# 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: 17 Search : order
 disorder   بیرایگی   birâyegiFr.: désordre   A lack of → order. See → entropy.→ dis-; → order.Birâyegi, from birâyé, → disordered, + -(g)i noun suffix. disordered   بیرایه   birâyéFr.: déordonné   Lacking → order.→ disorder + -ed.Birâyé, from bi- "without," → a-, + râyé, → order. first-order differential equation   هموگش ِ دگرسانه‌ای ِ رایه‌ی ِ نخست   hamugeš-e degarsâne-yi-ye râye-ye naxostFr.: équation différentielle du premier ordre   A → differential equation containing only the first → derivative. For example, dy/dx = 3x and 2y(dy/dx) + 3x = 5.→ first; → order; → differential; → equation. first-order logic (FOL)   گوییک ِ فراسنی ِ رایه‌ی ِ نخست، ~ فراسنهای ِ ~ ~   guyik-e farâsani-ye râye-ye naxost, ~ farâsanhâ-ye ~ ~Fr.: logique des prédicats du premier ordre   A system of → formal logic that is an extension of → propositional logic. It is also known as → first-order predicate calculus and → predicate logic. FOL eliminates deficiencies of propositional logic by: representing → objects (their properties, relations and statements about them), introducing → variables, and introducing → quantifiers.→ first; → order; → predicate; → logic. first-order partial derivative   واخنه‌ی ِ پاری ِ رایه‌ی ِ نخست   vâxane-ye pâri-ye râye-ye naxostFr.: dérivée partielle du premier degré   For a → function with several → variables, the derivative, done only once, with respect to one of the variables. For example ∂u/∂x for u = u(x,y).→ first; → order; → partial; → derivative. first-order predicate calculus   افماریک ِ فراسنی ِ رایه‌ی ِ نخست   afmârik-e farâsani-ye râye-ye naxostFr.: cacul des prédicats du premier ordre   Same as → first-order logic.→ first; → order; → predicate; → calculus. first-order spectrum   بیناب ِ رایه‌ی ِ نخست   binâb-e râye-ye naxostFr.: spectre du premier ordre   An optical spectrum, produced by a diffraction grating, in which the difference in path length of light from adjacent slits is one wavelength.→ first; → order; → spectrum. interference order   رایه‌ی ِ اندرزنش   râye-ye andarzanešFr.: ordre d'interférence   → interference; → order. order   ۱) رایه؛ ۲) رایاندن   1) râyé; 2) râyândanFr.: 1) ordre; 2) ordonner   1a) General: The way in which several items are arranged, as an indication of their relative importance or size or when each will be dealt with. 1b) Optics: → order of interference. 1c) Math.: The number of rows or columns of a → square matrix or → determinant. 1d) Math.: The highest → derivative appearing in a given → differential equation. For example, d2y/dx2 + 2y (dy/dx) - 3 = 0 is a differential equation of order two. 2) To arrange, regulate, or dispose things in their proper places. See also: → disorder, → first-order differential equation, → first-order partial derivative, → first-order spectrum, → interference order, → order of a tensor, → order of interference, → order of magnitude.From O.Fr. ordre, from earlier ordene, from L. ordinem (nominative ordo) "row, rank, arrangement."Râyé, noun related to râyânidan "to regulate, set in order," from Mid.Pers. râyânīdan "to arrange, organize," from rây- (Mod.Pers. ârây-, ârâyeš, ârâyidan "to arrange, adorn"), ârây-, ârâstan "to arrange, adorn;" O.Pers. rād- "to prepare," rās- "to be right, straight, true," rāsta- "straight, true" (Mod.Pers. râst "straight, true"); Av. rāz- "to direct, put in line, set," razan- "order;" Gk. oregein "to stretch out;" L. regere "to lead straight, guide, rule," p.p. rectus "right, straight;" Skt. rji- "to make straight or right, arrange, decorate;" PIE base *reg- "move in a straight line;" see also → direct. order of a graph   رایه‌ی ِ نگاره   râye-ye negâréFr.: ordre de graphe   The → number of → vertices.→ order; → graph. order of a tensor   رایه‌ی ِ تانسور   râye-ye tânsorFr.: ordre de tenseur   The maximum number of the indices (→ index) of a tensor.→ order; → tensor. order of interference   رایه‌یِ اندرزنش   râye-ye andarzanešFr.: ordre d'interfrérence   A whole number which characterizes a particular position of an interference fringe according to whether there is interference arising from one, two, three, etc. wavelength difference of path. Same as → interference order→ order; → interference. order of magnitude   رایه‌یِ بُرز   râye-ye borzFr.: ordre de grandeur   Value of a number or of a physical quantity given roughly, usually expressed as a power of 10. Thus, 2.5 x 105 and 6.4 x 105 are of the same order of magnitude, and 2 x 107 is 2 orders of magnitude greater than either.→ order; → magnitude. ordered   بارایه، رایه‌دار   bârâyé, râyedârFr.: ordonné   Characterized by → order; arranged according to a rule. → ordered tree.→ order + -ed. ordered tree   درخت ِ بارایه   deraxt-e bârâyéFr.: arbre ordonné   In → graph theory, a → tree in which the → children of each → vertex are ordered.→ ordered; → tree. second-order logic   گوییک ِ رایه‌ی ِ دوم   guyik-e râye-ye dovomFr.: logique du seconde ordre   An n extension of → first-order logic that quantifies not only → variables that range over → individuals, but also quantifies over → relations.→ second; → order; → predicate; → logic. well-ordered set   هنگرد ِ خوش‌رایه   hangard-e xoš-râyéFr.: ensemble bien ordonné   A set in which every → nonempty → subset has a minimum element.→ well; → order; → set.