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: 13116 Search : far
visualization
  چشم‌دید   
cašm-did

Fr.: visualisation   

1) The act of visualizing (→ visualize).
2) The presentation of → information on a → screen.

Verbal noun of → visualize.

Cašm-did, Mid.Pers. cašm-did "visible," Mod.Pers. cašm-didâr by Tusi, in Pers. translation of Sufi's "Book of Fixed Stars," from cašm "eye" (Mid.Pers. cašm, Av. cašman- "eye," ākas- "to look," from prefix ā- + Proto-Iranian *kas- "to look, appear," cf. Skt. cáksus- "seeing") + did past stem of didan "to see" (Mid.Pers. ditan "to see, regard, catch sight of, contemplate, experience;" O.Pers. dī- "to see;" Av. dā(y)- "to see," didāti "sees;" cf. Skt. dhī- "to perceive, think, ponder; thought, reflection, meditation," dādhye; Gk. dedorka "have seen").

visualize
  چشم‌دید کردن   
cašm-did kardan

Fr.: visualiser   

1) To make → visual or → visible.
2) To present → image or → information on a → screen, usually a → computer  → display.

From → visual + → -ize; → visualization.

viticulture
  موکاری   
mowkâri (#)

Fr.: viticulture   

The science, production, and study of → grapes.

From L. viti(s) "vine" + → culture.

Mowkâri, from mowvine + kâri noun from kâštan "to cultivate," → culture.

VLT Interferometer (VLTI)
  اندرزنش‌سنج ِ VLT   
andarzanešsanj-e VLT

Fr.: interféromètre VLTI   

An interferometer using a combination of the four 8.2 m VLT telescopes with the assistance of one or more of the the four 1.8 m Auxiliary Telescopes in order to achieve a very high spatial resolution. The system works in the visible and near- and mid-infrared wavelengths.

Very Large Telescope (VLT); → interferometer.

vocabulary
  واژگان   
vâžgân (#)

Fr.: vocabulaire   

A set of words used by a → language, group, individual, or work, or in a field of → knowledge.

M.L. vocabularium "a list of words," from L. vocabulum "word, name, noun," from vocare "to name, call;" cognate with Pers. vâž, → word.

Vâžgân, from vâž, → word, + -gân suffix forming plural entities, from Mid.Pers. -gânag, -gâna, from Proto-Iranian *kāna-ka-.

vocal cord
  تار ِ آواز   
târ-e âvâz

Fr.: corde vocale   

The sharp edge of a fold of mucous membrane stretching along either wall of the larynx from the angle between the laminae of the thyroid cartilage to the vocal process of the arytenoid cartilage. Vibrations of these cords are used in voice production (The American Heritage).

voice; → cord.

Vogt-Russell theorem
  فربین ِ فوکت-راسل   
farbin-e Vogt-Russell

Fr.: théorème de Russell-Vogt   

The internal structure and all observable characteristics of a star (such as luminosity and temperature) are determined uniquely by its mass, chemical composition, and age. Same as → Russell-Vogt theorem.

Named after the German astronomer Heinrich Vogt (1890-1968) and the American astronomer Henry Norris Russell (1877-1957); → theorem.

voice
  آواز   
âvâz (#)

Fr.: voix   

Sounds made when speaking or singing.

M.E., from O.Fr. voiz, from L. vox "voice, sound, utterance, cry, call, speech, sentence, word," related to vocare "to call;" akin to Pers. âvâz "voice," as below.

Âvâz "voice, sound, song," related to âvâ "voice, sound, song" (both prefixed forms), bâng "voice, sound, clamour" (Mid.Pers. vâng), vâžé "word," variants vâj-, vâk-, vâ-, vâz-, vât-; Av. vacah- "word," vaocanghê "to decalre" (by means of speech), from vac- "to speak, say;" cf. Skt. vakti "speaks, says," vacas- "word;" Gk. epos "word;" L. vox "voice;" PIE base *wek- "to speak."

void
  تهی   
tohi (#)

Fr.: vide   

1) An empty space; a gap or opening; emptiness. → vacuum.
2) A large region of cosmic space without galaxies. The first of these voids to be discovered lies in the direction of → Bootes and is some 300 million → light-years across. It is estimated that voids take up about 98% of the volume of the Universe, with clusters of galaxies concentrated in the thin walls that surround them.

M.E. voide, from O.Fr. voide "empty, vast, wide, hollow," from L. vocivus "unoccupied, vacant," related to vacuus "empty," → vacuum.

Tohi "empty" (variants in dialects Tabari tisâ, Saraxsi, Lâsgardi, Sangesari tusâ, Aftari tussâ); Mid.Pers. tuhig; Av. taoš- "to become empty," pres. tusa-, caus. taošaya-, tusən "they lose their posture;" cf. Skt. tuccha-, tucchya- "empty;" L. tesqua, tesca "deserted place;" Rus. tošcij "hollow;" PIE base *teus- "to empty."

Voigt effect
  اسکر ِ فوکت   
oskar-e Voigt

Fr.: effet Vogt   

Double refraction occurring when a strong → magnetic field is applied to a vapor through which light is passing perpendicular to the field.

Named after Woldemar Voigt (1850-1919), a German physicist (1908, Magneto- und Elektro-optik, B. G. Teubner, Leipzig); → effect.

Voigt profile
  فراپال ِ فوکت   
farâpâl-e Voigt

Fr.: profil de Voigt   

A spectral profile in which a → spectral line is broadened by two types of mechanisms, one of which alone would produce a & rarr; Gaussian profile (usually, as a result of the → Doppler broadening), and the other would produce a → Lorentzian profile.

After Woldemar Voigt (1850-1919), a German physicist; → profile.

Volans
  ماهی ِ پرنده   
Mâhi-ye Parandé (#)

Fr.: Poisson volant   

The Flying Fish. A constellation in the southern hemisphere at 7h 40m right ascension, -70° declination. Originally called Piscis Volans, and invented by Johann Bayer (Uranometria, published in 1603). Abbreviation: Vol; Genitive: Volantis.

L. Volans "flying," from volare "to fly."

Mâhi-ye Parandé, from mâhi "fish" (Mid.Pers. mâhik; Av. masya-; cf. Skt. matsya-; Pali maccha-) + parandé "flying, flier," from paridan "to fly" (Mid./Mod.Pers. par(r) "feather, wing," Av. parəna- "feather, wing;" cp. Skt. parna "feather," E. fern; PIE *porno- "feather").

volatile
  پرا   
parrâ

Fr.: volatile   

A substance that vaporizes at relatively low temperatures (e.g. H2O, CO2, CO, CH4, NH3, and so forth). The opposite of volatile is → refractory.

M.E., from M.Fr. volatile, from L. volatilis "fleeting, transitory, flying," from p.p. stem of volare "to fly," of unknown origin.

Parrâ "flying," from paridan "to fly in the air," → Volans.

volatile element
  بن‌پار ِ پرا   
bonpâr-e parrâ

Fr.: élément volatile   

In → planetary science, any of a group of → chemical elements and → chemical compounds with relatively low → boiling points that are associated with a planet's or moon's → crust and/or → atmosphere. For example, H, He, C, N, O are underabundant (relative to the solar → photospheric values) in all types of → meteorites, including the C1 → carbonaceous chondrites. Any heating of the meteorite parent body subsequent to its formation would tend to drive the volatile elements out of the rock, whence it sublimated into → interplanetary medium.

volatile; → element.

volcanic
  آتشفشانی   
âtašfešâni (#)

Fr.: volcanique   

Of or relating to a volcano. Characterized by volcanoes.

volcano; → -ic.

volcanic eruption
  اسدرش ِ آتشفشانی   
osdareš-e âtašfešâni

Fr.: éruption volcanique   

The explosive ejection of superheated matter from a → volcano.

volcanic; → eruption.

volcanic explosivity index (VEI)
  دیشن ِ اسکفتندگی ِ آتشفشانی   
dišan-e oskaftandegi-ye âtašfešâni

Fr.: indice d'explosivité volcanique   

A logarithmic scale, ranging from 1 to 8, used to measure the intensity of volcano eruptions. The VEI is based on several factors: the degree of fragmentation of the volcanic products released by the eruption, the amounts of sulfur-rich gases that form stratospheric aerosols, the volume of the eruptions, their duration, and the height is reached. The largest eruptions (8) produce an amount of bulk volume of ejected → tephra of ~ 1,000 km3.

volcanic; → explosivity; → index.

volcanic vent
  دودکش ِ آتشفشانی   
dudkaš-e âtašfešâni (#)

Fr.: cheminée volcanique   

vent.

volcanic; → vent.

volcano
  آتشفشان   
âtašfešân (#)

Fr.: volcan   

An opening in the Earth's → crust from which → lava, → ash, and hot → gases flow or are → ejected during an → eruption.

From It. vulcano, from L. Vulcanus, → Vulcan.

Âtašfešân, literally "fire disperser, dispersing fire," from âtaš, → fire, + fešân contraction of afšân, from afšândan "to spread, scatter," Mid.Pers. afšân "to spread, to scatter;" ultimately from Proto-Ir. *apašan-, from root *šan- "to shake" (Cheung 2007).

volt
  ولت   
volt (#)

Fr.: volt   

The SI unit of potential difference, defined as the difference of potentials across the ends of a conductor in which a power 1 watt is liberated when a current of 1 ampere flows through it.

In honor of the Italian scientist Alessandro Volta (1745-1827), known for his pioneering work in electricity and the invention of the first battery.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc 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 cou Cra Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>