An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < "no abe acc act aff ama ani ant aps ast atm aut bar bif Boh bou cal car Cen chi Cla col com com Com con con con con con con con con con con con con cor cor Cou cur dec def Den det dif dim dis dis dou E-t edi ele ell ene ero exa exp ext fer Fla fra FU Gam geo gra gra had har hig Hub Hyp imp ind inf ins int int ion iro ite Kep lar lep lin lon lun mag mas mer mig mol Moo mut neg new New non non non nuc obs on- opt Ori oxi par per per phl pho Pla ple pol pos pre Pro pro pub qua rad rad rec red reg rem res rev rot Sak Sco sec seg sha sim sol sou sph sta ste Str sub sup T a the Tho tra tre tum uni vel vis wav wor > >>

Number of Results: 3079 Search : on
interstellar extinction
  خاموشی ِ اندر-اختری   
xâmuši-ye andaraxtari

Fr.: extinction interstellaire   

The dimming of light traveling in the interstellar space due to the combined effects of absorption and scattering by interstellar dust particles. Interstellar extinction increases at shorter (bluer) wavelengths, resulting in → interstellar reddening.

interstellar; → extinction.

interstellar polarization
  قطبش ِ اندر-اختری   
qotbeš-e andaraxtari

Fr.: polarisation interstellaire   

The polarization of starlight caused by aligned → interstellar grains, so that initially → unpolarized light from a star is partially polarized by the time it reaches the Earth.

interstellar; → polarization.

interstellar radiation field
  میدان ِ تابش ِ اندر-اختری   
meydân-e tâbeš andaraxtari

Fr.: champ de rayonnement interstellaire   

A global ionizing radiation in the → interstellar medium provided by various sources all together.

interstellar; → radiation; → field.

interstellar scintillation
  سوسوی ِ اندر-اختری   
susu-ye andaraxtari

Fr.: scintillation interstellaire   

An apparent twinkling of the signals from distant point-like radio sources (pulsars). It is due to turbulence, i.e. fluctuations in the electron density of the interstellar ionized gas, through which the signals have passed on their way to Earth.

interstellar; → scintillation.

intervention
  اندرگم   
andargam

Fr.: intervention   

The act or fact of intervening.

M.E., from M.Fr. intervention, or directly from L.L., from L. intervenire "to come between, interrupt," from → inter-, + venire "to come," as below.

Andargam "coming between," from andar- "between," → inter-, + gam "to come;" cf. Av./O.Pers. gam- "to come; to go," Mod./Mid.Pers. gâm "step, pace," âmadan "to come;" cf. Skt. gamati "goes;" Gk. bainein "to go, walk, step;" L. venire "to come;" O.H.G. queman "to come;" E. come; PIE root *gwem- "to go, come."

intrinsic semiconductor
  نیم‌هازا‌ی ِ درونگین   
nimhâzâ-ye darungin ~

Fr.: semiconducteur intrinsèque   

A pure semiconductor containing no → impurity atoms. → extrinsic semiconductor.

intrinsic; → semiconductor.

introduction
  اندرهازش   
andarhâzeš

Fr.: introduction   

1) The act or process of introducing; the state of being introduced.
2) A part of a book or treatise preliminary to the main portion; a preliminary treatise or course of study (Merriam-Webster.com).

Verbal noun of → introduce; → -tion.

intuition
  درگس   
dargas

Fr.: intuition   

The immediate apprehension of knowledge through the use of the senses, without conscious reasoning or analysis. → intuitive, → intuitionism.

M.E., from L.L. intuitionem "a looking at, consideration," noun of action from p.p. stem of intueri "look at, consider," from → in- "at, on" + tueri "to look at, watch over."

Dargas, literally "looking at, consider," from dar-, → in-, + *gas "to look, appear;" cf. Parthian âgas "visible, apparent," pargas- "to observe, take care," related to negâh "look, attention," âgâh "aware, knowing;" Sogd. pcks- "to expect;" Proto-Ir. *kas- "to look, appear" (Cheung 2007).

intuitionism
  درگس‌باوری   
dargas-bâvari

Fr.: intuitionnisme   

A → philosophy of → mathematics that was introduced by the Dutch mathematician L.E.J. Brouwer (1881-1966). Intuitionism is based on the idea that mathematics is a creation of the mind. The truth of a mathematical statement can only be conceived via a mental construction that proves it to be true, and the communication between mathematicians only serves as a means to create the same mental process in different minds (Stanford Encyclopedia of Philosophy).

intuition; → -ism.

invention
  پراوش   
parâveš

Fr.: invention   

The action or of inventing or something invented.

Verbal noun of → invent.

inverse Compton effect
  ا ُسکر ِ کامپتون ِ وارون   
oskar-e Compton-e vârun

Fr.: effet Compton inverse   

A → scattering process by which fast-moving, energetic particles transfer energy to photons, decreasing the wavelength of the radiation.

inverse; → Compton effect.

inversion
  واگردانی، وارونش   
vâgardâni, vâruneš

Fr.: inversion   

Meteo.: A departure from the usual decrease or increase with altitude of the value of an atmospheric property. It almost always refers to a temperature inversion, i.e., an increase in temperature with altitude. Chemistry: To subject to → inversion.

Verbal noun of → invert.

inversion layer
  لایه‌ی ِ واگردانی   
lâye-ye vâgardâni

Fr.: couche d'inversion   

Meteo.: The atmospheric layer in which the temperature gradient is inverted, that is increases; → inversion. The inversion layer tends to prevent the air below it from rising, thus trapping any pollutants that are present.
Electricity: A converting of direct current into alternating current.

inversion; → layer.

inverted population
  پرینش ِ واگردانیده، ~ وارون   
porineš-e vâgardânidé, ~ vârun

Fr.: population inversée   

In atomic physics, a condition in which there are more electrons in an upper energy level than in a lower one, while under normal conditions of thermal equilibrium the reverse is true. → optical pumping.

Inverted, p.p. of → invert; → population.

invocation
  در-وچ، دروچ   
darvac

Fr.: invocation   

The act of invoking.

Verbal noun of → invoke.

ion
  یون   
yon (#)

Fr.: ion   

An atom that has lost or gained one or more electrons and has become electrically charged as the result.

Ion (introduced in 1834 by E. physicist and chemist Michael Faraday), from Gk ion " going," neut. pr.p. of ienai "to go," from PIE base *ei- "to go, to walk," eimi "I go;" cf. Pers. ây-, â- present stem of âmadan "to come;" O.Pers. aitiy "goes;" Av. ay- "to go, to come," aēiti "goes;" Skt. e- "to come near," eti "arrival;" L. ire "to go;" Goth. iddja "went," Lith. eiti "to go;" Rus. idti "to go."

Yon, from Fr., from Gk., as above.

ion rays
  پرتوهای ِ یونی   
partowhâ-ye yoni (#)

Fr.: rayons ioniques   

The thin glowing streamers in a comet's ion tail.

ion; → ray.

ion tail
  دنباله‌ی ِ یونی   
donbâle-ye yoni (#)

Fr.: queue d'ions   

Of a comet, same as → gas tail.

gas; → tail.

ionic
  یونی   
yoni (#)

Fr.: ionique   

Of or pertaining to ions; occurring in the form of ions.

From → ion + → -ic.

ionic abundance
  فراوانی ِ یونی   
farâvâni-ye yoni

Fr.: abondance ionique   

A quantity, pertaining to an ion of a chemical element, expressing the relative number of the ion with respect to that of hydrogen.

ionic; → abundance.

<< < "no abe acc act aff ama ani ant aps ast atm aut bar bif Boh bou cal car Cen chi Cla col com com Com con con con con con con con con con con con con cor cor Cou cur dec def Den det dif dim dis dis dou E-t edi ele ell ene ero exa exp ext fer Fla fra FU Gam geo gra gra had har hig Hub Hyp imp ind inf ins int int ion iro ite Kep lar lep lin lon lun mag mas mer mig mol Moo mut neg new New non non non nuc obs on- opt Ori oxi par per per phl pho Pla ple pol pos pre Pro pro pub qua rad rad rec red reg rem res rev rot Sak Sco sec seg sha sim sol sou sph sta ste Str sub sup T a the Tho tra tre tum uni vel vis wav wor > >>