the orbiting body crosses a reference plane, such as the ecliptic or the celestial equator, going from north to south. → ascending node.

Descending, from descend, from L. descendere "to go down," from → de- "down" + scandere "to climb;" Node, from L. nodus "knot."

Gereh "knot," from Mid.Pers. grih "knot." Forudeši adj. of forudeš, verbal noun of forudidan "to descend, go down," (Mid.Pers. frôtihitan "to descend"), from forud "down, downward," Mid.Pers. frôt "down, downward," O.Pers. fravata "forward, downward," Skt. pravát- "a sloping path, the slope of a mountain."

describe
  واوشتن، واویسیدن   
vâveštan, vâvisidan

Fr.: décrire   

1) General: To tell or represent in written or spoken words; give an account of.
2) Geometry: To draw or trace the outline of.

M.E. describen, from L. describere, from → de- + scribere "to write," from PIE *skreibh- (cf. Gk. skariphasthai "to scratch an outline, sketch;" Lett. skripat "scratch, write;" O.N. hrifa "scratch"); PIE base *sker- "cut, incise."

Vâveštan, vâvisidan (on the model of neveštan, nevisidan "to write"), from vâ-, → de-, + vešt-, vis- (see below) + -idan infinitive suffix. Vešt-, vis-, from Mid.Pers. bišt-, bis- (nibištan, nibes- "to write"), from O.Pers. pais- "to adorn, cut, engrave;" Av. paēs- "to paint, adorn," paēsa- "adornment;" Mid.Pers. pēsīdan "to adorn;" cf. Skt. piśáti "adorns; cuts;" Gk. poikilos "multicolored;" L. pingit "embroiders, paints;" O.C.S. pisati "to write;" O.H.G. fēh "multicolored;" Lith. piēšti "to draw, adorn;" PIE base *peik- "colored, speckled."

description
  واوشت، واویس   
vâvešt, vâvis

Fr.: description   

1) The act or method of describing.
2) Geometry: The act or process of describing a figure.

Verbal noun of → describe.

descriptive
  واوشتی، واویسنده   
vâvešti, vâvisandé

Fr.: descriptif   

Serving to describe; containing description.

describe; → -ive.

desert
  کویر   
kavir (#)

Fr.: désert   

1) An arid land where average annual precipitation is so low (usually taken as below 250 mm mean annual rainfall) that it will not adequately support vegetation, and where the potential rate of evaporation far exceeds precipitation.
2) Any place lacking in something; → brown dwarf desert.

From M.E., from O.Fr. desert, from L.L. desertum, literally "thing abandoned," from deserere "to abandon."

Kavir "salt and sour ground, where nothing grows; wilderness," of unknown origin.

design
  ۱) برسه؛ ۲) برسیدن   
1) barsé; 2) barsidan

Fr.: 1) dessin, plan, projet, conception; 2) dessiner, tracer le plan   

1a) An outline, sketch, or plan, as of the form and structure of a work of art, an edifice, or a machine to be executed or constructed.
1b) Organization or structure of formal elements in a work of art; composition.
2a) To prepare the preliminary sketch or the plans for (a work to be executed), especially to plan the form and structure of.
2b) To plan and fashion artistically or skillfully.
2c) To intend for a definite purpose (Dictionary.com).

M.E. designen, from M.Fr. desseign "purpose, project, design," from It. disegno, from disegnare "to mark out," from L. designare "mark out, devise, designate, appoint," from → de- "out" + signare "to mark," from signum "a mark, → sign."

Barsé, related to (Delijâni) barsi "to throw," variants baysi, vaesi, deresi; (Xonji, Gerâši) bar-, barressa "to fall down;" ultimately from Proto-Ir. *garH- "to throw;" cf. (+*ni-) Av. niγr- "to throw down;" Khotanese bīr- "to throw, sow;" Pers. garzin "a pointed arrow;" Pashto qoer "jump, leap," aqar "fitting an arrow to the bow-string ready to shoot;" cf. Skt. gar- "to raise a weapon;" Gk. ballein "to throw," → problem, blema "projectile;" PIE root *gwelH- "to throw" (Cheung 2007). Barsé is coined on the model of Ger. Entwurf "design; project" and entwerfen "to design," from werfen "to throw;" Pers. dar-andâxtan "to propound, to pose" (Hâfez: falak râ saxt beškâfim o tarhi now dar-andâzim); also Ar. tarh (طرح) "to throw."

designation
  نامگزینی   
nâmgozini (#)

Fr.: designation   

A distinctive name or title; appellation. → Bayer designation; → Flamsteed designation; → variable star designation.

From L. designatus, p.p. of designare "to mark out, choose, appoint," from → de- "out" + signare "to mark," from signum, → sign.

Nâmgozini, from nâm, → name, + gozini "choosing," from gozidan "to chose," → select.

designer
  برسه‌گر   
barsegar

Fr.: dessinateur, créateur, designer   

A person who devises or executes designs, especially one who creates forms, structures, and patterns, as for works of art or machines (Dictionary.com).

design; → -er.

desorb
  واشمیدن   
vâšamidan

Fr.: désorber   

Verbal form of → desorption.

Desorb, from → de- + -sorb, modeled on → absorb.

vâšamidan, from vâ-, → de-, + šamidan, modeled on baršamidan, → absorb.

desorption
  واشم   
vâšam

Fr.: désorption   

A physical or chemical process by which a substance that has been sorbed (adsorbed or absorbed) by a liquid or solid material is removed from the material. Reverse of → sorption. → absorption; → adsorption.

Verbal noun of → desorb.

despite
  پادکام   
pâdkâm

Fr.: malgré, en dépit de   

In spite of; notwithstanding.

M.E. despit, from O.Fr. despit, from L. despectus "a looking down on, scorn, contempt," from p.p. of despicere "to look down on, scorn," from → de- "down" + spicere/specere "to look at," → scope; the preposition is contraction of in despite of, a loan-translation of O.Fr. en despit de "in contempt of."

Pâdkâm, literally "against (one's) will or desire," from pâd- "against, contrary," → anti-, + kâm "desire, wish;" Mid.Pers. kâm "desire, wish;" cf. Skt. kāma- "desire, wish."

destructive interference
  اندرزنش ِ ویرانگر   
andarzaneš-e virângar

Fr.: interférence destructive   

An → interference process in which the → amplitude of the the amplitude of the resultant wave is less than that of either individual waves. See also → constructive interference.

Destructive, from O.Fr. destructif, from L.L. destructivus, from destruct-, p.p. stem of destruere, from → de- + struere "to build," → structure; → interference.

Andarzaneš, → interference; virângar "destructive," from virân, "destroyed, ruined."

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