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
verbatim
  واژ-به-واژ   
vâž-be-vâž

Fr.: verbatim   

In exactly the same words; word for word.

From M.L. verbatim "word for word," from L. verbum "word," → verb.

Vâž-be-vâž, literally "word for word," from vâž, → word.

vergence
  گرایی   
gerâyi

Fr.: vergence   

Optics: A measure of the convergence or divergence of a pair of light rays, defined as the reciprocal of the distance between the point of focus and a reference plane.
Ophthalmology: The turning motion of the eyeballs toward or away from each other.

back formation from → convergence and → divergence, ultimately from L. vergere "to turn, bend, be inclined;" cognate with Pers. gardidan "to turn, to change," → version.

Gerâyi, from gerâyidan "to incline toward; to intend; to make for." Gerâ may be a variant of Mod.Pers. kil "bent, inclined" (k/g and l/r interchanges), from PIE base *klei- "to lean, incline," cognate with L. clinare "to bend" (E. declination, inclination, etc.), Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," P.Gmc. *khlinen (Ger. lehnen, E. lean).

verifiability principle
  پروز ِ راست-جُست-پذیری   
parvaz-e râst-jost-paziri

Fr.: principe de vérifiabilité   

In logical positivism philosophy, the claim that a statement is literally meaningful (it expresses a proposition) if and only if it either actually has been verified or could at least in principle be verified.

Quality noun from → verifiable; → principle.

verifiable
  راست-جُست-پذیر   
râst-jost-pazir

Fr.: vérifiable   

That can be verified. → verify; → verification; → verifiability principle.

verify; → -able.

verification
  راست-جُست   
râst-jost

Fr.: vérification   

The act of verifying. The state of being verified.
The process of research and examination required to establish correctness, authenticity, or validity.

Verbal noun of → verify.

verify
  راست-جُستن، راست-جست کردن   
râst-jostan, râst-jost kardan

Fr.: vérifier   

To ascertain the truth or correctness of, as by examination, research, or comparison.

M.E. verifien, from M.Fr. verifier, from M.L. verificare "to make true," from L. verus "true;" → -fy.

Râst-jostan, literally "to seek the truth, to seek the right," from râst "right, true; just, upright, straight" (Mid.Pers. râst "true, straight, direct;" Soghdian rəšt "right;" O.Pers. rāsta- "straight, true," rās- "to be right, straight, true;" Av. rāz- "to direct, put in line, set," razan- "order;" cf. Skt. raj- "to direct, stretch," rjuyant- "walking straight;" Gk. orektos "stretched out;" L. regere "to lead straight, guide, rule," p.p. rectus "right, straight;" PIE base *reg- "move in a straight line," hence, "to direct, rule") + jostan/juyidan "to seek, strive for" (Proto-Iranian *iud- "to struggle for something, to fight;" Av. yūδ- "to fight, struggle;" Mod.Pers. justan, juy- "to search, seek, ask for;" cf. Mid.Pers. vijuyihitan "to search, seek").

vernal
  بهاری   
bahâri (#)

Fr.: vernal   

Of or pertaining to spring. → vernal equinox.

From L. vernalis "of the spring," from vernus "of spring," from uēr "spring," cognate with Pers. bahâr, as below.

Bahâri of or pertaining to bahâr "spring;" Mid.Pers. wahâr "spring;" O.Pers. vāhara- "spring time," θūra-vāhara- "name of a spring month;" Av. vaηhar "spring;" cf. Skt. vasara- "relating or appearing in the morning;" Gk. ear "spring;" L. uēr "spring," vernus "of spring;" O.N. vār "spring;" Lith. vasara "summer;" O.C.S. vesna "spring."

vernal equinox
  هموگان ِ بهاری   
hamugân-e bahâri

Fr.: équinoxe vernal   

The point of intersection between the ecliptic and the celestial equator at which the Sun passes from south to north of the celestial equator during its apparent annual motion. The instant of this event. It occurs on March 20, 21 or rarely 19. At the vernal equinox, as with the → autumnal equinox, night and day are equal in length world over. Several thousands years ago the vernal equinox was in Aries, but because of precession it has now slid west into Pisces. Right ascension and celestial longitude are measured from the vernal equinox. Also known as spring equinox. → First Point of Aries.

vernal; → equinox.

vernal point
  نقطه‌ی ِ بهاری   
noqte-ye bahâri

Fr.: point vernal   

The intersection point between the → celestial equator and the → ecliptic from where the Sun apparently enters into the northern celestial hemisphere.

vernal; → point.

vernal-equinox year
  سال ِ هموگان ِ بهاری   
sâl-e hamugân-e bahâri

Fr.: année d'équinoxe vernal, année vernale   

The time interval between two successive passages of the Sun, when the true longitude of the Sun is considered. In other words, the interval during which the Sun's true longitude increases by 360 degrees. Its mean length for the epoch J2000.0 is 365.24236460 real solar days (approximately 365.2424 days). The vernal-equinox year, on which the Iranian calender is based, should not be confused with → tropical year. See also: A concise review of the Iranian calendar. → Iranian calendar

vernal; → equinox; → year.

vernier
  ورنیه   
vernier (#)

Fr.: vernier   

A small movable scale running parallel to the main graduated scale in certain measuring instruments, such as the → sextant, used to obtain a fractional reading of one of the divisions on the main scale. Also known as Vernier scale.

After the French mathematician Pierre Vernier (1580-1637), who invented the scale in 1631.

version
  گرداک   
gardâk

Fr.: version   

A particular form or variant of something.
An account of something, given from a specific point of view.

M.E., from M.Fr. version, from M.L. versionem (nominative versio) "a turning," from p.p. stem of L. vertere "to turn;" cognate with Pers. gardidan "to change," as below.

Gardâk, present stem of gardidan "to change, to turn" (Mid.Pers. vartitan "to change, to turn;" Av. varət- "to turn, revolve;" cf. Skt. vrt- "to turn, roll," vartate "it turns round, rolls;" L. vertere "to turn;" O.H.G. werden "to become;" PIE base *wer- "to turn, bend") + -âk noun suffix.

vertex
  تارک   
târak

Fr.: vertex, sommet   

Plural form: vertices.
1) Astro.: A point in the → celestial sphere toward which or from which the common motion of a group of stars is directed.
2) Math.: The → point where two → sides of a → plane figure or an → angle  → intersect.
3) In → graph theory, any of the points of which graphs are formed. Same as → node.

From L. vertex "highest point," literally "the turning point," originally "whirlpool," from vertere "to turn," cognate with Pers. vartidan, gardidan, → version.

Târak, variant târ "top, vertex, head, the middle of the head;" cf. Sogd. târ "summit, forehead;" Yaghnobi tôr(k) "the back of the head;" Yazghulami tur "summit, head;" Proto-Ir. *starH- "to spread," → expand; PIE *ster- "spread, extend."

vertical
  هجین   
hajin (#)

Fr.: vertical   

1) The apparent → direction of → gravity at the point of observation.
2) Being in a position or direction → perpendicular to the → plane of the → horizon. See also → normal.

Vertical, literally "of or at the vertex, directly overhead," from M.Fr. vertical, from L.L. verticalis "overhead," from L. vertex (genitive verticis) "highest point"

Hajin, from haj, variant hac "anything held vertical, erected in the manner of a spear" (Dehxodâ), may be from Proto-Ir. *hac- "to follow;" cf. Av. (+ *ā-) hac- "to stick to;" Mid.Pers. hâz- "to lead, guide;" → associate.

vertical circle
  پرهون ِ هجین، دایره‌ی ِ ~   
parhun-e hajin, dâyere-ye ~

Fr.: cercle vertical   

The greater circle on the celestial sphere which passes through → zenith, → nadir, and the star and whose plane is perpendicular to the plane of horizon. Same as → azimuth circle.

vertical; → circle.

vertical scaling
  مرپلش ِ هجین   
marpeleš-e hajin

Fr.:   

In computer science, a scaling in which the processing power of the same node/system is increased by increasing/decreasing its resources (CPU, memory, etc.). See also → horizontal scaling.

vertical; → scaling.

vertices
  تارکها   
târakhâ

Fr.: sommets, vertex   

Plural of → vertex.

vertex.

very
  بسیار   
besyâr (#)

Fr.: très   

In a high degree. → Very Large Telescope (VLT); → very massive star; → very high frequencies (VHF).

M.E.; O.Fr verai "true;" L. verax (genitive veracis) "truthful," from verus "true."

Besyâr, from bas "many, much" (Mid.Pers. vas "many, much;" O.Pers. vasiy "at will, greatly, utterly;" Av. varəmi "I wish," vasô, vasə "at one's pleasure or will," from vas- "to will, desire, wish").

very high frequencies (VHF)
  بسامدهای ِ بسیار بالا   
basâmadhâ-ye besyâr bâlâ

Fr.: très hautes fréquences   

Radio frequencies in the range 30 to 300 mega Hz.

very; → high; → frequency.

Very Large Array (VLA)
  آرست ِ بسیار بزرگ   
ârast-e besyâr bozorg

Fr.: Very Large Array (VLA)   

A radio interferometer consisting of 27 antennas, each 25 m in diameter, in a Y-shaped configuration. It is located about 100 km west of Socorro, New Mexico, and is operated by the United States National Radio Astronomy Observatory. The VLA has the resolution of a single antenna 36 km wide and the sensitivity of a dish 130 m across.

very; → large; → array.

<< < -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 > >>