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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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<< < Ach sph tid > >>

Number of Results: 46 Search : Ida
tidally locked
  کشندانه قفل   
kešandâné qofl

Fr.:   

The description of a → system of two bodies undergoing → tidal locking.

tidal; → -ly; → lock.

tidally stripped
  کشندانه لُختانیده   
kešandâne loxtânide

Fr.: balayé par effet de marées   

Describing a → stellar system that has undergone → tidal stripping.

tidal; → -ly; → strip.

toroidal magnetic field
  میدان ِ مغناتیسی ِ چنبروار   
meydân-e meqnâtisi-ye cambarvâr

Fr.: champ magnétique toroïdal   

A magnetic field which is generated in a → plasma inside a → toroid, as in a → tokamak, by the electric current which spirals around the toroid. Toroidal field has no radial component. → poloidal magnetic field.

toroid; → magnetic field.

trepidation
  لرزش   
larzeš

Fr.: trépidation   

In medieval astronomy, a spurious oscillatory motion of the equinoxes thought to have a period of 7,000 years. This concept, attributed to Thâbit ibn Qurra (c. 830-901), had a profound influence on medieval astronomy. In order to explain trepidation, Thâbit was said to have added a new sphere to the eight Ptolemaic spheres beyond the sphere of fixed stars.

From L. trepidationem "agitation, trembling," from trepidare "to tremble, hurry," from trepidus "anxious, scared;" cf. Skt. trprá- "hasty;" PIE base *trep- "to shake, tremble."

Larzeš, verbal noun of larzidan "to tremble, shiver;" Mid.Pers. larzidan "to shake, tremble;" Manichean Mid.Pers. rarz- "to shiver with fever;" Proto-Iranian *rarz- "to shake, tremble."

unavoidable
  ناتسنیدنی   
nâtosnidani

Fr.: inévitable   

Impossible to avoid.

avoid; → -ance.

zone of avoidance
  زنار ِ تسنش   
zonâr-e tosneš

Fr.: zone d'évitement, zone vide   

The region on the sky covered by the plane of the → Milky Way. It is characterized by an apparent absence of galaxies, due to the obscuring effect of → interstellar dust in the → Galactic plane.

zone; → avoidance.

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