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

<< < -es -iv -ti 21- a p abe abs abs acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arb are ari art ass ast ast ast Atl ato ato Aug aut awa azi bac bal Bar Bar Bay bea Bep Bet BIC bij bin bio bir bla bla blu blu bol Boo bou Bq bre bri bub B[e cal cal can car car Cas cat cau cel cen Cer cha cha cha che chi CI cir cir cla cle clo clu co- cob coh col col col com com com com com com com com Com con con con con con con con con con con con con coo cor cor cor cos cos cos cou cov cra cri cro cry cum cur cyc d'A dar dat DC dea dec dec dec def def deh Del den dep des det deu dia dif dif dif dim dip Dir dis dis dis dis dis div dom dos dou dri Dum dus dyn dyn ear eas ecl Edd eff Ein eje ele ele ele ele eli emb emi Enc ene ens eph epo equ equ eru eth Eul eve evo exc exc exi exo exp exp ext ext Fab fai Fan fea fem fer fie fil fir fir fla flo flu foc For for fos fra fre fre fro fun g m Gal gal gal gas gau gel gen geo geo geo gho gla gno gra gra gra gra Gre Gre gro gyr had hal har Har HD hea hel hel Her Her Hic hig hip hol hor hos hov Hub hun hyd hyd Hyd hyp IC ide ill ima imp imp inc inc ind ind inf inf inf inf inj ins ins int int int int int int int int inv inv ion iro Isl iso iso Jac jet jud jur kel Kep kil Kle Kui Lag lam Lap Lar lat law lea len lep Lib lig lim lin lin Lio lit loc LOF lon Lor low lum lun Lup Lyo mac mag mag mag mag mag mai man Mar mas mas mat Max mea mec Mei Mer Mer met met Met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxi pai pan par par par par pas pea pen per per per per Per pet pha Pho pho pho pho Pic Pis Pla pla pla pla Ple poa pol pol pol pol pop pos pos pow pra pre pre pre pri pri pri pro pro pro pro pro pro pro Pto pul puz qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea Rea rec rec red red ref ref reg rel rel rel rep res res res res ret Rhe rid rig ris Roe Ros rot rub rut Sag sam sat sca sca Sch sci sea sec sec see sel sem sen ser Sgr sha shi sho sid sig sim sin Sir ske sli smo soc sol sol sol sol sol sou sou spa spe spe spe spe sph spi spl spu sta sta sta sta sta ste ste sti sto str Str sub sub sub sul sup sup sup sup sur sus sym syn sys Tam Tay tel ten Ter Tha the the the thi thr tib tid tim tok Tor tot tra tra tra tra Tri tri tro tru tur twi Typ ufo ult unc uni uni uni upl ura uti val var vec vel ver ver vil vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yea You zer zod > >>

Number of Results: 13009 Search : far
Agena (β Centauri)
  حضار   
Hazâr

Fr.: Agena   

Alternative name for the star Hadar, the second brightest star in Centaurus and the tenth brightest star in the sky. → Hadar.

The etymology of Agena is not clear. Some sources have suggested L. a genu "by the knee," but it seems dubious.

agent
  کنشگر   
konešgar (#)

Fr.: agent   

1) Something such as a chemical substance, organism, or natural force that causes an effect.
2) Somebody who provides a particular service for another.

From L. agentem (nominative agens, genitive agentis), pr.p. of agere "to set in motion, drive, lead, conduct," → act.

Konešgar, from koneš verbal noun of kardan "to do, to make" (Mid.Pers. kardan, O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "makes," cf. Skt. kr- "to do, to make," krnoti "makes," karma "act, deed;" PIE base kwer- "to do, to make") + -gar, → -or.

ageostrophic wind
  باد ِ نازمین‌چرخشی   
bâd-e nâ-zamincarxeši

Fr.: vent agéostrophique   

Meteo.: The wind component deviating from the → geostrophic wind in the absence of the → geostrophic balance. In other words, ageostrophic wind is the difference between the true wind and the geostrophic wind.

From negation prefix → a- + → geostrophic; → wind.

agglomerate
  ۱) برگلمیدن؛ ۲) برگلمیده؛ ۳) برگلم   
1) bargolemidan; 2) bargolemidé; 3) bargolem

Fr.: 1) agglomérer; 2,3) aggloméré   

1) (v.) To collect or gather into a cluster or mass.
2) (adj.) Gathered together into a cluster or mass.
3a) (n.) A mass of things clustered together.
3b) A rock composed of rounded or angular volcanic fragments (Dictionary.com).

From L. agglomeratus, p.p. of agglomerare "to wind or add onto a ball," from → ad- "to" + glomerare to "wind up in a ball," from glomus (genitive glomeris) "ball of yarn," globus "globe;" PIE *gel- "to make into a ball."

Bargolemidan, from suffix bar- "to, on, upon," + golem, from Lori, Laki golemâ, golama "curd, obtained from milk by coagulation, used to make cheese," Lori golem "stagnating water," Sangesari, Semnâni, Sorxe-yi, Lâsgardi golma, "boll, i.e. the rounded seed capsule of plants such as cotton," + -idan infinitive suffix.

agglomeration
  برگلمش   
bargolemeš

Fr.: agglomération   

1) A jumbled cluster or mass of varied parts.
2) The act or process of agglomerating (Dictionary.com).

Verbal noun of → agglomerate.

Agilkia
  اگیلکیا   
Agilkia

Fr.: Agilkia   

The site where → Rosetta's Philae lander is scheduled to touch down on Comet 67P/→ Churyumov-Gerasimenko on 12 November 2014.

Named for Agilkia Island (اجیلکیا), an island on the Nile River in the south of Egypt. A complex of Ancient Egyptian buildings, including the famous Temple of Isis, was moved to Agilkia from the island of Philae when the latter was flooded during the building of the Aswan dams last century.

agitate
  ژیلیدن   
žilidan

Fr.: 1) agiter, remuer; 2) émouvoir, troubler; 3) faire de l'agitation, exciter l'opinion publique   

1) To move or force into violent, irregular action. To shake or move briskly.
2) To disturb or excite emotionally; arouse; perturb.
3) To arouse or attempt to arouse public interest and support, as in some political or social cause or theory (Dictionary.com).

From L. agitatus, p.p. of agitare "move to and fro," frequentative of agere "to drive," → act.

Žilidan, from Lori, Laki žil "shaking, moving," related to žir, → act.

agitation
  ژیلش   
žileš

Fr.: agitation   

The act or process of agitating; state of being agitated. → thermal agitation.

Verbal noun of → agitate.

agitator
  ژیلشگر   
žilešgar

Fr.: agitateur   

1) A person who stirs up others in order to upset the status quo and further a political, social, or other cause.
2) A machine or device for agitating and mixing (Dictionary.com).

agitate; → -or; → turbulence.

agree
  ساچندن   
sâcandan

Fr.: consentir, convenir, être d'accord   

1) To have the same views, emotions, etc.; harmonize in opinion or feeling (often followed by with).
2) To give consent; assent (often followed by to).
3) To come to one opinion or mind; come to an arrangement or understanding; arrive at a settlement.
4) To be consistent; harmonize (usually followed by with).
5) To correspond; conform; resemble (Dictionary.com).

M.E. agre, agreen, from O.Fr. agreer "to receive with favor, take pleasure in," from phrase a gré "favorably, of good will," from L. → ad- "to" + gratum "pleasing," neuter of gratus "pleasing, agreeable," from PIE root *gwer- "to praise;" cf. Pers. gerâmi "dear, revered," from Av. gar- "to praise;" Skt. grnati "sings, praises," Lith. giriu "to praise, celebrate."

Infinitive from sâcan, → agreement.

agreement
  ساچن   
sâcan

Fr.: accord   

1) The act of agreeing or of coming to a mutual arrangement.
2) The state of being in accord (Dictionary.com).

Verbal noun from → agree + → -ment.

Sâcan, from sâz-, saz, sac-, sâj-, Pers. sâz-, sâxtan "to build, prepare; to agree, be compatible; to adapt, adjust;" sazidan "to suit, fit, be worthy," sazâ "suitable, agreeing with, congruous, deserving of;" Baluchi sâc-/sâcit "to adjust, be suitable, agree;" Mid.Pers. sacitan/sazidan "to fit," sazešn "fitness," sazâg "fitting, worth;" Av. sak- "to understand, to mark," sâcaya- (causative) "to teach;" Proto-Ir. *sac- "to fit, be suitable; to prepare;" + suffix -an, → minus.

agriculture
  کشاورزی   
kešâvarzi (#)

Fr.: agriculture   

The occupation or science of cultivating the land, producing crops, and feeding, breeding, and raising livestock; farming.

M.E., from M.Fr., from L. agricultura, compound of agri cultura "cultivation of land," from agri, genitive of ager "a field" + cultura "cultivation," → culture.

Kešâvarzi "agriculture," from kešâvarz "farmer, cultivator," from kešt-varz. The first component kešt, variant kâšt, from kâštan, keštan, variants of kâridan "to cultivate, to plant;" Mid.Pers. kištan, kâridan "to sow, plant; to make furrows;" Av. kar- "to strew seed, cultivate," kāraiieiti "cultivates;" cf. Skt. kar- "to scatter, strew, pour out." The second component varz agent noun of varzidan "to labor, exercise, practise;" cf. Gk. ergon "work;" Arm. gorc "work;" Lith. verziu "tie, fasten, squeeze," vargas "need, distress;" Goth. waurkjan; O.E. wyrcan "work," wrecan "to drive, hunt, pursue;" PIE base *werg- "to do, to work."

air
  هوا   
havâ (#)

Fr.: air   

The mixture of gases of which the earth's atmosphere is composed. It is chiefly made up of Nitrogen (about 78%) and Oxygen (about 20%).

Air, from O.Fr. air, L. aer, Gk. aer, related to Gk. aura "breath, vapor;" PIE *wer- "to raise, lift."

Havâ, from Ar., probably a loanword from Mid.Pers. vây "weather," Av. vayah-, vaya- "weather, atmosphere," from va- "to blow." Cf. Skt. va-, Gk. aemi- "to blow;" Av. vâta- "wind," Skt. vata-, L. ventus, Mod. Pers. bâd "wind." PIE *we- "to blow".

air shower
  تندبار ِ پرتوها‌ی ِ کیهانی، رگبار ِ ~ ~   
tondbâr-e partowhâ-ye keyhâni, ragbâ;r-e ~ ~

Fr.: gerbe (de rayons cosmiques)   

Same as → cosmic-ray shower.

air; → shower.

aircraft
  هواناو   
havânâv

Fr.: avion   

A machine capable of flying by means of → buoyancy or → aerodynamic forces, such as an airplane, helicopter, glider, or balloon.

air; → craft.

airglow
  هوافروز، شب‌فروغ   
havâforuz, šabforuq

Fr.: luminescence nocturne   

The faint ever-present glow in the → night time → sky caused by the → collision of → atoms and → molecules in Earth's → upper atmosphere with high energy → particles and → radiation, mainly from the → Sun. The airglow, also called nightglow, varies with time of night, → latitude, and → season.

air; → glow; → night.

airmass
  هواتود، توده‌ی ِ هوا   
havâtud, tude-ye havâ (#)

Fr.: masse d'air   

A measure of the path length traversed by starlight through Earth's atmosphere before it reaches the detector; it is taken relative to the length at the zenith.

air; → mass.

Airy disk
  گرده‌ی ِ ایری   
gerde-ye Eyri

Fr.: tache de diffraction, ~ d'Airy   

The bright disk-like image of a point source of light, such as a star, as seen in an optical system with a circular → aperture.

Named after Sir George Biddell Airy (1801-1892), Astronomer Royal, great administrator, who much improved the equipment at Greenwich Observatory. → disk.

Gerdé, → disk; Airy, see above.

Airy transit circle
  پرهون ِ نیمروزانی ِ ایری   
parhun-e nimruzâni-ye Airy

Fr.: circle méridien d'Airy   

A → transit circle that defines the position of the → Greenwich Meridian since the first observation was taken with it in 1851. Airy's transit circle lies at longitude 0°, by definition, and latitude 51° 28' 38'' N.

Named after Sir George Biddell Airy (1801-1892), Astronomer Royal, at the Royal Observatory in Greenwich from 1835 to 1881. Airy transformed the observatory, installing some of the most advanced astronomical apparatus of his day and expanded both staff numbers and their workload; → transit; → circle.

albedo
  سپیدا   
sepidâ (#)

Fr.: albedo   

The fraction of the total light or other radiation which falls on a non-luminous body, such as a → planet, → satellite, or → asteroid, and which is reflected by it. Generally, the albedo is equal to the ratio between the light quantity reflected and the light quantity received. The albedo values range between 0.0 (0%), for a perfectly black area, which absorbs all incident light, and 1.0 (100%) for a perfect reflector. The planets or planetary satellites with dense atmospheres have greater albedos than those of transparent atmospheres or of no atmospheres. The albedo can vary from one surface point to another, so that a mean albedo is given for practical purposes. The natural surfaces reflect different light quantities in different directions and the albedo can be expressed in several ways, depending on the way in which the measurement was made: in one direction or, on the average, in all directions (M.S.: SDE). See also → Bond albedo, → geometric albedo.

Albedo, L. "whiteness," from albus "white," from PIE base *albho- "white". Compare with Gk. alphos "white leprosy," O.H.G. albig, O.E. elfet "swan, the white bird". The idea of whiteness derives from the fact that whiter bodies have a higher reflective power, while opaque objects are more absorptive.

Sepidâ, from sepid, →, white, + noun-forming prefix from certain adjectives.

<< < -es -iv -ti 21- a p abe abs abs acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arb are ari art ass ast ast ast Atl ato ato Aug aut awa azi bac bal Bar Bar Bay bea Bep Bet BIC bij bin bio bir bla bla blu blu bol Boo bou Bq bre bri bub B[e cal cal can car car Cas cat cau cel cen Cer cha cha cha che chi CI cir cir cla cle clo clu co- cob coh col col col com com com com com com com com Com con con con con con con con con con con con con coo cor cor cor cos cos cos cou cov cra cri cro cry cum cur cyc d'A dar dat DC dea dec dec dec def def deh Del den dep des det deu dia dif dif dif dim dip Dir dis dis dis dis dis div dom dos dou dri Dum dus dyn dyn ear eas ecl Edd eff Ein eje ele ele ele ele eli emb emi Enc ene ens eph epo equ equ eru eth Eul eve evo exc exc exi exo exp exp ext ext Fab fai Fan fea fem fer fie fil fir fir fla flo flu foc For for fos fra fre fre fro fun g m Gal gal gal gas gau gel gen geo geo geo gho gla gno gra gra gra gra Gre Gre gro gyr had hal har Har HD hea hel hel Her Her Hic hig hip hol hor hos hov Hub hun hyd hyd Hyd hyp IC ide ill ima imp imp inc inc ind ind inf inf inf inf inj ins ins int int int int int int int int inv inv ion iro Isl iso iso Jac jet jud jur kel Kep kil Kle Kui Lag lam Lap Lar lat law lea len lep Lib lig lim lin lin Lio lit loc LOF lon Lor low lum lun Lup Lyo mac mag mag mag mag mag mai man Mar mas mas mat Max mea mec Mei Mer Mer met met Met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxi pai pan par par par par pas pea pen per per per per Per pet pha Pho pho pho pho Pic Pis Pla pla pla pla Ple poa pol pol pol pol pop pos pos pow pra pre pre pre pri pri pri pro pro pro pro pro pro pro Pto pul puz qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea Rea rec rec red red ref ref reg rel rel rel rep res res res res ret Rhe rid rig ris Roe Ros rot rub rut Sag sam sat sca sca Sch sci sea sec sec see sel sem sen ser Sgr sha shi sho sid sig sim sin Sir ske sli smo soc sol sol sol sol sol sou sou spa spe spe spe spe sph spi spl spu sta sta sta sta sta ste ste sti sto str Str sub sub sub sul sup sup sup sup sur sus sym syn sys Tam Tay tel ten Ter Tha the the the thi thr tib tid tim tok Tor tot tra tra tra tra Tri tri tro tru tur twi Typ ufo ult unc uni uni uni upl ura uti val var vec vel ver ver vil vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yea You zer zod > >>