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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 621
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.

intuitive
  درگسی   
dargasi

Fr.: intuitif   

Known or perceived by → intuition. See also → intuitionism.

intuition; → -ive.

invalid
  ناپای‌مند   
nâpâymand

Fr.: invalide   

Logic: The quality of an argument when its conclusion is false even if all the premises are true.

in-; → valid.

invalidity
  ناپای‌مندی   
nâpâymandi

Fr.: invalidité   

invalid; → -ity.

invariable plane
  هامُن ِ ناورتنده   
hâmon-e nâvartandé

Fr.: plan invariable   

Mechanics: For a rotating rigid body not subject to external torque, a plane which is perpendicular to the angular momentum vector of the body, and which is always tangent to its → inertia ellipsoid.

Invariable negation of → variable; → plane.

invariance
  ناورتایی   
nâvartâyi

Fr.: invariance   

Any property of a physical law or quantity that is unchanged after the application of certain classes of transformations.

Invariance; noun of → invariant.

invariant
  ناورتا   
nâvartâ

Fr.: invariant   

A quantity which is independent of the coordinate system. For example the vector product of two vectors is an invariant since it depends only on the magnitude of the two vectors and the angle between them.

From negation prefix → in- + variant, from L. variantem (nom. varians), pr.p. of variare "to change," from varius "varied, different, spotted."

Nâvartâ, from negation prefix nâ-, → in-, + vartâ adj., from vartidan, variant of gardidan, gaštan "to change; to turn," Mid.Pers. vartitan; Av. varət- "to turn, revolve;" cf. Skt. vrt- "to turn, roll," vartate "it turns round, rolls;" L. vertere "to turn;" O.H.G. werden "to become;" PIE base *wer- "to turn, bend."

invent
  پراویدن   
parâvidan

Fr.: inventer   

To create or design a new type of thing (process, machines, etc.). See also → discover.

From L. inventus, p.p. of invenire "to encounter, come upon, find," from in- "upon" + ven-, from venire "to come" + -tus p.p. suffix.

Parâvidan on the model of dialectals Munji purôv-/purvi-, Yidgha pura-/prvei- "to find, obtain," Shughni, Roshani, Bartangi, Yazghulami firâp-fiript "to arrive at, reach;" prefixed (*fra-/*pra-) from Proto-Iranian *Hap/f- "to reach, attain;" cf. Av. ap- "to reach, attain;" related to Pers. yâb-, yâftan "to find" (Cheung 2007).

invention
  پراوش   
parâveš

Fr.: invention   

The action or of inventing or something invented.

Verbal noun of → invent.

inventor
  پراونده، پراوگر   
parâvandé, parâvgar

Fr.: inventeur   

A person who invents.

invent + → -or.

inverse
  وارون   
vârun (#)

Fr.: inverse   

Opposite to or reversing something.
Math.: Involving two variables that are in a mathematical relationship where, when one increases, the other decreases and vice versa.

From L. inversus, p.p. of invertere, → invert.

Vârun "inverse, upside down," from vâ- "back, backward, again, re-," variant of bâz-, from Mid.Pers. abâz-, apâc-, O.Pers. apa- [pref.] "away, from;" Av. apa- [pref.] "away, from," apaš [adv.] "toward the back;" cf. Skt. ápāñc "situated behind."

inverse axiom
  بنداشت ِ وارون   
bondâšt-e vârun

Fr.: axiome d'inverse   

A basic rule in → group theory stating that for any element a of a group there is an element a-1 such that a * a-1 = a-1 * a = e.

inverse; → axiom.

inverse beta decay
  تباهی ِ وارون ِ بتا   
tabâhi-ye vârun-e β (#)

Fr.: désintégration β inverse   

A collision of a proton with an electron that produces a neutron and an electron neutrino. See → beta decay.

inverse; β, letter of Gk. alphabet; → decay.

inverse bremsstrahlung
  لگام-تابش ِ وارون   
legâm-tâbeš-e vârun

Fr.: Bremsstrahlung inverse   

The absorption of a photon by an electron in a strong electric field. → bremsstrahlung.

inverse; → bremsstrahlung.

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.

inverse P Cygni line profile
  فراپال ِ P Cygniی ِ وارون   
farâpâl-e P Cygni-ye vârun

Fr.: profil P Cygni inverse   

A line profile in which the emission is on the blue side of the absorption. It is usually interpreted as the redshift of the absorption component relative to emission lines, which necessitates infall of matter.

inverse; → P Cygni; → line; → profile.

inverse square law
  قانون ِ توان ِ دوی ِ وارون، قانون ِ چاروش ِ وارون   
qânun-e tavân-e do-ye vârun, qânun-e câruš-e vârun

Fr.: loi en carré inverse   

A force law that applies to the → gravitational and → electromagnetic forces in which the magnitude of the force decreases in proportion to the inverse of the square of the → distance.

inverse; → square; → law.

inverse Zeeman effect
  اُسکر ِ زیمن ِ وارون   
oskar-e Zeeman-e vârun

Fr.: effet Zeeman inverse   

The → Zeeman effect obtained in absorption. The phenomenon is observed by sending white light through an absorbing vapor when the latter is subjected to a uniform magnetic field. The laws governing the inverse effect are similar to those for the direct effect.

inverse; → Zeeman 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.

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