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: 13 Search : rete
accrete
  فربالیدن   
farbâlidan

Fr.: accréter   

To grow or increase gradually, by the process of → accretion.

Back-formation from → accretion.

accreted gas
  گاز ِ فربالیده   
gâz-e farbâlidé

Fr.: gaz accrété   

The gas involved in various accretion processes, such as that fed into an → accretion disk, pulled by a compact object, or used in the mass growth of a galaxy.

accretion; → gas.

concrete
  ۱) امبس، بسودنی؛ امبس؛ ۲) امبسیدن   
1a,b) ambas, basudani; 1c) ambas; 2) ambasidan

Fr.: 1) concret; 2) se concrétiser   

1a) Relating to a particular instance or object, as opposed to → general.
1b) Relating to or characteristic of things capable of being perceived by the senses, as opposed to → abstractions.
1c) Formed by the coalescence of particles; condensed; solid.
2a) To form into a mass by coalescence of particles; render solid. → concretion.
2b) To make real, tangible, or particular.

M.E. concret, from L. concretus "condensed, hardened, thick, stiff, clotted," p.p. of concrescere "to grow together," from → com- "together" + crescere "to grow," cognate with Pers. korré "foal, colt," korr "son, boy," → crescent.

Ambas, a variant of anbast in several dialects (e.g. Tabari) "dense, thick;" Mid.Pers. hambast "compact, tied tgethmrl" from ham- "together," → com- + bast p.p. of bastan "to clot, congeal; to bind," Av./O.Pers. band- "to bind, fetter," basta- "bound, tied," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind.
Basudani "tangible," from basudan "to touch," variant pasâvidan, ultimately from Proto-Ir. *pra-sau-, from *sau- "to rub; whet; wear;" cf. sudan, sâyidan "to rub," sân "whetstone," variants fasân, afsân, awsân; Mid.Pers. sūdan "to rub;" Khotanese sauy- "to rub;" Sogd. ps'w "to rub;" Choresmian bs'w "to rub off, polish;" Skt. sā- "to sharpen, whet."

discrete
  گسسته، جدا   
gosasté, jodâ (#)

Fr.: discret   

Apart or detached from others; separate; distinct. Composed of distinct or discontinuous elements.

From O.Fr. discret, from L. discretus "separated, distinct," from p.p. of discernere "to distinguish," from → dis- "off, away" + cernere "distinguish, separate, sift," → crisis.

Gosasté "broken, broken off," p.p. of gosastan "to break, split," Mid.Pers. wisistan "to break, split," Av. saed- "to split," asista- "unsplit, unharmed," Skt. chid- "to split, break, cut off," Gk. skhizein "to split," L. scindere "to split;" PIE stem *skei- "to split, cut."
Jodâ "separate, distinct," Mid.Pers. jutâk (yutâk), jut (yut).

discrete absorption component (DAC)
  همنه‌ی ِ درشمی ِ گسسته   
hamne-ye daršami-ye gosasté

Fr.: composante d'absorption discrète   

The rapid, systematic changes in the absorption parts of the → P Cygni profiles of the ultraviolet → resonance lines (Si IV, C IV, and N V) observed in a majority of massive → hot stars. DACs are typically seen to accelerate to the → blue wing of the profile over a few days, becoming narrower as they approach the → terminal velocity.

discrete; → absorption; → component.

discrete data
  داده‌های ِ گسسته   
dâdehâ-ye gosasté (#)

Fr.: données discrètes   

Data that can only take a small set of particular values, usually whole numbers. For instance, number of children in a family cannot be 2.4, since parents cannot actually have 2.4 children. → continuous data.

discrete; → data.

discrete radio source
  خن ِ رادیویی ِ جدا   
xan-e râdioyi-ye jodâ

Fr.: radiosource discrète   

A localized source on the celestial sphere that can be observationally separated at radio wavelengths from its background emission.

discrete; → radio; → source.

discrete spectrum
  بیناب ِ گسسته   
binâb-e gosasté

Fr.: spectre discret   

A spectrum in which the component wavelengths (and wave numbers and frequencies) constitute a discrete sequence of values (finite or infinite in number) rather than a continuum of values.

discrete; → spectrum.

discrete transition
  گذرش ِ گسسته   
gozareš-e gosasté

Fr.: transition discrète   

A transition between two quantum-mechanical energy levels. See also → discrete spectrum.

discrete; → transition.

discrete value
  ارزش ِ گسسته   
arzeš-e gosasté

Fr.: valeur discrète   

A quantity that has certain magnitudes and does not represent a → continuous variable.

discrete; → value.

discrete variable
  ورتنده‌ی ِ گسسته   
vartande-ye gosasté

Fr.: variable discret   

A variable which has only → discrete values and has no in-between values.

discrete; → variable.

discrete-time quantum walk
  پویش ِ کو‌آنتومی با زمان ِ گسسته   
puyeš-e kuântomi bâ zamân-e gosasté

Fr.: marche quantique à temps discret   

A → quantum walk involving a probabilistic → operator that changes the direction while leaving the position fixed, and a shift operator that changes the position. Discrete-time quantum walk was introduced by J. Watrous (2001, Journal of Computer and System Sciences 62, 376)

discrete; → time; → quantum; → walk.

rete
  تنندو، عنکبوت   
tanandu, ankabut

Fr.: araignée   

The component of a → planispheric astrolabe that is held against the → tympanum by the → horse, but can rotate freely in the → mater around the → pin to simulate the daily movement of the stars in the sky. It is the most characteristic part of the planispheric astrolabe.

From L. rete "net."

Tanandu "spider," from tanidan "to spin," → tension; ankabut "spider," loan from Arab.