# 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: 742
 residue theorem   فربین ِ مونک‌ها   farbin-e munakhâFr.: théorème des résidus   The theorem stating that the value of the line integral of a complex function, taken along a simple closed curve encircling a finite number of isolated singularities, is given by 2πi times the sum of the residues of the function at each of the singularities.→ residue; → theorem. resign   واگامیدن   vâgâmidanFr.: démisionner   To give up an office or position, often formally.M.E. resignen "give up, surrender, abandon; relinquish," from O.Fr. resigner "renounce, relinquish," from L. resignare "to check off, cancel, give back, give up," from → re- "opposite" + signare "to make an entry in an account book," literally "to mark;" → sign.Vâgâmidan, literally "to step back," from vâ-→ re- + gâmidan "to step, go, → walk." resignation   واگامش   vâgâmešFr.: démision   The act of resigning.Verbal noun from → resign. resist   بر‌ایستادن، ایستادگی کردن   baristâdan (#), istâdegi kardan (#)Fr.: résister   To withstand the action or effect of; to strive against, or oppose.M.E. resisten, O.Fr. resister, from L. resistere "to resist, to stand back, withstand," from → re- "against" + sistere "take a stand, stand firm," cognate with Pers. istâdan, as below.Baristâdan "to withstand, to stand in opposition," from bar- opposition prefix, → object, + istâdan "to stand," → solstice. Istâdegi kardan, composite verb, from istâdegi "resistance," state noun from istâdan, + kardan "to do, to make," → -or. resistance   بر‌ایستگری، ایستادگی   baristgari, istâdegi (#)Fr.: résistance   1) General: The act or power of resisting, opposing, or withstanding. 2) Electricity: A property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat. It is the quantity that determines the current that results due to a voltage in a simple circuit. For a fixed voltage, if the resistance increases, the current decreases. It is given by the equation R = ΔV/I, where ΔV is the voltage difference and I the current. Resistance has the SI units volts per ampere, called → ohm.From → resist + -ance a suffix used to form nouns either from adjectives in -ant or from verbs.Baristgari, from baristgar, → resistant. Istâdegi "resistance," state noun from istâdé "stood," p.p. of istâdan "to stand," → resist. resistant   بر‌ایست‌گر، ایستادگی‌گر   baristgar, istâdegigarFr.: résistant   1) Characterized by or showing resistance. 2) A person or thing that resists.Present participle of → resist, with -ant a suffix forming adjectives and nouns from verbs.Baristgar, from barist present stem of baristâdan, → resist, + -gar, agent suffix, → -or. Istâdegigar, from istâdegi, → resistance, + -gar. resistive   بر‌ایست‌مند   baristmandFr.: résistif   Capable of or inclined to resistance; resisting.From resist, → resistance, + → -ive.Baristmand, from barist present stem of baristâdan, → resist + -mand possession suffix, → -ist. resistivity   بر‌ایست‌مندی   baristmandiFr.: resistivité   A property of a → conductor which is defined as the ratio of the → electric intensity (E) to the → current density (J): ρ = E/J. The greater the resistivity, the greater the intensity needed to establish a given current density, or the smaller the current density for a given intensity. A "perfect" conductor would have zero resistivity, and a "perfect" → insulator an infinite resistivity.From → resistive + → -ity. resistor   بر‌ایستنده   baristandéFr.: résistance   An electrical component used to introduce a known value of resistance into a circuit.→ resist; → -or. resolution   واگشود   vâgošudFr.: résolution   1) The degree to which an → optical system renders visible separate parts of an object. Also known as → angular resolution and → spatial resolution. See also → spectral resolution. 2) The time interval between successive discernible signals. → temporal resolution.Verbal noun of → resolve. resolution of a force   واگشود ِ نیرو   vâgošud-e niruFr.: résolution de force   Finding the → components of a → force which act in specified → directions.→ resolution; → force. resolve   واگشودن   vâgošudanFr.: résoudre   To separate and make visible the individual parts of an → image or → spectral feature.M.E. resolven, from L. resolvere "to loosen, undo, settle," from → re- + solvere "to loosen," → solve.Vâgošudan, from prefix vâ-, → re-, + gošudan, gošâdan "to loose, open up, let free;" gošâd "opened; ample, broad;" Mid.Pers. wišâdan "to let free;" Khotanese hīyā "bound;" O.Pers. višta "untied, loosened," vištāspa- "with loosened horses" (personal name); Av. višta "untied," ā-hišāiiā "holds fettered," hita- "fastened, tied on, put to;" cf. Skt. sā- "to bind, fasten, fetter," sitá- "bound," ví-sita- "untied." resolved   واگشوده   vâgošudéFr.: résolu   Separated and made visible in an → image or → spectral feature. → resolved line.Past participle of → resolve. resolved line   خط ِ واگشوده   xatt-e vâgošudéFr.: raie résolue   A → spectral line that is not contaminated by other nearby lines.→ resolved; → line. resolving power   توان ِ واگشود   tavân-e vâgošudFr.: pouvoir de résolution, pouvoir séparateur   A measure of an optical system's ability to produce an image which separates two points or parallel lines on the object.Resolving verbal adj. of → resolve; → power. resonance   باز‌آوایی   bâzâvâyi (#)Fr.: résonance   1) The state of a → mechanical system in which the → amplitude of → oscillation is increased when it is subjected to stimulus from another source at or near its own natural → frequency. 2) The condition of an electrical circuit with respect to a given frequency in which the net reactance is zero and the current flow a maximum. 3) A relationship in which the → orbital period of one body is related to that of another by a simple integer fraction, such as 1/2, 2/3, 3/5. → Laplace resonance, → Lindblad resonance, → resonance orbit . 4) → resonance particle.Resonance, from M.Fr. resonance, from L. resonantia "echo," from resonare "to resound," from re- "again, back" + sonare "to sound."Bâzâvâyi, from bâz- "again, back," → re-, + âvâ "voice, sound" (related to âvâz "voice, sound, song," bâng "voice, sound, clamour" (Mid.Pers. vâng), vâžé "word;" Av. vacah- "word," vaocanghê "to decalre" (by means of speech), from vac- "to speak, say;" cf. Skt. vakti "speaks, says," vacas- "word;" Gk. epos "word;" L. vox "voice;" PIE base *wek- "to speak") + -yi noun suffix. resonance capture   گیر-اُفت ِ باز‌آوایی   gir-oft-e bâzâvâyiFr.: capture résonante   Capture by an atomic nucleus of a particle whose energy is equal to one of the energy levels of the nucleus.→ resonance; → capture. resonance frequency   بسامد ِ باز‌آوایی   basâmad-e bâzâvâyiFr.: fréquence de résonance   The frequency at which a system is in → resonance.→ resonance; → frequency. resonance line   خط ِ باز‌آوایی   xatt-e bâzâvâyiFr.: raie de résonance   For a particular atom, the spectral line corresponding to the longest wavelength arising from a transition between the ground state and an excited state.→ resonance; → line. resonance orbit   مدار ِ باز‌آوایی   madâr-e bâzâvâyiFr.: orbite de résonance   An orbit which is in → orbital resonance with another orbit.→ resonance; → orbit.