An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13116 Search : far
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.

Descartes' formula
  دیسول ِ دکارت   
disul-e Descartes

Fr.: formule de Descartes   

A formula that gives the position of an image formed by highly → paraxial rays from a → spherical mirror. It is quite accurately given by: 1/xo + 1/xi = 2/xC, where xo is the distance along the → principal axis from the mirror to the object, xi is the distance from mirror to image, and xC is the distance from the mirror to its center of curvature. Any distance measured on the same side of the mirror as the reflecting surface is positive; on the other side, negative. Thus for a → concave mirror  xC is positive; for a → convex mirror, negative.

Descartes; → formula.

descend
  فرودیدن   
forudidan

Fr.: descendre   

1) To go or pass from a higher to a lower place.
2) To be passed on by parents or ancestors; be inherited

M.E. descenden, "move or pass from a higher to a lower place," from O.Fr. descendre "descend, dismount; fall into; originate in," from Latin descendere "come down, descend, sink," from → de- "down" + scandere "to climb," from PIE root *skand- "to spring, leap, climb."

descendant
  فرودان   
forudân

Fr.: descendant   

1) A person, animal, or plant that is descended from a specific individual, race, species, etc.
2) Something deriving in appearance, function, or general character from an earlier form.

descend.

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.

descend; → -ing; → node.

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-, → inscribe.

description
  واوشت   
vâvešt

Fr.: description   

1) The act or method of describing.
2) A statement, picture in words, or account that describes.
3) 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."

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc 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 Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg 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 > >>