An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 692

Fr.: décryptage   

Make crypted data or information intelligible. See also → encrypt and → decode.

de- + crypt, → encrypt.

vânehâneš (#)

Fr.: décryptage   

The process of restoring encrypted data back to the original information. See also → encryption and → decoding.

decrypt; → -tion.

  فروهاختن، فروهازیدن   
foruhâxtan, foruhâzidan

Fr.: déduire   

To derive as a conclusion from facts or premises.

L. deducere "to lead down, derive," from → de- "down" + ducere "to lead."

Foruhâxtan, foruhâzidan, from foru- "down," → de- + Mid.Pers. hâxtan, hâzidan "to lead, guide, persuade," Av. hak-, hacaiti "to attach oneself to, to join," cf. Skt. sacate "accompanies, follows," Gk. hepesthai "to follow," L. sequi "to follow;" PIE *sekw- "to follow."


Fr.: déduction   

1) The act or process of deducting; something that is or may be deduced.
2) A process of reasoning in which a conclusion is derived from the premises presented without a need for additional information. → deductive reasoning.

Verbal noun from → deduce.


Fr.: déductif   

Of or relating to → deduction.

From deduct, → deduce, + → -ive.

deductive reasoning
  راینش ِ فروهازشی   
râyaneš-e foryhâzeši

Fr.: raisonnement déductif   

Reasoning from the → general to the → particular (or from → cause to → effect).

deductive; → reasoning.

  ۱) ژرف، گود؛ ۲) ژرفنا   
1) žarf (#), gowd (#); 2) žarfnâ (#)

Fr.: 1) profond; 2) profondeur   

1a) General: Extending well inward from an outer surface or back from an edge.
1b) Great in measure; intense. → deep exposure.
1c) Of colors, dark and vivid.
2) The deep part of a body of water, especially an area of the ocean floor having a depth greater than 5400 meters (

O.E. deop, from P.Gmc. *deupaz, from PIE *d(e)u- "deep, hollow."

Žarf "deep;" variants Gilaki jalf, julf, jal; Tabari jol, jal, jul; Baluci jahl, johl; Kermâni jarr "deep;" Mid.Pers. zufr; Av. jafra- "deep."
Gowd, probably ultimately from PIE root *gwādh- "to sink, submerge;" cf. Av. vigāθô- "ravines, gorges;" Skt. gādha- "depth; shallow;" Gk. bessa "gorge, ravine."

deep exposure
  نورداد ِ ژرف   

Fr.: pose profonde   

An exposure in which the detector shutter remains open for a relatively long time in order to bring out the weaker features of the observed object. In practice a deep exposure with a CCD detector is usually obtained from co-addition of shorter exposures.

deep; → exposure.

deep field
  میدان ِ ژرف   
meydân-e žarf

Fr.: champ profond   

An area on the sky whose image is obtained with a deep exposure, such as → Hubble Deep Field.

deep; → field.

deep image
  تصویر ِ ژرف   
tasvir-e žarf

Fr.: image profonde   

An image obtained using a deep exposure to reveal the weak features of the object.

deep; → image.


Fr.: défaut   

1) Failure to act; inaction or neglect; failure to meet financial obligations.
2) Lack; want; absence. See also → deficiency, → lack, → shortage.
3) Computers: A selection automatically used by a program when none is specified by the user. → by default.

M.E. defau(l)te, O.Fr. defaute "fault, defect, failure," from V.L. *defallita "a deficiency or failure," p.p. of *defallere, from L. → de- "away" + fallere "to deceive, to cheat; to put wrong, to lead astray."

Nâbun, literally "not-being, non-existence," from nâ- negation prefix, → non-, + (Kurd.) bun "to be," variants (Gazi, Yarani, Gurani, Semnâni) bu-, classical Pers. bov-, budan "to be, → exist."

  آک؛ کاست   
âk; kâst (#)

Fr.: défaut   

General: Something or a lack of something that results in incompleteness, inadequacy, or imperfection.
Crystals: A discontinuity in the arrangement of atoms, ions, or electrons.
Cosmology: → cosmic defect.

From L. defectus "failure," from p.p. of deficere "to fail, desert," from → de- "down, away" + facere "to do," (cf. Fr. faire, Sp. hacer), from PIE base *dhe- "to put, to do" (cf. Av. dadaiti "he puts," Skt. dadhati "puts, places," Hitt. dai- "to place," Gk. tithenai "to put."

Âk "defect, blemish;" Mid.Pers. ak, âk "evil, harm;" Av. aka- "bad, wicked;" cf. Skt. aka- "pain , trouble."
Kâst "loss," from kâstan, kâhidan "to decrease, lessen, diminish," from Mid.Pers. kâhitan, kâstan, kâhênitan "to decrease, diminish, lessen;" keh "small, little, slender;" Av. kasu- "small, little;" Proto-Iranian *kas- "to be small, diminish, lessen."

  فلک ِ حامل   
falak-e hâmel (#)

Fr.: déférent   

In Ptolemy's geocentric model, the circle around the Earth in which the center of the → epicycle of a body was thought to move.

Deferent, from L. deferent-, pr.p. of deferre "to carry from or down, transfer" from → de- + ferre "to carry, bear," from PIE *bher- "to bear, to carry, to take" (cf. O.Pers./Av. bar- "to bear, carry," barəθre "to bear" (infinitive), Mod.Pers. bordan, bar- "to carry," Skt. bharati "he carries," Gk. pherein "to carry").

Falak-e hâmel, from Ar. falak "heaven; orbit, sphere" + hamil "carrier."

deferred charge
  بار ِ بازداشته   
bâr-e bâzdâšté

Fr.: rétention de charge   

In a CCD detector, phenomenon caused by charge traps or potential pockets, which prevent electrons from being released to the adjacent pixel; eventually the electrons may be released in a subsequent cycle.

Differed, p.p. of differ, from O.Fr. différer, from L. differre "set apart, put off, delay," also "be different, differ," → differ; → charge.

Bârcharge; bâzdâšté "prevented," p.p. of bâzdâštan, from preventive suffix bâz- + dâštan "to hold, have, maintain," Mid.Pers. dâštan, O.Pers./Av. root dar- "to hold, keep back, maitain, keep in mind," Skt. dhar- "to hold, keep, preserve," dharma- "law," Gk. thronos "elevated seat, throne," L. firmus "firm, stable," Lith. daryti "to make," PIE *dher- "to hold, support."

  مخش، کمی   
maxeš, kami (#)

Fr.: déficience   

Noun from → deficient.

  مخنده، کم   
maxandé, kam

Fr.: déficient   

1) Lacking some element or characteristic; defective.
2) Insufficient; inadequate.

From L. deficientem, pr.p. of deficere "to desert, fail," from → de- "down, away" + facere "to do, perform" + -ency a noun suffix, equivalent to → -ence.

Maxeš, from (Dehxodâ) max "missing; vanished; annihilated," variant (Nâyini) mak "missing;" maybe ultimately from Proto-Ir. *maiH- "to fade, damage, to harm;" cf. Av. (+ *ui-) vīmiti- "loss, destruction;" O.Pers. mīθah- "damage, harm;" Mid.Pers. myh-g'r "damage, harm;" Sogdian ''m'yk "dirt, mixture," 'myq "taint, infection;" Ossetic mynæg, minæg "weak, dim, fading;" Skt. mayi "to damage, to lessen;" Gk. minytho "to diminish, to lessen;" L. minuoere "to diminish, to lessen," minor "smaller, less;" PIE root *meiH- "to lessen, diminish" (Cheung 2007).


Fr.: définir   

1) To state or set forth the meaning of (a word, concept, etc.).
2) To explain or identify the nature or essential qualities of.
3) To fix or mark the boundaries or extent of.

From O.Fr. définir "to end, determine," from L. definire "to limit, determine, explain," from → de- + finire "to bound, limit," from finis "boundary."

Hedâridan, infinitive from Semnâni hedâr "boundary (between pieces of lands)," Tabari hedâri "boundary, border," may be related to Av. haêtav- "dam, dike," Skt. setu- "a ridge of earth, bank, dike, dam, bridge."


Fr.: défini   

1) Clearly characterized or fixed.
2) Showing clearly the outline or profile or boundary.
3) Computer science: A variable having received a value prior to a given point in a program.

P.p. of → define.


Fr.: défini   

Clearly defined or determined; having fixed limits. → definite integral.

From L. definitus "limited, precise," p.p. of definiredefine.

Hedârmand from hedâr, stem of hedârdandefine, + -mand possession suffix.

definite integral
  درستال ِ هدارمند   
dorostâl-e hedârmand

Fr.: intégrale définie   

An integral with upper and lower limits.

definite; → integral.

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