A small electronic device that performs calculations.
Afmârgar, from afmâr→ calculate + -gar agent suffix, from kar-, kardan "to do, to make" (Mid.Pers. kardan, O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "makes," cf. Skt. kr- "to do, to make," krnoti "makes," karma "act, deed;" PIE base kwer- "to do, to make").
Fr.: calcul différentiel et intégral
L. calculus "small stone," from calx, calcis "limestone," → calculate, + -ulus diminutive suffix, → -ule.
calculus of finite differences
afmârik-e degarsânihâ-ye karânmand
Fr.: calcul des différences finies
calculus of probabilities
Fr.: calcul des probabilités
A branch of mathematics that deals with the calculation of the probabilities of events.
calculus of residues
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 of tensors
Fr.: calcul tensoriel
The branch of mathematics dealing with the differentiation of tensors.
calculus of variations
Fr.: calcul des variations
The study of maximum and minimum properties of → definite integrals.
calculus of vectors
Fr.: calcul vectoriel
The area of calculus dealing with differentiation and integration of vector-valued functions; a sub-area of tensor calculus.
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.
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.
1) gâhšomâr (#), gâhšomâri (#), gâhmâr; 2) sâlnâmé (#)
1) Any of various systems for measuring and recording the passage of time
by dividing the year into days, weeks, and months.
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").
ruz-e gâhšomâri, ~ gâhmâri
Fr.: jour du calendrier
A period of 24 hours, from one midnight to the following midnight.
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).
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.
1) gug (#), gusâlé (#); 2) poviz
Fr.: 1) veau; 2) mollet
M.E., from O.E. cealf, calf, cognate with M.Du. calf, Ger. Kalb, Gothic kalbo.
1) Gug (Dehxodâ), variant gog "calf;" probably from Proto-Ir.
*gao-ka "baby cow, little caow," from *gao-
"cow, bull," → cow, + suffix -*ak.
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.
Calibration, noun from → calibrate.
Kabizeš, noun from kabizidan, → calibrate.
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.
Fr.: erreur d'étalonnage
A systematic error in the constant values to be applied to a measuring instrument.
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.