An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 699

Fr.: résolution   

1) The degree to which an → optical system renders visible separate parts of an object. Also known as → angular resolution and → spatial resolution. See also → spectral resolution.
2) The time interval between successive discernible signals. → temporal resolution.

Verbal noun of → resolve.

resolution of a force
  واگشود ِ نیرو   
vâgošud-e niru

Fr.: résolution de force   

Finding the → components of a → force which act in specified → directions.

resolution; → force.


Fr.: résoudre   

To separate and make visible the individual parts of an → image or → spectral feature.

M.E. resolven, from L. resolvere "to loosen, undo, settle," from → re- + solvere "to loosen," → solve.

Vâgošudan, from prefix vâ-, → re-, + gošudan, gošâdan "to loose, open up, let free;" gošâd "opened; ample, broad;" Mid.Pers. wišâdan "to let free;" Khotanese hīyā "bound;" O.Pers. višta "untied, loosened," vištāspa- "with loosened horses" (personal name); Av. višta "untied," ā-hišāiiā "holds fettered," hita- "fastened, tied on, put to;" cf. Skt. sā- "to bind, fasten, fetter," sitá- "bound," ví-sita- "untied."


Fr.: résolu   

Separated and made visible in an → image or → spectral feature. → resolved line.

Past participle of → resolve.

resolved line
  خط ِ واگشوده   
xatt-e vâgošudé

Fr.: raie résolue   

A → spectral line that is not contaminated by other nearby lines.

resolved; → line.

resolving power
  توان ِ واگشود   
tavân-e vâgošud

Fr.: pouvoir de résolution, pouvoir séparateur   

A measure of an optical system's ability to produce an image which separates two points or parallel lines on the object.

Resolving verbal adj. of → resolve; → power.

bâzâvâyi (#)

Fr.: résonance   

1) The state of a mechanical system in which the amplitude of oscillation is increased when it is subjected to stimulus from another source at or near its own natural frequency.
2) The condition of an electrical circuit with respect to a given frequency in which the net reactance is zero and the current flow a maximum.
3) A relationship in which the orbital period of one body is related to that of another by a simple integer fraction, such as 1/2, 2/3, 3/5. → Lindblad resonance.
4) → resonance particle.

Resonance, from M.Fr. resonance, from L. resonantia "echo," from resonare "to resound," from re- "again, back" + sonare "to sound."

Bâzâvâyi, from bâz- "again, back," → re-, + âvâ "voice, sound" (related to âvâz "voice, sound, song," bâng "voice, sound, clamour" (Mid.Pers. vâng), vâžé "word;" Av. vacah- "word," vaocanghê "to decalre" (by means of speech), from vac- "to speak, say;" cf. Skt. vakti "speaks, says," vacas- "word;" Gk. epos "word;" L. vox "voice;" PIE base *wek- "to speak") + -yi noun suffix.

resonance capture
  گیر-اُفت ِ باز‌آوایی   
gir-oft-e bâzâvâyi

Fr.: capture résonante   

Capture by an atomic nucleus of a particle whose energy is equal to one of the energy levels of the nucleus.

resonance; → capture.

resonance frequency
  بسامد ِ باز‌آوایی   
basâmad-e bâzâvâyi

Fr.: fréquence de résonance   

The frequency at which a system is in → resonance.

resonance; → frequency.

resonance line
  خط ِ باز‌آوایی   
xatt-e bâzâvâyi

Fr.: raie de résonance   

For a particular atom, the spectral line corresponding to the longest wavelength arising from a transition between the ground state and an excited state.

resonance; → line.

resonance particle
  ذرّه‌ی ِ باز‌آوایی   
zarre-e bâzâvâyi

Fr.: particule de résonance   

A hadronic particle which exists for only a very brief time (10-23 seconds) before decaying into hadrons; also called resonance. The existence of a resonance cannot be observed directly; it can only be inferred from studying the longer-lived products of its decay.

resonance; → particle.

resonance region neutron
  نوترون ِ ناحیه‌ی ِ باز‌آوایی   
notron-e nâhiye-ye bâzâvâyi

Fr.: neutron dans la région de résonance   

A neutron with an energy between 1 eV and 0.01 MeV.

resonance; → region; → neutron.


Fr.: résonnant   

Pertaining to a system in a state of → resonance; producing resonance; resounding.

Verbal adj. from → resonate.

resonant circuit
  برقراه ِ باز‌آوا   
barqrâh-e bâzâvâ

Fr.: circuit résonnant   

An electrical circuit containing both capacitance and inductance in such a way that a certain periodic electric oscillation will reach maximum amplitude.

resonant; → circuit.

resonant reaction
  واژیرش ِ باز‌آوا   
vâžireš-e bâzâvâ

Fr.: réaction résonnante   

A nuclear reaction whose probability is enhanced at an energy corresponding to an energy level of one of the nuclei. → resonance capture.

Resonant, verbal adj. of → resonate; → reaction.

resonant relaxation
  واهلش ِ باز‌آوا   
vâheleš-e bâzâvâ

Fr.: relaxation résonnante   

A process whereby stellar orbit relaxation can be dramatically enhanced in orbits in a nearly Keplerian star cluster close to a → massive black hole (MBH). This process can modify the angular momentum distribution and affect the interaction rates of the stars with the MBH more efficiently than non-resonant relaxation. In the standard relaxation picture, each encounter is random and uncorrelated, so stars undergo a random walk. Relaxation is driven by the diffusion of energy which then leads to angular momentum transfer. However, in a stellar cluster around a MBH, each star will be on a Keplerian orbit, which is a fixed ellipse in space. The orbits of two nearby stars will thus exert correlated torques on one another, which can lead to a direct resonant evolution of the angular momentum. Since resonant relaxation increases the rate of angular momentum scattering, stars reach highly eccentric orbits more rapidly where they can become → extreme mass ratio inspiral (EMRI)s (Rauch, K.P., Tremaine, S., 1996, arXiv:astro-ph/9603018; Gair J.R. et al. 2013, Living Rev. Relativity, 16, (2013), 7, doi:10.12942/lrr-2013-7).

resonant; → relaxation.


Fr.: résonner   

To produce or exhibit mechanical, electrical, or chemical resonance, or cause a system to produce or exhibit resonance.

Verbal form of → resonance.


Fr.: résorption   

The absorption of a material by a medium or system after having been released from absorption by that same medium or system. → absorption; → desorption; → sorption.

Verbal noun of resorb, from L. resorbere, from → re- + sorbere "to swallow, suck up."

Bâzšam, from bâz "again, back," → re-, + šam, variant of zšâm, as in âšâm, âšâmidan "to drink, to sip;" Av. šam- "to drink, sip, swallow;" Skt. cam, camati "to sip, dirink, lick up, absorb."


Fr.: ressource   

1) A source of supply, support, or aid, especially one that can be readily drawn upon when needed.
2) (often plural) A source of economic wealth, especially of a country (mineral, land, labour, etc.) or business enterprise (capital, equipment, personnel, etc.) (

From Fr. ressourse, from O.Fr. resourdre "to rally, raise again," from L. resurgere "rise again," → re-, + → source.

Bâzxan, from bâz-, → re-, + xan, → source.

  ۱) سپاک؛ ۲) سپاکیدن   
1) sepâk; 2) sepâkidan

Fr.: 1) respect; 2) respecter   

1a) Esteem for or a sense of the worth or excellence of a person, a personal quality or ability, or something considered as a manifestation of a personal quality or ability.
1b) The condition of being esteemed or honored.
1c) A particular, detail, or point (usually preceded by in).
1d) Relation or reference (e.g., with respect to).
2a) To hold in esteem or honor.
2b) To show regard or consideration for (

M.E., from O.Fr., from L. respectus "regard, a looking at," literally "act of looking back (or often) at one," p.p. of respicere "to look back at, regard, consider," from → re- "back" + specere "to look at," cognate with Pers. sepâs "favor, thanksgiving," as below.

Sepâk, variant of sepâs "favor, kindness, thanksgiving;" cf. Sogd. spaxš, sp(a)š, speš, (ə)spaxš "to serve, to respect, to honor;" Mid.Pers. spâs "service, gratitude, thanks;" Av. spas-, spaš-, spôš- "to attend to; to serve;" Skt. spaś- "to observe, watch, spy;" Gk. skeptomai "I look around;" L. specere "to see;" PIE root *spek- "to look around, to notice."

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