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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < -sc Sag sam sat sca sca Sch sco sec sec sec sei sel sem sep set Sha she sho sid sig sim sin sip ske sli smo soc sol sol sol sol son sou spa spa spe spe spe sph spi spo Squ sta sta sta sta Ste ste sti sto str Str sub sub sub sum sup sup sup sup sur sus sym syn syz > >>

Number of Results: 1301
sounding balloon
  بالون ِ گمانه‌زنی   
bâlon-e gamâne-zani

Fr.: ballon-sonde   

A small, free balloon sent into the upper atmosphere to measure, record, and transmit meteorological reports to a ground station.

sounding; → balloon.

soundness
  دروایی   
dorvâyi

Fr.: santé   

1) The quality of being → sound.
2) Logic: The quality or condition of a → deductive reasoning if it meets the two conditions of → valid arguments and → truepremises. These are the → necessary and sufficient conditions for soundness.

sound; → -ness.

source
  خن   
xan

Fr.: source   

General: Any thing or place from which something comes, arises, or is obtained.
Physics: A point, line, or area in space from which the lines of force in a vector field originate.
Electricity: Any active component, battery, or generator that supplies energy.
Thermodynamics: Any body, device, or system that provides energy.

M.E., from O.Fr. sourse "a rising, beginning, fountainhead of a river or stream," from p.p. of sourdre "to rise, spring up," from L. surgere "to rise," → surge.

Xan "source," variant xân (Gilaki xoni, Tabari xoni,Laki kyani, Tâleši xâni, xoni,); Mid.Pers. xân, xânig "source, spring," Av. xâ-, xan- "source, fountain, spring," xayana- "belonging to a spring;" cf. Khotanese khâhâ- "spring, fountain;" Skt. khâ'- "spring, source."

source function
  کریای ِ خن   
karyâ-ye xan

Fr.: fonction source   

For a radiating material, the ratio of emissivity to opacity.

source; → function.

south
  دشتر   
daštar

Fr.: Sud   

The cardinal point which is opposite to north. It is also the direction of the Sun at local noon (in the northern hemisphere).

M.E. suth(e), south(e), from O.E. suth "southward, in the south;" cf. O.S., O.Fris. suth "southward, in the south," M.Du. suut), O.H.G. sund, perhaps related to base of *sunnon "sun," with sense of "the region of the sun."

Note: South is related to right since it is to the right when one faces the rising Sun. This occurs in, for example, in Av., Skt., and O.Ir., as below.

Daštar, from Mid.Pers. dašn "right hand;" Av. dašina- "right; south;" Ossetic dæsni "skillful, dexterous;" cf. Skt. dáksina- "right; southern;" Gk. dexios (<*deks-i-uo-) "right," dexiteros "located on the right side;" L. dexter "right;" Goth. taihswo "right hand;" O.Ir. dess "on the right hand, southern;" PIE base *deks- "right." The second element -tar direction suffix, as in Mid.Pers. ošastar "east" (Av. ušastara- "eastern"), dôšastar "west" (Av. daôšatara-, daôšastara- "western"), abâxtar "north" (Av. apāxtara- "northern"), Mod.Pers. bâxtar, → west.

South Atlantic Anomaly (SAA)
  ناسانی ِ اتلسی ِ دشتر   
nâsâni-ye Atlas-e daštar

Fr.: Anomalie Atlantique Sud   

A region of the Earth where the inner → Van Allen belt comes closest to the Earth's surface. It is due to the fact that the → geomagnetic field is offset from the center of the Earth. The region is centered near 25 degrees South 50 degrees West, close to the Atlantic coast of Brazil. The excess of trapped energetic particles in that region presents a problem for satellites in orbit around the Earth.

south; → Atlantic; → anomaly.

south celestial pole
  قطب ِ آسمانی ِ دشتر   
qotb-e âsmâni-ye daštar

Fr.: pôle sud céleste   

The point in the → southern hemisphere where the → rotation axis of the Earth touches the → celestial sphere. In contrast to the → north celestial pole, no bright star is visible in that direction.

north; → celestial; → pole.

south pole
  قطب ِ دشتر   
qotb-e daštar

Fr.: pôle Sud   

1) An → imaginary point in the → southern hemisphere representing the intersection of the → Earth's → rotation axis with the → globe with the → celestial sphere.
2) For a → magnet, the pole which points toward the geographic south.
3) In a → magnetic field, the point which receives a → line of force coming from the → north pole.

south; → pole.

southern
  دشتری   
daštari

Fr.: du Sud, méridional   

Of or pertaining to the south.

M.E., O.E. suðerne, from suð, → south, + -erne, suffix denoting direction.

Daštari, relating to daštar, → south.

Southern Cross
  چلیپای ِ دشتری   
calipâ-ye daštari

Fr.: Croix du Sud   

Popular name for the constellation → Crux. Its four brightest stars form a distinctive cross shape.

southern; → Crux.

southern hemisphere
  نیم‌سپهر دشتری   
nimsepehr-e daštari

Fr.: hémisphère sud   

The half of the → Earth or another → north pole between the → south pole and the → equator.

southern; → hemisphere.

southing
  گذر ِ دشتر-سو   
gozar-e daštar-su

Fr.:   

The transit of a celestial object, especially the Sun, across the meridian due south of the observer.

Verbal noun from → south (v.).

Gozar-e daštar-su, literally "passage southward," from gozar, → passage; daštarsouth; su, → direction.

space
  فضا   
fazâ (#)

Fr.: espace   

1) Physics: That part of the boundless four dimensional continuum in which matter can be physically extended.
2) Astro.: That part of the Universe which lies beyond the Earth's atmosphere and in which the density of matter is low. Also known as outer space.

M.E., from O.Fr. espace, from L. spatium "room, area, distance, stretch of time," of unknown origin.

Fazâ, loan from Ar.

space charge
  بار ِ فضایی   
bâr-e fazâyi (#)

Fr.: charge d'espace   

Electricity: An electric charge belonging to a cloud of electrons lying between a cathode and plate within an electric tube.
Geophysics: An excess of either negatively or positively charged ions in a layer of the atmosphere, giving that layer either a negative or positive charge.

space; → charge.

space debris
  تیفال ِ فضایی   
tifâl-e fazâyi

Fr.: débris spatial   

Man-made objects in orbit around the Earth that no longer serve any useful purpose. The estimated number of debris include about 22,000 tractable objects larger than 10 cm in all orbits, of which 2,200 are dead satellites and last stages of the rocket that put them in orbit. There are also left-overs from spacecraft and mission operations, such as bolts, lens caps, clamp bands, auxiliary motors, etc. The debris presents a threat because of their high speeds, which ranges between 15 and 20 km/sec. Also called space junk, space waste, orbital debris.

space; → debris.

space flight
  پرواز ِ فضایی   
parvâz-e fazâyi

Fr.: vol spatial   

A travel outside the Earth by manned or unmanned vehicle requiring space technology.

space; → flight.

space group
  گروه ِ فضایی   
goruh-e fazâyi

Fr.: groupe d'espace   

Set of operations (rotation about an axis, reflection across a plane, translation, or combination of these) which when carried out on a periodic arrangement of points in space brings the system of points to self-coincidence.

The word group comes from the mathematical notion of a group.

space mission
  گسیلان ِ فضایی   
gosilân-e fazâyi

Fr.: mission spatiale   

A manned or unmanned space flight outside the Earth's atmosphere.

space; mission, from L. missionem (nominative missio) "act of sending," from mittere "to send," of unknown origin.

Gosilân, from gosil, variant gosi "sending away, dismission;" Mid.Pers. wisé "to despatch" (Parthian Mid.Pers. wsys- "to despatch;" Buddhist Mid.Pers. wsydy "to despatch;" Sogdian 'ns'yd- "to exhort"), from Proto-Iranian *vi-sid- "to despatch, send off," from prefix vi- "apart, away, out," + *sid- "to call" + -ân nuance suffix; fazâyi adj. of fazâ, → space.

space motion
  جنبش ِ فضایی   
jonbeš-e fazâyi

Fr.: mouvement spatial   

The velocity and direction of motion of a star or celestial object with respect to the Local Standard of Rest. Same as → peculiar velocity.

space; → motion.

space probe
  گمانه‌ی ِ فضایی   
gomâne-ye fazâyi

Fr.: sonde spatiale   

A spacecraft carrying instruments intended for use in exploration of the physical properties of outer space or celestial bodies other than Earth.

space; → probe.

<< < -sc Sag sam sat sca sca Sch sco sec sec sec sei sel sem sep set Sha she sho sid sig sim sin sip ske sli smo soc sol sol sol sol son sou spa spa spe spe spe sph spi spo Squ sta sta sta sta Ste ste sti sto str Str sub sub sub sum sup sup sup sup sur sus sym syn syz > >>