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: 763
deny
  نیاردن   
niyârdan

Fr.: nier   

To state that (something declared or believed to be true) is not true (Dictionary.com).

M.E. denien, from O.Fr. denoiir "deny, repudiate, withhold," from L. denegare "to deny, reject, refuse," from → de- "away" + negare "refuse, say no," from Old L. nec "not," from PIE root *ne- "no, not."

Niyârdan, literally "to bring (say) no," from ni-, variant of nanot, → non-, → un-, + ârdan contraction of âvardan "to bring; to cause or produce," → production.

dependent
  وابسته   
vâbasté (#)

Fr.: dépendant   

1) General: Determined or conditioned by something else.
2) Math.: A variable whose value depends on the value assigned to another variable.
3) Statistics: An event which is not independent.

M.E. dependant, from M.Fr., pr.p. of dépendre, from L. dependere, from → de- + pendere "to hang, be suspended," PIE base *(s)pen(d)- "to pull, stretch."

Vâbasté, from vâ-de- + basté p.p. of bastan "to bind, shut," from Mid.Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," cf. Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind" (Ger. binden, E. bind).

dependent variable
  ورتنده‌ی ِ وابسته   
vartande-ye vâbasté

Fr.: variable dépendante   

Math.: A variable whose value depends on the value assigned to another value. For example, in the equation y = 2x, the value of y depends on that of x. See also → independent variable.

dependent; → variable.

dephase
  وافازیدن   
vâfâzidan

Fr.: déphaser   

To make two signals out of phase. For example, to get one signal at its highest peak while the other signal is at its lowest peak; they will be 180 degrees out of phase.

de-; → phase.

dephased
  وافازیده   
vâfâzidé

Fr.: déphasé   

Same as → out of phase.

Past participle of → dephase.

deplete
  تیساییدن   
tisâyidan

Fr.: amenuiser, réduire   

To decrease markedly the supply or abundance of; exhaust; to cause → depletion.

From L.L. depletionem "blood-letting," from L. deplere "to un-fill, to empty out," from → de- "off, away" + plere "to fill," from plenus "full," from PIE *ple- "to be full," PIE base *pelu- "full," cf. O.Pers. paru- "much, many," Av. parav-, pauru-, pouru-, par- "to fill," Mod.Pers. por "full," Skt. puru-, Gk. polus. por "full," Gk. polus, O.E. full "full," from P.Gmc. *fullaz, O.H.G. fol, Ger. voll, Goth. full.

Tisâyidan, from Tabari tisâ "empty, naked, bare" + -idan infinitive suffix. Variants of tisâ in dialects and literary Pers.: Saraxsi, Lâsgardi, Sangesari tusâ "empty, naked," Aftari tussâ "empty," literary Pers. tohi "empty," Mid.Pers. tuhig, Av. taoš- "to become empty," pres. tusa-, caus. taošaya-, tusən "they lose their posture," Skt. tuccha-, tucchya- "empty," L. tesqua, tesca "deserted place," Russian tošcij "hollow;" PIE base *teus- "to empty."

depletion
  تیسایش   
tisâyeš

Fr.: déplétion   

General: The act or process of depleting. The state of being depleted.
Astro.: The process or state of a material which contains less of a particular chemical element or isotope than the expected standard amount.

Noun from → deplete

depletion layer
  لایه‌ی ِ تیسایش   
lâye-ye tisâyeš

Fr.: couche de déplétion   

The region of a semiconductor in which the density of mobile carriers is too low to neutralize the fixed charge density of donors and acceptors.

depletion; → layer.

depletion time
  زمان ِ تیسایش   
zamân-e tisâyeš

Fr.: temps de déplétion   

The time it takes for a given → chemical species to be reduced below a significant level of → abundance in a → compound or → object.

depletion; → time.

depolarization
  واقطبش   
vâqotbeš (#)

Fr.: dépolarisation   

Reducing or randomizing the polarization of an electromagnetic wave, by transmission through a non-homogeneous medium or a depolarizer.

from → de- + → polarization.

depopulate
  واپرینیدن   
vâporinidan

Fr.: dépuepler   

To remove or reduce the population of, as by destruction or expulsion (Dictionary.com).

de-; → populate.

deport
  وابرتیدن   
vâbartidan

Fr.: déporter   

To expel forcibly a foreigner from a country; banish.

de-; → export.

deportation
  وابرتش   
vâbarteš

Fr.: déportation   

The action of deporting an alien from a country.

deport; → -tion.

deposit
  ۱) لرد؛ ۲) لرد انداختن، ~ افتادن، لردیدن   
1) lerd; 2) lerd andâxtan, lerd oftâdan, lerdidan

Fr.: 1) dépôt, gisement, lie, tarte; 2) déposer, se déposer   

1a) Something precipitated, delivered and left, thrown down, or accumulated, as by a natural process.
1b) Substance which settles down from a solution or a suspension, such as the natural sediment of wine in a bottle. See also → sediment.
2) To leave or form a layer of some substance (sand, sediment, etc.) as a gradual process in one place, or be left in this way.

From L. depositus, p.p. of deponere "to lay aside, put down," from → de- "away" + ponere "to put," → position.

Lerd "sediment, tartar of wine," probably a variant of dord "dregs, lees, sediment, tartar of wine."

deposition
  وانهش   
vâneheš

Fr.: dépôt   

The process by which water vapor changes directly to ice without first becoming a liquid. This is how snow forms in clouds, as well as frost and hoar frost on the ground. The opposite of deposition is → sublimation. → condensation.

M.E., from O.Fr. deposition, from L. deposition- "putting aside, testimony, burial," from deposit(us) "laid down," p.p. of deponere "to put down," from → de- + ponere "to put, place."

Vâneheš, from vâ-de- + neheš verbal noun of nehâdan "to put, place," Mid.Pers. nihâtan, O.Pers./Av. ni- "down; into," → ni-, + dā- "to put; to establish; to give," dadāiti "he gives," cf. Skt. dadâti "he gives," Gk. didomi "I give," L. do "I give;" PIE base *do- "to give."

depredation
  واچَوِش   
vâcaveš

Fr.: déprédation   

An act of attacking or plundering.

de-; → predation.

depression
  ۱) نشیب ِ افق؛ ۲) فروبار؛ ۳) نشیب‌لاخ   
1) našib-e ofoq; 2) forubâr; 3)

Fr.: dépression   

1) Navigation:dip.
2) Meteorology: An area of low atmospheric pressure.
3) Geology: An area of the Earth's crust sunken or depressed below the surrounding area, formed by various mechanisms.

Depression, verbal noun of depress, from O.Fr. depresser, from L.L. depressare, frequentative of pressus, p.p. of deprimere "press down," from → de- "down" + premere "to press."

1) Našib-e ofoq, from našib "declivity, descent; lowness of ground, slope of any place" (Mid.Pers. nišēp "declivity, (astrology) dejection," Av. *nixšvaēpā-, xšvaēpā- "bottom, rear") + ofoqhorizon. 2) Forubâr, from foru "down, downward; below; beneath," → de- + bâr "load, pressure, charge," → charge. 3) Našiblâx, from našib, as above, in item 1, + -lâx place suffix.

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.

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