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consideration âgâreš Fr.: considération The act or an instance of considering. |
constant of aberration pâyâ-ye birâheš Fr.: constante d'aberration The maximum amount of the apparent yearly displacement of a star, resulting from the → aberration of starlight. The value of the constant of aberration, κ, at J2000.0 is 20".49552. κ = (v/c) csc 1", where v is the average speed of the Earth about the Sun and c is the → speed of light in vacuum. The Earth's speed is given by: v = 2πa / [P(1 - e^{2})^{1/2}], where a is the → semi-major axis of the Earth's orbit, e is the → eccentricity of the Earth's orbit, and P is the → sidereal period of the Earth. Same as → constant of annual aberration. See also → constant of diurnal aberration. → constant; → aberration. |
constant of annual aberration pâyâ-ye birâheš sâlâné Fr.: constante d'aberration annuelle Same as → constant of aberration. → constant; → annual; → aberration. |
constant of diurnal aberration pâyâ-ye birâheš ruzâné Fr.: constante d'aberration diurne The quantity 0''.3200 ρ cos φ', where ρ is the geocentric distance of the observer measured in units of → equatorial radius the Earth and φ' is the observer's → geocentric latitude. The numerical part is equal to 2πa csc1'' / (cP), where a is the equatorial radius of the Earth, P is its → sidereal period of rotation, and c is the → speed of light in vacuum. → constant; → diurnal; → aberration. |
constant of gravitation pâyâ-ye gerâneši (#) Fr.: constante de la gravitation |
constant of the motion pâyâ-ye jonbeš Fr.: constante de mouvement 1) Classical mechanics: A variable X whose total rate of change dX/dt
along the path of a → dynamical system is zero. In other words,
a function of an object's position, velocity, or both that does not change even as the
object moves. For example, the total energy of a
→ simple harmonic oscillator is a constant of the motion. |
constellation hamaxtarân Fr.: constellation A grouping of conspicuous stars that, when seen from Earth, form an apparent pattern. The sky is divided into 88 constellations. → asterism. From O.Fr. constellation, from L.L. constellationem (nom. constellatus) "set with stars," from L. → com- "with" + p.p. of stellare "to shine," from stella, → star. Hamaxtarân, from ham- "with, together" + axtar→ star + -ân suffix denoting group. |
constitution âsâteš Fr.: constitution 1) The act or process of composing, setting up, or establishing. Verbal noun of → constitution. |
constitutional âsâteši Fr.: constitutionnel 1) Of or relating to a constitution. → constitution; → -al. |
consultation hagâreš Fr.: consultation The act or procedure of consulting. Verbal noun from → consult. |
consumption gosâreš Fr.: consommation 1) The act of consuming. Verbal noun of → consume. |
contemplation darnegareš (#) Fr.: contemplation The act of contemplating; thoughtful observation. Verbal noun of → contemplate. |
continuation peydâšt; peydâd Fr.: continuation The act or state of continuing; the state of being continued. |
continued fraction 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. |
continuous function karyâ-ye peyvasté Fr.: fonction continue The function y = f(x) is called continuous at the point x = x_{0} if it is defined in some neighborhood of the point x_{0} and if lim Δy = 0 when Δx → 0. → continuous; → function. |
continuum emission 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. |
contraction terengeš Fr.: contraction An act or instance of contracting; the quality or state of being contracted. Verbal noun of → contract. |
contradiction pâdguyi (#) Fr.: contradiction 1) The act of contradicting; assertion of the contrary or opposite. 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. |
contribution hambâžeš Fr.: contribution 1) The act of contributing. Verbal noun of → contribute. |
convection hambaz, hambord (#) Fr.: convection In general, mass motions within a → fluid resulting in transport and mixing of the properties of that fluid when the temperature gradient exceeds some critical value. Convection, along with → conduction and → radiation, is a principal means of → energy transfer. → Schwarzschild's criterion. From L. convectionem "the act of carrying," from p.p. stem of convehere "to carry together," from → com- "together" + vehere "to carry," cf. Skt. vah- "to carry, lead," vahitra "vehicle," Av. vazaiti "to lead," Mid.Pers. waz-, wazidan "to carry away," Gk. oxos "chariot;" PIE base *wegh- "to go, carry, drive" Hambaz, from ham- "together" + baz "to carry, move,"
→ evection. |
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