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: 13116 Search : far
conspicuous
  هویدا   
hoveydâ (#)

Fr.: remarquable, manifeste   

Easily seen or noticed; readily → visible or → observable (Dictionary.com).

From L. conspicuus "visible, open to view," from conspicere "to look at, observe, see, notice," from → com-, intensive prefix, + specere "to watch, look at," → spectrum.

Hoveydâ "conspicuous, manifest, evident," variant vidâ, probably related to Av. hu-vaēiδiia- "good knowledge, well-known," from hu- "good, well," → eu-, + vaēiδiia- "knowlege, known."

constant
  پایا   
pâyâ (#)

Fr.: constante   

A quantity that does not change during a particular process.

L. constantem "standing firm, stable," pr.p. of constare, from → com- "together" + stare "to stand;" PIE base *sta- "to stand;" cf. O.Pers./Av. sta- "to stand, stand still; set," Pers. istâdan "to stand," Skt. sthâ- "to stand," Gk. histemi "put, place, weigh," stasis "a standing still,"

pâyâ verbal adj./noun from pâyidan "to stand firm, to be constant, steady, fixed," Mid.Pers. pâyitan, pâtan, pây- "to protect; wait, stand," Sogdian p'y "to protect, watch over," O.Pers./Av. pâ(y)- "to protect, keep" pâtar- "protector, watcher," cf. Skt. pâ- "to protect, keep," pâti "protects," Gk. poimen "shepherd," poma "lid, cover," L. pastor "shepherd," panis "bread;" PIE base *pa- "to protect, guard, pasture, feed."

constant of aberration
  پایا‌ی ِ بیراهش   
pâyâ-ye birâheš

Fr.: constante d'aberration   

The maximum amount of the apparent yearly displacement of a star, resulting from the → aberration of starlight. The value of the constant of aberration, κ, at J2000.0 is 20".49552. κ = (v/c) csc 1", where v is the average speed of the Earth about the Sun and c is the → speed of light in vacuum. The Earth's speed is given by: v = 2πa / [P(1 - e2)1/2], where a is the → semi-major axis of the Earth's orbit, e is the → eccentricity of the Earth's orbit, and P is the → sidereal period of the Earth. Same as → constant of annual aberration. See also → constant of diurnal aberration.

constant; → aberration.

constant of annual aberration
  پایا‌ی ِ بیراهش سالانه   
pâyâ-ye birâheš sâlâné

Fr.: constante d'aberration annuelle   

Same as → constant of aberration.

constant; → annual; → aberration.

constant of diurnal aberration
  پایا‌ی ِ بیراهش روزانه   
pâyâ-ye birâheš ruzâné

Fr.: constante d'aberration diurne   

The quantity 0''.3200 ρ cos φ', where ρ is the geocentric distance of the observer measured in units of → equatorial radius the Earth and φ' is the observer's → geocentric latitude. The numerical part is equal to 2πa csc1'' / (cP), where a is the equatorial radius of the Earth, P is its → sidereal period of rotation, and c is the → speed of light in vacuum.

constant; → diurnal; → aberration.

constant of gravitation
  پایا‌ی ِ گرانشی   
pâyâ-ye gerâneši (#)

Fr.: constante de la gravitation   

gravitational constant.

constant of the motion
  پایای ِ جنبش   
pâyâ-ye jonbeš

Fr.: constante de mouvement   

1) Classical mechanics: A variable X whose total rate of change dX/dt along the path of a → dynamical system is zero. In other words, a function of an object's position, velocity, or both that does not change even as the object moves. For example, the total energy of a → simple harmonic oscillator is a constant of the motion.
2) Quantum mechanics: An → observable that remains constant in time. As an example, the energy is a constant of the motion of all systems whose → Hamiltonian does not depend explicitly upon time.

constant; → motion.

constellation
  هم‌اختران   
hamaxtarân

Fr.: constellation   

A grouping of conspicuous stars that, when seen from Earth, form an apparent pattern. The sky is divided into 88 constellations. → asterism.

From O.Fr. constellation, from L.L. constellationem (nom. constellatus) "set with stars," from L. → com- "with" + p.p. of stellare "to shine," from stella, → star.

Hamaxtarân, from ham- "with, together" + axtarstar + -ân suffix denoting group.

constituent
  آساتنده   
âsâtande

Fr.: constituant   

1) Forming part of a whole; component.
2) Politics, law: Having the power to frame a constitution or to constitute a government; a person who appoints another to act for him, as by power of attorney.
3) Linguistics: A word, phrase, or clause forming a part of a larger construction (TheFreeDictionary.com).

constitute; → -ent.

constitute
  آساتیدن   
âsâtidan

Fr.: constituer   

1) To make up; form; compose.
2) To appoint to an office or function.
3) To set up (a school or other institution) formally; found.
4) Law: To give legal form to (a court, assembly, etc.) (TheFreeDictionary.com).

From L. constitutus, p.p. of constituere "to cause to stand, set up, fix, place, establish, set in order; form something new," from → com- an intensive prefix + statuere "to set," from PIE root *sta- "to stand, make or be firm." cf. Pers. istâdan "to stand," → opposition.

Âsâtidan, from intensive prefix â- + sât variant of sâz-/sâxtan "to build, make, prepare," cf. Gazi sât- "to be reconciled with," Abyaneyi, Abuzeydâbâdi, Nâyini, Târi. sâta-/sâj-, Anâraki, Varzeneyi sâte-/sâj-, Ardestâni sûtte/sûj-, Hamadâni satän/saj-, Esfahâni satän/saz-, Jowšaqâni bam-sa:t- "to do, build," Xonsâri sât-/sâz-, Mahalâti sât/sâj- "to prepare, do;" Mid.Pers. sac, saz- "to be fitting, becoming, necessary," sac-, sâz- "to make, prepare;" Mod.Pers. sâz-, sâxtan "to build, construct, prepare;" cf. Skt. śak- "to be able, capable;" Proto-Ir. sac- "to fit, be suitable, be able, be in command of; to prepare" (Cheung, 2006).

constitution
  آساتش   
âsâteš

Fr.: constitution   

1) The act or process of composing, setting up, or establishing.
2) The system of fundamental laws and principles that prescribes the nature, functions, and limits of a government or another institution (TheFreeDictionary.com).

Verbal noun of → constitution.

constitutional
  آساتشی   
âsâteši

Fr.: constitutionnel   

1) Of or relating to a constitution.
2) Consistent with, sanctioned by, or permissible according to a constitution (TheFreeDictionary.com).

constitution; → -al.

constitutive
  آساتگر   
âsâtgar

Fr.: constitutif   

1) Making a thing what it is; essential.
2) Having power to institute, establish, or enact.

constitite; → -ive.

constrain
  پاوندیدن، پاوند کردن   
pâvandidan, pâvand kardan

Fr.: contraindre   

To confine forcibly, as by bonds; to force, compel, or oblige; to repress or restrain. → constrained body, → constrained system.

constraint.

constrained body
  جسم ِ پاوندیده   
jesm-e pâvandidé

Fr.: corps lié   

A → rigid body whose displacement is prevented because it is under → constraint or a body that can move only in certain directions. Contrasted with → free body.

Constrained, p.p. of → constrain; → body.

constrained system
  راژمان ِ پاوندیده   
râžmân-e pâvandidé

Fr.: système contraint   

Opposite of a → free system. See also → constraint.

Constrained, p.p. of → constrain; → system.

constraint
  پاوند   
pâvand (#)

Fr.: contrainte   

1) General: Limitation or restriction.
2) Mechanics: Any restriction imposed on the position or motion of a material system. Constraints are said to be internal if they do not impede free displacement of the system. All other kinds of constraints are called external. Systems subject only to internal constraints are free material systems.
3) Physics: A fact or condition, usually observational, that allows to reduce the number of free parameters in a theoretical model.

M.E. constreinte, from M.F., from constreindre, from L. constringere "to bind together, tie tightly," from → com- "together" + stringere "to bind, draw tight."

Pâvand "fetter, shackle," from "foot" (Mid.Pers. pâd, pây; Khotanese fad; Av. pad-; cf. Skt. pat-, Gk. pos, genitive podos; L. pes, genitive pedis; P.Gmc. *fot, E. foot, Ger. Fuss, Fr. pied; PIE *pod-/*ped-) + vand, variant band "tie, band," (Mod.-Mid./Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind).

constringence
     

Fr.: constringence   

Same as → Abbe number.

Noun from → constrain.

constructive interference
  اندرزنش ِ سازنده   
andarzaneš-e sâznadé

Fr.: interférence constructive   

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

Constructive, from M.Fr. constructif or from M.L. constructivus, from L. construct-, p.p. stem of construere "to heap up," from → con- + struc- variant stem of struere "to build," → structure; → interference.

Andarzaneš, → interference; sâzandé "constructive," from sâxtan, → structure.

consult
  هگاردن، رای زدن   
hagârdan, rây zadan (#)

Fr.: consulter   

To seek advice or information from; ask guidance from.

From M.Fr. consulter, from L. consultere "to deliberate, consult," frequentative of consulere "to consult, deliberate, consider, ask advice," from → com- "together" + -sulere, from PIE *selh- "to take, grab," cognate with E. sell, sold.

Hagârdan, from ha-, variant of ham- "together," → com-, + gâr "to observe, consider," variants gar-, gâl- (as in engâridan "to suppose," negaristan "to observe, look, notice," segâlidan "to think, discuss, consider") ultimately from Proto-Ir. *kar- "to observe, consider," cf. Av. kar- "to remember, to impress on memory," Skt. kal- "to observe, conside," kalayati "considers, observes;" see also âgâridan, → consider.

<< < -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 > >>