An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 742
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.

resonant scattering
  پراکنش ِ باز‌آوا   
parâkaneš-e bâzâvâ

Fr.: diffusion résonante   

The absorption and prompt re-emission of photons of a particular wavelength by an atom. In this process, a photon of exactly the right wavelength (i.e. energy) excites an electron in the atom from one energy level to another. The electron then drops back down to its original energy level more or less immediately, emitting a photon of almost identical energy to the one that was absorbed in the first place, but in some random direction. Resonant scattering applies only to line radiation, unlike other forms of scattering which are of continuous radiation (Oxford Dictionary of Astronomy, 2 ed.).

resonant; → scattering.


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."


Fr.: respectable   

Worthy of respect or esteem.

respect; → -able.

  سپاک‌آمیز، سپاکدار   
sepâkâmiz, sepâkdâr

Fr.: respectueux   

Characterized by, or showing deference or respect.

From → respect + -ful, from O.E. -full, ful, → full.

Sepâkâmiz, from sepâk, → respect, + âmiz "mingled with," from âmixtan, → mix.


Fr.: respectif   

Belonging or relating separately to each of two or more people or things that have been mentioned.

From M.E. respective "observing or noting with attention," from M.L. respectivus "having regard for," from L. respect-, → respect, + → -ive.

Sepâkvâr, from sepâk, → respect, + -vâr suffix of nuances and, as a variant of -bâr, meaning "turn (n.), a time."


Fr.: respectivement   

(of two or more items) with each relating to something previously mentioned, in the same order as first mentioned (

respective; → -ly.

pâsoxguyi (#)


The act of responding; response.

respond; → -ence.

Pâsoxguyi, noun from pâsoxgu, → respondet.

pâsoxgu (#)

Fr.: 1) qui répond; 2) défendeur   

1) A person who responds or makes reply.
2) Law: A defendant, especially in appellate and divorce proceedings (

Agent noun related to → respondence.

Pâsoxgu, from pâsox, → responce, + gu "speaker, teller," from goftan "to tell, speak, talk," → -logy.

pâsoxgu (#)

Fr.: répondeur   

The component of a radar system that returns the signals used to detect and locate objects.

Agent noun of respond, → response.

Pâsoxgu, from pâsox, → response, + gu agent noun and present stem of goftan "to say, speak, relate, tell; to compose a poem," from Mid.Pers. guftan "to say, tell, utter;" O.Pers. gaub- "to say."

pâsox (#)

Fr.: réponse   

Any → reaction of a → system to an external → stimulus. See also:
instrumental response function, → peripheral response, → response curve, → response time, → spectral response.

From L. responsum "answer," noun use of neuter p.p. of respondere "answer to, promise in return," from → re- "back" + spondere "to pledge."

Pâsox "answer, response;" Mid.Pers. pâssox "answer, reply;" loaned in Arm. patasxani "answer;" Proto-Iranian *pati-sanh-, from *pati- "agaist, back, opposite to, toward, face to face, in front of," → anti-, + *sanh- "to declare, say;" Mod.Pers. soxan "speech, utterance, word," → speech.

response curve
  خم ِ پاسخ   
xam-e pâsox

Fr.: courbe de réponse   

A curve graphically representing the magnitude of the → response of a → detector to → radiation, usually as a function of → wavelength.

response; → curve.

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