# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 25 Search : vector
 calculus of vectors   افماریک ِ بردارها   afmârik-e bordârhâFr.: 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. eigenvector   ویژبردار   viž-bordârFr.: vecteur propre   Math.: A nonzero vector v whose direction is not changed by a given linear transformation T; that is, T(v) = λ v for some scalar λ.→ eigenfunction; → vector. Killing vector   بردار ِ کیلینگ   bordâr-e KillingFr.: vecteur de Killing   A → vector field on a → Riemannian manifold (or → pseudo-Riemannian manifold) that preserves the → metric. In other words, the → derivative of the metric with respect to this vector field is null.Named after the German mathematician Wilhelm Killing (1847-1923); → vector. magnetic vector potential   توند ِ برداری ِ مغناتیسی   tavand-e bordâri-ye meqnâtisiFr.: vecteur potentiel magnétique   A vector field A defined so that the → magnetic field  B is given by its → curl: B = ∇ x A.→ magnetic; → vector; → potential. orthogonal vectors   بردارهای ِ ارداکنج   bordârhâ-ye ardâkonjFr.: vecteurs orthogonaux   Two non-zero vectors which are perpendicular, i.e. their → scalar product is zero.→ orthogonal; → vector. orthonormal vectors   بردارهای ِ ارداهنجارور   bordârhâ-ye ardâhanjârvarFr.: vecteurs orthonormaux   Two non-zero vectors that are → orthogonal and have magnitude 1.→ orthogonal; → vector. Poynting vector   بردار ِ پوینتینگ   bordâr-e PoyntingFr.: vecteur de Poynting   The amount of electromagnetic energy flowing through unit area, perpendicular to the direction of energy propagation, per unit time, given by (c/2 π)[E x H]. → Poynting's theorem. radius vector   بردار ِ شعاعی   bordâr-e šo'â'i (#)Fr.: rayon vecteur   Math.: In a system of polar or spherical coordinates, a line joining a point to the origin. Astro.: A line drawn from a central body to a satellite object in any position in its orbit.→ radius; → vector. reddening vector   بُردار ِ سرخش   bordâr-e sorxešFr.: vecteur de rougissement   A vector indicating the direction in which interstellar reddening moves the position of a star in a multi-dimensional space of color indices.→ reddening; → vector. relative vector   بردار ِ بازانی   bordâr-e bâzâniFr.: vecteur relatif   A → relative tensor of → order  → one.→ relative; → vector. tensor-vector-scalar (TeVeS) theory      Fr.:   A theory put forward to provide a basis for a relativistic generalization of the → MOdified Newtonian Dynamics (MOND) paradigm. TeVeS is based on three dynamical fields: a tensor field, a vector field, and a scalar field. In contrast to general relativity, it has two metrics, an Einstein metric and a physical metric. TeVeS has attracted considerable attention, since it can explain many galactic and cosmological observations without the need for → dark matter. Proposed by J. D. Bekenstein, 2004, "Relativistic gravitation theory for the modified Newtonian dynamics paradigm", Phys. Rev. D, 70, 083509, arXiv:astro-ph/0403694.→ tensor; → vector; → scalar; → theory. unit vector   بردار ِ یکا   bordâr-e yekâFr.: vecteur unité   A vector of length 1, also called a direction vector.→ unit; → vector. vector   بردار   bordâr (#)Fr.: vecteur   Any physical quantity which requires a direction to be stated in order to define it completely, for example velocity. Compare with → scalar.From L. vector "one who carries or conveys, carrier," from p.p. stem of vehere "carry, convey;" cognate with Pers. vâz (in parvâz "flight"); Av. vaz- "to draw, guide; bring; possess; fly; float," vazaiti "guides, leads" (cf. Skt. vah- "to carry, drive, convey," vahati "carries," pravaha- "bearing along, carrying," pravāha- "running water, stream, river;" O.E. wegan "to carry;" O.N. vegr; O.H.G. weg "way," wegan "to move," wagan "cart;" M.Du. wagen "wagon;" PIE base *wegh- "to drive").Bordâr "carrier," agent noun from bordan "to carry, transport" (Mid.Pers. burdan; O.Pers./Av. bar- "to bear, carry," barəθre "to bear (infinitive);" Skt. bharati "he carries;" Gk. pherein "to carry;" L. ferre "to carry;" PIE base *bher- "to carry"). vector analysis   آنالس ِ برداری   ânâlas-e bordâriFr.: analyse vectorielle   The study of → vectors and → vector spaces.→ vector; → analysis. vector angular velocity   بردار ِ تندای ِ زاویه‌ای   bordâr-e tondâ-ye zâviye-yiFr.: vecteur de vitesse angulaire   Of a rotating body, a vector of magnitude ω (→ angular velocity) pointing in the direction of advance of a right-hand screw which is turned in the direction of rotation.→ vector; → angular; → velocity. vector boson   بوسون ِ برداری   boson-e bordâriFr.: boson vectoriel   In nuclear physics, a → boson with the spin quantum number equal to 1.→ vector; → boson. vector calculus   افماریک ِ برداری   afmârik-e bordâriFr.: calcul vectoriel   The study of vector functions between vector spaces by means of → differential and integral calculus.→ vector; → calculus. vector density   چگالی ِ بردار   cagâli-ye bordârFr.: densité de vecteur   A → tensor density of → order 1.→ vector; → density. vector field   میدان ِ برداری   meydân-e bordâri (#)Fr.: champ vectoriel   A vector each of whose → components is a → scalar field. For example, the → gradient of the scalar field F, expressed by: ∇F = (∂F/∂x)i + (∂F/∂y)j + (∂F/∂z)k.→ vector; → field. vector function   کریای ِ برداری   karyâ-ye bordâriFr.: fonction vectorielle   A function whose value at each point is n-dimensional, as compared to a scalar function, whose value is one-dimensional.→ vector; → function.

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