# 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: 1965 Search : ion
 instantaneous acceleration   شتاب ِ لحظه‌ای   šetâb-e lahze-yiFr.: accélération instantanée   The → acceleration of a particle at time t defined by a = lim Δv/Δt = dv/dt. It is the limiting value of Δv/Δt at time t as both Δv and Δt approach zero. instigation   آغالش   âqâleš (#)Fr.: incitation   The act of instigating; incitement.Verbal noun of → instigate. instrumental response function   کریای ِ پاسخ ِ سازال   karyâ-ye pâsox-e sâzâlFr.: fonction de la réponse instrumentale   The mathematical form of the way an instrument affects the input signal.→ instrumental; → response; → function. instrumentation   ۱) سازالگری؛ ۲) سازالگان   1) sâzâlgari; 2) sâzâlgânFr.: instrumentation   1) The design and use of scientific instruments for detection, measurement, control, computation, and so on. 2) The ensemble of instruments contained in a given machine or system.From → instrument + -ation a combination of -ate and -ion, used to form verbal nouns.Sâzâlgari, noun from sâzâlgar, → instrumentalist. Sâzâlgân, with plurality suffix -gân. insulation   عایق‌کاری   âyeqkâri (#)Fr.: isolation   1) The act or fact of insulating. 2) Any material used to reduce or prevent the transfer of electricity, heat, cold, or sound.Verbal noun from → insulate. integer partition   پرکش ِ درسته   parkeš:-e dorosteFr.: partition des entiers   An expression of an integer nas the sum of one or more positive integers. The number of different partitions of n is denoted p(n). This function is called the partition function. For example, p(5) = 7, because 5 can be partitioned as: 5 = 5 = 4 + 1 = 3 + 2 = 3 + 1 + 1 = 2 + 2 + 1 = 2 + 1 + 1 + 1 = 1 + 1 + 1 + 1 + 1.→ partition; → integer. integral equation   هموگش ِ دُرُستالی   hamugeš-e dorostâliFr.: équation intégrale   An equation involving an unknown function that appears as part of an integrand.→ integral; → equation. integral function   کریای ِ دُرُستالی   karyâ-ye dorostâliFr.: fonction intégrale   A function whose image is a subset of the integers, i.e. that takes only integer values.→ integral; → function. integration   دُرُستالش، دُرُستال‌گیری   dorostâleš, dorostâlgiriFr.: intégration   In calculus the operation which consists of finding the areas enclosed by curves through the summations of infinitesimals. The inverse process of differentiation.Verbal noun of → integrate. integration time   زمان ِ دُرُستالش   zamân-e dorostâlešFr.: temps d'intégration   The time during which a detector integrates the incoming photons.→ integration; → time. intensification   درتنویش   dartanuyešFr.: intensification   The action of making or becoming stronger or more extreme.verbal noun of → intensify. intensity of radiation   درتنویی ِ تابش   datanuyi-e tâbešFr.: intensité de rayonnement   The rate of emitted energy from unit surface area through unit solid angle. The radiation from a surface has different intensities in different directions.→ intensity; → radiation. interaction   اندرژیرش   andaržirešFr.: interaction   General: Mutual or reciprocal action or influence. Physics: 1) What happens between a system and its surroundings when an observable change in one corresponds to or correlates with an observable change in the other. 2) The natural phenomenon of the transfer of energy between two particles. The four known kinds of interactions, in the order of increasing strength, are: → gravitational, → weak, → electromagnetic, and → strong.Interaction, from → inter-; + → action. interactional   اندرژیرشی   andaržirešiFr.:   Capable of acting on or influencing each otherFrom → interaction; + → -al. interarm region   ناحیه‌ی ِ اندربازو، ~ ِ اندر-ا َرم   nâhiye-ye andarbâzu, ~ andararmFr.: région interbras   A low-density region separating the spiral arms of a galaxy.Interarm, from → inter- + arm "body part," from O.E. earm "arm," from P.Gmc. *armaz (cf. M.Du., Ger. arm, O.N. armr, O.Fris. erm), from PIE base *ar- "to fit, join;" Mod.Pers. arm "arm, from the elbow to the shoulder;" Av. arma-, arəmo- "arm;" Skt. irma- "arm;" Gk. arthron "a joint," L. armus "shoulder;" → region.Andarbâzu, from andar-, → inter-, + bâzu "arm," from Mid.Pers. bâzûk "arm;" Av. bāzu- "arm;" cf. Skt. bāhu- "arm, forearm;" Gk. pechys "forearm, arm, ell;" O.H.G. buog "shoulder;" Ger. Bug "shoulder;" Du. boeg; O.E. bôg, bôh "shoulder, bough;" E. bough " a branch of a tree;" PIE *bhaghu- "arm"); nahiyé, → region. Andararm, from andar-, → inter-, + arm, as above. intercalation   اندرهل   andarhelFr.: intercalation   The act of intercalating; insertion. Something that is intercalated. Astro.: An insertion into a calendar, → intercalate. Geology: The presence of a body of rock interbedded with another body of different rock.The verbal noun of → intercalate. interconnection   اندر-هابند، اندر-هابندش   andar-hâband, andar-hâbandešFr.: interconnexion   Reciprocal connection between two or several things.→ andar-; → connection. interconnection line   خط ِ اندر-هابندی   xatt-e andar-hâbandiFr.: raie semi-interdite   In spectroscopy, same as → semi-forbidden line.→ interconnection; → line. intergalactic absorption   درشم ِ اندرکهکشانی   daršam-e andarkahkešâniFr.: absorption intergalactique   → Absorption features in the spectra of bright sources like → quasars attributed to a tenuous matter filling the medium between galaxies. internal absorption   درشم ِ درونی   daršam-e daruniFr.: absorption interne   Of an → H II region, the absorption of photons by the dust which is mixed with ionized gas, in contrast to the absorption by the → interstellar dust on the line of sight.→ internal; → absorption.