# 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: 49 Search : near
 nonlinear device   دستگاه ِ ناخطی   dastgâh-e nâxattiFr.: dispositif non-linéaire   An electronic device whose output is not directly proportional to its input. For example, in a → diode the current is a nonlinear function of the voltage; its voltage-current characteristics do not obey → Ohm's law.→ nonlinear; → device. nonlinear dynamics   توانیک ِ ناخطی   tavânik-e nâxattiFr.: dynamique non-linéaire   Same as → chaos.→ nonlinear; → dynamics. nonlinear instability   ناپایداری ِ ناخطی   nâpâydâri-ye nâxattiFr.: instabilité non-linéaire   The instability of a physical or mathematical system that arises from the nonlinear nature of relevant variables and their interactions within the system.→ nonlinear; → instability. nonlinear system   راژمان ِ ناخطی   râžmân-e nâxattiFr.: système non-linéaire   A system in which small changes can result in large effects, and large changes in small effects.→ nonlinear; → system. nonlinearity   ناخطیگی   nâxattigiFr.: non-linéarité   The property, condition, or state of being → nonlinear.→ non-; → linearity. quasi-linear theory   نگره‌ی ِ چونان-خطی   negare-ye cunân-xattiFr.: théorie quasi-linéaire   In plasma physics, the theory that considers the interactions between waves and particles are of first order only. It ignores all terms of second order in the fluctuating quantities.→ quasi-; → linear; → theory. rectilinear   راست-خط   râst-xatt (#)Fr.: rectiligne   In a straight line; consisting of straight lines. → curvilinearFrom recti- combining form of rectus, → right, + → line + -ar, variant of the adjective-forming suffix → -al.Râst-xatt, from râst, → right, + xatt→ line. rectilinear propagation of light   توچش ِ راست‌خط ِ نور   tuceš-e râst-xatt-e nurFr.: propagation rectiligne de la lumière   The motion of light in the first approximation, as evidenced from the formation of shadows and other every day experience. However, → diffraction→ rectilinear; → propagation; → light. rectilinear system   راژمان ِ راست‌خط   râžmân-e râst-xattFr.: système rectilinéaire   An optical system that is corrected for → distortion and → spherical aberration and therefore forms the image of a straight line as a straight line.→ rectilinear; → system.

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