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: 1244
continuation
  پیداشت؛ پیداد   
peydâšt; peydâd

Fr.: continuation   

The act or state of continuing; the state of being continued.

Verbal noun of → continue + → -tion.

continue
  ۱) پیداشتن؛ ۲) پیدادن   
1) peydâštan; 2) peydâdan

Fr.: continuer   

1) (v.intr) To go on or keep on without interruption as in some course or action.
2) (v.trans) To cause to remain in a particular condition.

M.E. contynuen, from O.Fr. continuer, from L. continuare "to make all one, join together, make or be continuous," from continuus "uninterrupted," from continere "to be uninterrupted," literally "to hold together," from → con- + tenere "to hold," cognate with Pers. tanidan, → tension.

1) Peydâštan, from pey "after; pursuit; track; step," → tracking, + dâštan "to have, hold, maintain," → access.
2) Peydâdan, from pey, as above, + dâdan "to give, yield, grant, command," → yield.

continued
  پیداشته   
peydâšté

Fr.: continue   

Continuing to happen or exist for a long time. Occurring many times.

Past participle of → continue.

continued fraction
  برخه‌ی ِ پیداشته   
barxe-ye peydâšté

Fr.: fraction continue   

In mathematics, a fraction whose numerator is an integer and whose denominator is an integer plus a fraction whose numerator is an integer and whose denominator is an integer plus a fraction and so on.

continued; → fraction.

continuous
  پیوسته   
peyvasté (#)

Fr.: continu   

1) General: Uninterrupted in extent, sequence, or time.
2) Math.: A line or curve that extends without a break. → continuous function.

From L. continuus "uninterrupted," from contin(ere) "to hold together, retain," → continue, + -uus verbal adj. suffix.

Peyvasté "continous," peyvastan "to connect, join," Mid.Pers. paywastan, from *pati-basta-, from suffix pati- (Mid.Pers. pât-,from O.Pers. paity "agaist, back, opposite to, toward, face to face, in front of," Av. paiti, akin to Skt. práti "toward, against, again, back, in return, opposite," Pali pati-, Gk. proti, pros "face to face with, toward, in addition to, near;" PIE *proti) + basta- "tied, 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), cf. Skt. prati-bandh- "to tie."

continuous data
  داده‌های ِ پیوسته   
dâdehâ-ye peyvasté

Fr.: données continues   

Data that can take any value along a continuum (e.g. air temperature between two upper and lower boundaries) as opposed to → discrete data, which can only take integer values.

continuous; → data.

continuous function
  کریای ِ پیوسته   
karyâ-ye peyvasté

Fr.: fonction continue   

The function y = f(x) is called continuous at the point x = x0 if it is defined in some neighborhood of the point x0 and if lim Δy = 0 when Δx → 0.

continuous; → function.

continuous spectrum
  بیناب ِ پیوسته   
binâb-e peyvasté

Fr.: spectre continu   

An electromagnetic spectrum in which emitted or absorbed radiation is present continuously over all wavelengths in a given range.

continuous; → spectrum.

Binâb, → spectrum; peyvastécontinuous.

continuous variable
  ورتنده‌ی ِ پیوسته   
vartande-ye peyvasté

Fr.: variable continu   

A variable which has changes continuously, in contrast to → discrete variables.

continuous; → variable.

continuous-time quantum walk
  پویش ِ کو‌آنتومی با زمان ِ پیوسته   
puyeš-e kuântomi bâ zamân-e peyvasté

Fr.: marche quantique à temps continu   

A → quantum walk taking place entirely in the position space. Continuous-time quantum walk was introduced by E. Farhi & S. Gutmann (1998, Phys. Rev. A 58, 915).

continuous; → time; → quantum; → walk.

continuum
  پیوستار   
peyvastâr (#)

Fr.: continuum   

A continuous extent or succession, which has no discrete parts, as the continuum of real numbers as opposed to the sequence of discrete integers. → continuum emission.

From L. neut. of continuus, → continuous

Peyvastâr, from peyvast past tense stem of peyvastan "to connect, join," Mid.Pers. paywastan, from *pati-basta-, from suffix pati- (Mid.Pers. pât-, from O.Pers. paity "agaist, back, opposite to, toward, face to face, in front of," Av. paiti, akin to Skt. práti "toward, against, again, back, in return, opposite," Pali pati-, Gk. proti, pros "face to face with, toward, in addition to, near;" PIE *proti) + basta- "tied, 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), cf. Skt. prati-bandh- "to tie." + -âr suffix forming verbal noun.

continuum emission
  گسیل ِ پیوستار   
gosil-e peyvastâr

Fr.: émission continuum   

A continuous radiation produced by three processes: radiative recombination due to transition between electron free-free states, two-photon decays of metastable levels, and thermal bremsstrahlung.

continuum; → emission.

continuum-driven wind
  باد ِ پیوستار‌زاد   
bâd-e peyvastârzâd

Fr.: vent induit par continuum   

The transfer of photon momentum to free electrons. The acceleration by → continuum emission can be given by: ac = (σ/m)(L*/4πR2c), where σ is the → Thomson scattering  → cross section, m is the mass per free electron, L* is → stellar luminosity, R* is radius, and c the → speed of light. The ratio of ac to the → surface gravity is ≅ 2 × 10-5L*/M*, with M* and L* in solar units. The atmosphere is is stable if ac very smaller than ggrav. If L* is above the → Eddington limit, the radiation pressure in the continuum leads to very heavy → mass loss and thus to expanding envelopes (K.S. de Boer & W. Seggewiss, 2008, Stars and Stellar Evolution, EDP Sciences).

continuum; → drive; → wind.

contour
  پربند   
parband (#)

Fr.: contour   

The outline of a figure or body; the edge or line that defines or bounds a shape or object.

From Fr. contour "circumference, outline," from Italian contorno, from M.L. contornare "to go around," from L. → com- intens. prefix + tornare "to turn on a lathe," from tornus "lathe."

Parband, from par- "around" (Mid.Pers. pêrâ, O.Pers. pariy "around, about," Av. pairi "around, over," Skt. pari, cf. Gk. peri "around, about, beyond," L. per "through," PIE *per- "through, across, beyond") + band "belt, gridle, anything by which bodies are joined; tie, band," from bastan "to bind, shut," (Mid.Pers. bastan/vastan,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).

contour line
  خط ِ پربند   
xatt-e parband

Fr.: contour   

A line joining points of equal elevation or on a surface or points of equal intensity in a map.

contour; → line.

contour map
  نقشه‌ی ِ پربندی   
naqše-ye parbandi

Fr.: carte de contours   

A map showing the flux intensity variations over an extended object made up of → contour lines.

contour; → map.

contra-
  پاد-   
pâd- (#)

Fr.: contre-   

A prefix meaning "against; contrary; opposing."

From L. contra "against," passed (via O.Fr.) into E. as → counter-.

contract
  ترنگیدن   
terengidan

Fr.: se contracter, contracter   

1) To become smaller, shorter, tighter, as a metal when cooled.
2) To reduce to smaller size by or as if by squeezing or forcing together, e.g. contract a muscle.
contraction, → gravitational contraction, → Kelvin-Helmholtz contraction, → length contraction, → Lorentz contraction, → vena contracta.

From M.E., from O.F., from L. contractus, p.p. of contrahere "to draw together," from → com- "together" + trahere "to draw."

Terengidan, variant taranjidan [Dehxodâ] "to contract, become rough and hard, to be squeezed, compressed," Borujerdi terengessa "cramped, tightly dressed," Malâyeri terengidan "to be tightly dressed, cramped in a garment," related to tarang "horse girth, a strap for fastening a load," Proto-Iranian *trng- "to pull tight, squeeze, compress;" PIE base *strenk- "to pull tight, twist; tight, narrow" (cf. L. stringere "to bind or draw tight;" Gk. strangein "to twist;" Lith. stregti "to congeal;" O.E. streccian "to stretch," streng "string;" Ger. stramm, Du. stram "stiff").

contraction
  ترنگش   
terengeš

Fr.: contraction   

An act or instance of contracting; the quality or state of being contracted.
gravitational contraction, → Kelvin-Helmholtz contraction, → length contraction, → Lorentz contraction.

Verbal noun of → contract.

contradiction
  پادگویی   
pâdguyi (#)

Fr.: contradiction   

1) The act of contradicting; assertion of the contrary or opposite.
2) Logic: A statement that is false under all circumstances.

M.E., from O.Fr. contradiction or directly from L. contradictionem "objection, counterargument," from contradicere, from contra dicere "to speak against," from → contra- "against" + dicere "to speak," akin to Pers. dis, → form.

Pâdguyi, literally "speaking against," from pâd, → counter-, + guyi, from goftan, → logic.

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