An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



<< < -ci cal cal can car car Cas cat cau cel Cen CER Cha cha Che che chr cir cir civ cla clo clo CNO coa coe coi 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 CP cre cri cro cub cur cya cyl > >>

Number of Results: 1286
calculus of probabilities
  افماریک ِ شوانایی‌ها   
afmârik-e šavânâihâ

Fr.: calcul des probabilités   

A branch of mathematics that deals with the calculation of the probabilities of events.

calculus; → probability.

Afmârik, → calculus; šavânâihâ, plural of šavânâiprobability.

calculus of residues
  افماریک ِ مانده‌ها   
afmârik-e mândehâ

Fr.: calcul des résidus   

The application of → Cauchy's theorem to compute residues and poles, evaluate contour integrals, sum infinite series, and carry out related calculations.

calculus; residue from O.Fr. résidu, from L. residuum "a remainder," neut. of residuus "remaining, left over," from residere "remain behind."

Afmârik, → calculus; mândehâ, plural of mândé "remained," from mândan "to remain," Mid.Pers. mânidan, mânenitan, O.Pers./Av. man- "to remain, to stay," Skt. mand-, mamandhi "to stand still, pause," Gk. menein "to wait."

calculus of tensors
  افماریک ِ تانسورها   
afmârik-e tânsorhâ

Fr.: calcul tensoriel   

The branch of mathematics dealing with the differentiation of tensors.

calculus; → tensor.

Afmârik, → calculus; → tensor.

calculus of variations
  افماریک ِ ورتش‌ها   
afmârik-e vartešhâ

Fr.: calcul des variations   

The study of maximum and minimum properties of → definite integrals.

calculus; → variation.

Afmârik, → calculus; vartešvariation.

calculus of vectors
  افماریک ِ بردارها   
afmârik-e bordârhâ

Fr.: calcul vectoriel   

The area of calculus dealing with differentiation and integration of vector-valued functions; a sub-area of tensor calculus.

calculus; → vector.

Afmârik, → calculus; bordâr, → vector.


Fr.: caldeira   

A large, roughly circular, → crater with diameter at least three or four times depth on the summit or in the side of a → volcano. A caldera can form from a volcanic blast or the collapse of a volcanic cone into an emptied → magma chamber.

From Sp. caldera "cauldron, kettle," also name of a crater on Canary Islands, from L. caldarius "of warming," from calidus "warm, hot," → calorie.

Tiyân "large cauldron; cauldron used for warming water in a communal bathhouse," of unknown origin.

Caldwell Catalog
  کاتالوگ ِ کالدول   
kâtâlog-e Caldwell

Fr.: catalogue de Caldwell   

A collection of 109 impressive celestial objects compiled for amateur astronomers. These objects (→ star clusters, → nebulae, → supernova remnants, and → galaxies), selected from the → New General Catalog and the → Index Catalog, are not present in the → Messier catalog.

Named after Patrick Caldwell Moore (1923-2012), English amateur astronomer, who compiled the catalog in 1995; → catalog.

  ۱) گاهشمار، گاهشماری، گاهمار؛ ۲) سالنامه   
1) gâhšomâr (#), gâhšomâri (#), gâhmâr; 2) sâlnâmé (#)

Fr.: calendrier   

1) Any of various systems for measuring and recording the passage of time by dividing the year into days, weeks, and months.
2) A table showing the months, weeks, and days in at least one specific year.

M.E. calender, from O.Fr. calendier, from L. calendarium "account book," from kalendae "calends" the first day of the Roman month, from calare "to announce solemnly, call out," as the priests did in proclaiming the new moon that marked the calends, from PIE base *kele- "to call, shout" (cf. Skt. usakala "cock," lit. "dawn-calling;" Gk. kaleo "to call," kelados "noise," kledon "report, fame;" O.H.G. halan, O.N. kalla "to call;" O.E. hlowan "to low;" Lith. kalba "language").

Gâhšomâr, gâhšomâri, gâhmâr from gâh "time," Mid.Pers. gâh, gâs, + šomâr, mâr "reckoning," → calculate.
Sâlnâmé, from sâl, → year, + nâmé "a writing, letter, book."

calendar day
  روز ِ گاهشماری، ~ گاهماری   
ruz-e gâhšomâri, ~ gâhmâri

Fr.: jour du calendrier   

A period of 24 hours, from one midnight to the following midnight.

calendar; → day.

calendar month
  ماه ِ گاهشماری، ~ گاهماری   
mâh-e gâhšomâri, ~ gâhmâri

Fr.: mois du calendrier   

One of the periods into which a calendar is divided, ordinarily 12, but in earlier systems 10 (the first Roman calendar under Romulus) or 13 (ancient Iranian calendar using a month intercalation).

calendar; → month.

calendar year
  سال ِ گاهشماری، ~ گاهماری   
sâl-e gâhšomâri, ~ gâhmâri

Fr.: année du calendrier   

The time interval between the new year's day in a given calendar system and the day before the following new year's day. In the Gregorian system the calendar year begins on January 1 and ends on December 31. In the Iranian calendar it begins on Farvardin 1, the day closest to the spring equinox and ends on Esfand 29 or 30.

calendar; → year.

  گوگ، گوساله   
gug (#) , gusâlé (#)

Fr.: veau   

Young of a bovine animal,

M.E., from O.E. cealf, calf, cognate with M.Du. calf, Ger. Kalb, Gothic kalbo.

Gug (Dehxodâ), variant gog "calf;" probably from Proto-Ir. *gao-ka "baby cow, little caow," from *gao- "cow, bull," → cow, + suffix -*ak.
Gusâlé, literally "young in years," from gu, → cow, + sâl, → year.


Fr.: étalonner   

To adjust or determine, by comparison with a standard, the response magnitude of a measuring instrument as a function of the input signal. For example, to determine line wavelengths in the spectrum of an astronomical object, or to graduate a hygrometer.

From M.Fr. calibre, via Sp. or It., from Ar. qalib "a mold, last," perhaps from Gk. kalopodion "a shoemaker's last," from kalon "wood" + podos gen. of pous "foot."

Kabizidan, verbal form of kabiz (varianats kaviz, kaviž, kafiz) "a measure for grain, a bushel," from Mid.Pers. kabiz "a grain measure," loaned in Arm. kapic "a grain measure," and in Gk. kapithe, as attested in Xenophon.


Fr.: étalonnage, calibration   

1) The act or process of calibrating or the state of being calibrated.
2) A set of graduations that show positions or values.

Calibration, noun from → calibrate.

Kabizeš, noun from kabizidan, → calibrate.

calibration curve
  خمِ کبیزش   
xam-e kabizeš

Fr.: courbe d'étalonnage   

An empirical curve obtained through appropriate exposures in order to determine the instrument's response. For example, a curve allowing the conversion of relative intensities of an observed object into absolute fluxes, or a curve relating the detector's pixel positions to wavelengths.

calibration; → curve.

calibration error
  ایرنگِ کبیزش   
irang-e kabizeš

Fr.: erreur d'étalonnage   

A systematic error in the constant values to be applied to a measuring instrument.

calibration; → error.

Irang, → error; kabizeš, → calibration.

calibration exposure
  نوردادِ کبیزش   
nurdâd-e kabizeš

Fr.: pose d'étalonnage   

An exposure obtained with an instrument mounted on the telescope using an artificial illuminating source in order to calibrate the instrument.

calibration; → exposure.

Nurdâd, → exposure; kabizeš, → calibration.

calibration lamp
  لامپِ کبیزش   
lâmp-e kabizeš

Fr.: lampe d'étalonnage   

A lamp used for instrument calibration, such as an internal He-Ar arc for wavelength calibration or an external source of light placed in the telescope dome for flat-field exposures.

calibration; lamp, from O.Fr. lampe, L. lampas, from Gk. lampas "torch, lamp, light, meteor," from lampein "to shine."

Kabizeš, → calibration; lâmp, from Fr., as above.


Fr.: étalon   

A general term for certain reference astronomical sources that allow determining the characteristics (magnitude, distance, velocity, etc.) of other sources. → primary calibrators, → secondary calibrators.

Calibrator, from → calibrate + → -or.

Kabizandé, agent noun from kabizidan, → calibrate.

Callisto (Jupiter IV)
Kâlisto (#)

Fr.: Callisto   

The eighth of → Jupiter's known moons and the second brightest and the outermost of the four → Galilean satellites. With a diameter of 4800 km (0.38 Earths), Castillo is roughly the same size as Mercury. It orbits Jupiter in 16.689 days at a distance of 1,883,000 km from the planet, beyond Jupiter's main → radiation belts. It is the third largest moon in the entire solar system. Its mass is 10.76 × 1022 kg (about 1.5 Earth Moons) and its mean → surface temperature is -155 °C. The most prominent feature of Callisto is its craters, as it has the most craters of any object in the solar system. Due to its orbit being further away from Jupiter, it is not under the same → tidal heating influences as → Io, → Europa, or → Ganymede. Callisto's thin → atmosphere is composed of → carbon dioxide and likely some → molecular oxygen. Callisto is thought to have formed as a result of slow → accretion from the → protoplanetary disk of gas and dust that surrounded Jupiter after its formation.

Callisto, an attendant of Artemis in Greek mythology. Because of her love affair with Zeus, she was transformed into a bear by Artemis. According to another legend she was changed into a bear by the jealous Hera. Zeus transferred her to the heavens as the → constellation  → Ursa Major (great bear).

<< < -ci cal cal can car car Cas cat cau cel Cen CER Cha cha Che che chr cir cir civ cla clo clo CNO coa coe coi 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 CP cre cri cro cub cur cya cyl > >>