An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < -ci cal Cam can car Car cat cat CCD Cen cen CH cha cha che cho cir cir cis cla clo clo CN coa coh col col col com com com com com com com com con con con con con con con con con con con coo Cor cor cor cos cos Cou cou cre cri cro cry Cup cus cyc > >>

Number of Results: 1234
consider
  آگاریدن   
âgâridan

Fr.: considérer   

To think carefully about, especially in order to make a decision; contemplate; reflect on (dictionary.com).

M.E. consideren, from O.Fr. considerer "reflect on, study," from L. considerare "to examine, look at closely," literally "to observe the stars," from → com- "with" + sider (stem of sidus) "star, group of stars," → sideral.

Âgâridan, from intensive prefix â- + gâr-, variants gar-, gâl- "to consider, observe," as in engâridan "to suppose," negaristan "to observe, look, notice," segâl "thought," segâlidan "to think, meditate," ultimately from Proto-Iranian *kar- "to observe, to consider;" cf. Av. kar- "to remember; to impress on memory;" Skt. kal- "to observe, consider," kalayati "considers, observes."

considerable
  آگاریدنی   
âgâridani

Fr.: considérable   

1) Rather large or great in size, distance, extent, etc.
2) Worthy of respect, attention, etc.; important; distinguished (dictionary.com).

consider; → -able.

consideration
  آگارش   
âgâreš

Fr.: considération   

The act or an instance of considering.

consider; → -tion.

consonant
  هم‌آوا   
hamâvâ (#)

Fr.: consonne   

In general, a speech sound in whose production the flow of air is obstructed at some point in the mouth, throat, or larynx, at least sufficiently to cause audible friction. A speech sound other than a → vowel.

M.E., from L. consonant-, consonans "sounding with," p.p. of consonare  "to sound together, agree," from → com- "together," +  sonare "to sound;" originally a sound that had to be accompanied by a vowel.

Hamâvâ, literally "sounding with," from ham-, → com-, + âvâ, → phone.

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.

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.

consume
  گساردن   
gosârdan (#)

Fr.: consommer   

1) To use up, spend. See also → expend.
2) To eat or drink.

M.E., from O.Fr. consumer "to consume" and directly from L. consumere "to use up, eat, waste," from → com-, intensive prefix, + sumere "to take," from → sub- "under" + emere "to buy, take," from PIE root *em- "to take, distribute;" cf. Skt. yam- "to hold," Av. yam- "to hold, keep," → expend.

Gosârdan "to consume, drink; dissipate, wipe out; let go," probably from Proto-Ir. *ui-sard-, from *sard- "to smear, rub;" cf. Khotanese (+*ā-) esaly "to besmear;" Kurd. sirīn "to wipe," sirewe "to wipe out, erase;" Oss. særdyn "to smear."

consumption
  گسارش   
gosâreš

Fr.: consommation   

1) The act of consuming.
2) The amount consumed.

Verbal noun of → consume.

<< < -ci cal Cam can car Car cat cat CCD Cen cen CH cha cha che cho cir cir cis cla clo clo CN coa coh col col col com com com com com com com com con con con con con con con con con con con coo Cor cor cor cos cos Cou cou cre cri cro cry Cup cus cyc > >>