An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 1347
stop consonant
  هم‌آوای ِ ایستی   
hamâvâ-ye isti

Fr.: consonne occulsive   

occlusive consonant.

stop; → consonant.

stop number
  وابر ِ کانونی   
vâbar-e kânuni

Fr.: rapport focal   

Same as → focal ratio.

stop; → ratio.

Vâbar, → ratio; kânuni, → focal.

stopping power
  توان ِ بازداشت   
tavân-e bâzdâšt

Fr.: pouvoir d'arrêt   

A quantity indicating the extent with which a substance absorbs a → charged particle passing through it. It is the energy lost by a → non-relativistic particle per unit length of its path in the substance.

stop; → power.

  رهاواژ، فکن‌واژ   
rahâ-vâž, fekan-vâž

Fr.: mot vide   

Computers: A very commonly used word that is normally excluded by computer search engines. Stopwords have very little informational content, such as: and, the, of, it, as, may, that, a, an, of, off, etc.

stop; → word.

Rahâ-vâž, literally "free word," from rahâ "free, set free" (O.Pers. rad- "to leave," Skt. rah-, rahati "separates, leaves," Av. razah- "isolation;" PIE *redh-) + vâž, vâžé, → word. Fekan-vâž, literally "dropped word," from fekan present stem of fekandan, afkandan "to throw, cast away;" Mid.Pers. abgandan "to throw;" O.Pers. avakan- "to throw, place on," from Proto-Iranian *kan- "to throw, place, put."

tufân (#)

Fr.: orage   

An atmospheric disturbance with strong winds accompanied by rain, snow, or other precipitation and often by thunder and lightning.
A violent disturbance or upheaval.

M.E, from O.E. storm; cf. O.S., M.L.G., M.Du., Du. storm, O.H.G., Ger. sturm.

Tufân "storm; the roaring of the sea; noise, confused hum of men or animals," Lori tufo, Laki tuf "intense shower accompanied by wind," from tufidan "to roar, raise a tumult."

dâstân (#)

Fr.: conte, histoire   

A narrative, either true or fictitious, in prose or verse, designed to interest, amuse, or instruct the hearer or reader; tale (

M.E. storie, from O.Fr. estorie, estoire "story, chronicle, history," from L.L. storia, shortened from L. historia "history, account, tale, story," → history.

Dâstân "story, fable, romance."


Fr.: traînard   

One who moves along slowly so as to remain some distance behind the person or people in front. → blue straggler.

From straggle "to wander from the proper path, to rove from one's companions," from M.E. straglen "to wander."

Veylân "wanderer, vagabond," of unknown origin, may be related to yalé "turned loose, vagabond, allowed to pasture at liberty, rover," or vel "set free."

râst (#)

Fr.: droit   

Free from a bend, angle, or curve. → straight line.

M.E. streght, straight, from p.p. of strecchen, → stretch.


straight line
  خط ِ راست   
xatt-e râst (#)

Fr.: droite   

A line without curvature or angles. A line whose → slope is → constant.

straight; → line.


Fr.: déformation   

Change of volume and/or shape of a body, or part of a body, due to an applied → stress. When a body is deformed by such a force, through compression or distension, the strain is the ratio of the dimensional change to the original or un-strained dimension. The strain may be a ratio of lengths, areas, or volumes. See also → shear.

M.E. streinen (v.), from O.Fr. estreindre "to bind tightly, clasp, squeeze," from L. stringere "to bind or draw tight," from PIE base *strenk- "tight, narrow; pull tight, twist;" cf. Gk. strangein "twist;" Lith. stregti "congeal;" O.H.G. strician "mends nets;" Ger. stramm, Du. stram "stiff."

Šepil "squeeze; fondness" (Dehxodâ) of unknown origin.

šegeft (#)

Fr.: étrange   

Unusual, not expected, extraordinary. → strange particle.

M.E., from O.Fr. estrange "foreign, alien," from L. extraneus "foreign, external," from extra "outside of," → extra-.

Šegeft, from Mid.Pers. škaft, škift, škuft "strange, wonderful, amazing;" Av. skapta- "wonderful."

strange particle
  ذره‌ی ِ شگفت   
zarre-e šegeft

Fr.: particule étrange   

An elementary particle created in high-energy particle collisions having a short life and a strangeness quantum number of 1. For example, sigma and xi baryons are strange particles. A strange particle is produced when a strange quark is created in a high-energy collision. → strangeness.

strange; the concept of "strange" arose from the observation that these particles decay rapidly, in contrast to others that do not. → particle.

šegefti (#)

Fr.: étrangeté   

A quantum number used to describe certain short-lived particles. It is defined as the number of strange anti-quarks minus the number of strange quarks in a particle. Strangeness is conserved in any strong and electromagnetic interaction, but not in weak interactions.

Strangeness, the quality or condition of being → strange.

Strasbourg Astronomical Data Center (CDS)

Fr.: Centre de Données astronomiques de Strasbourg (CDS)   

A data center dedicated to the collection and worldwide distribution of astronomical data and related information. It is located at the Strasbourg Astronomical Observatory, France. The CDS has several goals, mainly: collecting all of the useful information regarding astronomical objects in computerized form, including observational data produced by observatories on the ground or in space; upgrading these data by critical evaluations and comparisons; and distributing the results to the astronomical community. Currently the CDS services include: → SIMBAD, Aladin interactive sky atlas, and VizieR catalogues.

CDS, short for Centre de Données astronomiques de Strasbourg.


Fr.: stratification   

A layered structure of sedimentary rocks in which the individual layers can be traced a considerable distance. The layers can be caused by many differences which include materials of different composition, color, grain size or orientation.

Strati-, from → stratum + -fication from L. -ficare "to do, make."

Ciné, → stratum + bandi, from bastan "to bind, shut; to contract, get, acquire; to coagulate," (Mid.Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind, → band).

  چینه‌شناسیک، چینه‌نگاریک   
cine-šenâsik, cine-negârik

Fr.: stratigraphique   

Of, relating to, or determined by → stratigraphy.

stratum; → -graphic.

  چینه‌شناسی، چینه‌نگاری   
cine-šenâsi (#), cine-negâri

Fr.: stratigraphie   

The study of → sedimentary rock units, including their geographic extent, age, classification, characteristics and formation.

stratum; → -graphy; → -logy.


Fr.: stratosphère   

The second major layer of Earth's atmosphere, just above the → troposphere and below the → mesosphere, extending from about 20 km to 90 km above the Earth. It is characterized by little vertical increase in temperature.

From Fr. stratosphère, literally "sphere of layers," coined by Fr. meteorologist Léon-Philippe Teisserenc de Bort (1855-1913) from L. stratus "a spreading out" (from p.p. stem of sternere "to spread out") + -sphère (→ sphere), as in atmosphère.

Cine-sepehr, from Ciné, → stratum, + sepehr, → sphere.


Fr.: stratosphérique   

Of, relating to, or characteristic of the stratosphere.

stratosphere; → -ic.

Stratospheric Observatory for Infrared Astronomy (SOFIA)
  نپاهشگاه ِ چینه‌سپهری برای اخترشناسی ِ فروسرخ   
Nepâhešgâh-e Cine-sepehri barây axtaršenâsi-ye forusorx

Fr.: Observatoire stratosphérique pour l'astronomie infrarouge   

A partnership of NASA and the German Aerospace Center, consisting of an extensively modified Boeing 747SP aircraft carrying a reflecting telescope with an effective diameter of 2.5 m. NASA Ames Research Center manages SOFIA's science and mission operations in cooperation with the Universities Space Research Association and the German SOFIA Institute. SOFIA is the largest airborne observatory in the world, with a planned 20-year lifetime.

stratospheric; → observatory; → infrared; → astronomy.

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