# 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: 141 Search : system
 Hindu-Arabic numeral system   راژمان ِ عددهای ِ هندی-عربی   râžmân-e adadhâ-ye Hendi-ArabiFr.: numération indo-arabe   Same as → Indian numeral system.→ numeral; → system. holonomic system   راژمان ِ هروداتیک   râžmân-e harudâtikFr.: système holonomique   A material system in which the → constraints can be expressed in the form of an equation relating the coordinates.From Gk. → holo- "whole" + -nomic, related to nomos "law, managing, governing, custom," → -nomy; → system. horizon coordinate system   راژمان ِ هم‌آراهای ِ افقی   râžmân-e hamârâhâ-ye ofoqiFr.: coordonnées horizontales   The coordinate system based on the position of the observer. The horizontal plane is the fundamental plane and the coordinates are → altitude and → azimuth.→ horizon; → coordinate; → system. horizon system   راژمان ِ افقی   râžmân-e ofoqiFr.: coordonnées horizontales   Same as → horizon coordinate system.→ horizon; → system. Indian numeral system   راژمان ِ عددهای ِ هندی   râžmân-e adahâ-ye HendiFr.: numération indienne   The → numeral system consisting of the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 which evolved into the system we use today. The Indian numerals was a place-value or positional system. The Indians were the first to develop a base 10 positional system. Same as → Hindu-Arabic numeral system.Indian, from India, → Indus; → numeral; → system. International System of Units (SI)   راژمان ِ جهانی ِ یکاها   râžmân-e jahâni-ye yekâhâFr.: système international des unités   The metric system of units based on the → meter, → kilogram, → second, → ampere, → kelvin, and → candela. Also called MSKA system. Other SI units are → hertz, → radian, → newton, → joule, → watt, → coulomb, → volt, → ohm, → farad, → weber, and → tesla.→ international; → system; → unit. intersystem   اندر-راژمان   andar-râžmânFr.: inter-système   Describing something that involves mutual relations between systems.→ inter-; → system. intersystem crossing   گذر ِ اندر-راژمانی   gozar-e andar-râžmâniFr.: conversion intersystème   A → radiationless relaxation process in which a molecule in some excited → electronic state converts to a state of different spin → multiplicity. Intersystem crossing is analogous to → internal conversion.→ intersystem; → crossing. intersystem line   خط ِ اندر-راژمانی   xatt-e andar-râžmâniFr.: raie semi-interdite   In spectroscopy, same as → semi-forbidden line.→ inter-; → system. isolated system   راژمان ِ وایوتیده   râžmân-e vâyutidéFr.: système isolé   Thermodynamics: A system which has no exchange of energy or matter with surroundings. The internal energy of such a system remains constant. → closed system; → open system.→ isolated; → system. JHK system   راژمان ِ JHK   râžmân-e JHKFr.: système JHK   1) Three → atmospheric windows in the → near infrared portion of the → electromagnetic spectrum at 1.25 (J), 1.65 (H), and 2.20 (K) μm. 2) An extension of Johnson's → photometric system into near infrared using filters corresponding to the atmospheric windows J (1.25 μm), H (1.65 μm), and K (2.20 μm), with → bandwidths 0.3 μm, 0.4 μm, and 0.6 μm respectively.Letters of alphabet, used conventionally; → system. lens system   راژمان ِ عدسی   râžmân-e adasiFr.: système de lentilles   → lens; → system. linear system   راژمان ِ خطی   râžmân-e xattiFr.: système linéaire   Physics: A → dynamical system whose evolution is a linear process. If a change in any variable at some initial time produces a change in the same or some other variable at some later time, twice as large a change at the same initial time will produce twice as large a change at the same later time.→ linear; → system. Magellanic System   راژمان ِ ماژلانی   râžmân-e MagellaniFr.: système magellanique   A system consisting of the → Magellanic Clouds, the → Magellanic Bridge, and the → Magellanic stream. mechanical system   راژمان ِ مکانیکی   râžmân-e mekânikiFr.: système mécanique   1) Any system of elements that interact according to the laws of → mechanics (as distinguished from chemical, electrical, thermal, etc.). 2) A collection of → machines functioning together to achieve the transfer of motion.→ mechanical; → system. metric system   راژمان ِ متری   râšmân-e metriFr.: système métrique   A standard system of measurement using decimal units, in which the units of length, time, and mass are meter, second, and kilogram respectively.→ metric; → system. Milky Way system   راژمان ِ راه ِ شیری   râžmân-e râh-e širiFr.: Voie lactée   The huge star system of which the Sun is a member. Same as the Galaxy or the Milky Way galaxy.→ Milky Way; → system. MK system      Fr.:   A system of stellar → spectral classification. The same as → Morgan-Keenan classification. Also called MKK system, → Yerkes system. MKS system   راژمان ِ MKS   râžmân-e MKSFr.: système MKS   The system of → MKS units.→ MKS unit; → system. multiplanet system   راژمان ِ بس-سیاره‌ای   râžmân-e bas-sayâre-yiFr.: système multi-planète   A stellar system with more than one orbiting planet.→ multi-; → planet; → system.