An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13116 Search : far
ignition temperature
  دمای ِ گیرانش   
damâ-ye girâneš

Fr.: température d'inflammation   

The minimum temperature to which a fuel must be heated in order to initiate self sustained combustion independent of another heat source.

ignition; → temperature.

ignorable coordinate
  همارای ِ نادیده‌انگاشته   
hamârâ-ye nâdidé engâshté

Fr.: coordonnée ignorée   

A → generalized coordinate that does not appear explicitly in the → Lagrangian function. Also called → cyclic coordinate. Ignorable coordinates do not participate in the → Legendre transformation, and are also absent from the → Hamiltonian function. The generalized → momentum associated with an ignorable coordinate is a → constant of the motion.

ignore; → coordinate.

ignore
  نادیده‌انگاشتن   
nâdidé engâštan (#)

Fr.: ignorer, négliger   

To set aside, e.g. → ignorable coordinate.

From Fr. ignorer, from L. ignorare "not to know, disregard," from ignarus "not knowing, unaware," from in- "not," → un-, + gnarus "aware, acquainted with," related to gnoscere "to → know".

Nâdidé engâštan literally "supposed not seen," from nâdidé "not seen" (from nâ- "not," → un- + didé "seen," p.p. of didan "to see," → sight) + engâštan "to suppose" (→ hypothesis).

illuminance
  روشنایی، تنویی ِ ~   
rowšanâyi, tanuyi-ye ~

Fr.: éclairement lumineux   

Optics: Intensity of → illumination.
The amount of visible light incident per unit area of surface per second; measured in lux (lumens per unit square meter). → irradiance.

Rowšanâyi, → illumination; tanuyiintensity.

illumination
  روشنایی   
rowšanâyi (#)

Fr.: éclairement, illumination   

General: An act or instance of illuminating. The fact or condition of being illuminated.

Illumination, from O.Fr. illumination, from L. illuminationem (nom. illuminatio), from illuminare "to throw into light," from → in- "in" + lumen "light," cognate with Pers. rowšan, as below.

Rowšanâyi, noun of quality and state from rowšan "bright, clear," related to ruz "day," foruq "light," and afruxtan "to light, kindle," rowzané "window, aperture;" Mid.Pers. rôšn "light; bright, luminous," rôc "day," rocânak "window;" O.Pers. raucah-, Av. raocana- "bright, shining, radiant," raocah- "light, luminous; daylight;" akin to Skt. rocaná- "bright, shining," roka- "brightness, light;" Gk. leukos "white, clear;" L. lux "light," also lumen "light, window," luna "Moon;" E. light; Ger. Licht; Fr. lumière; PIE base *leuk- "light, brightness."

illusion
  سفمان   
safmân (#)

Fr.: illusion   

1) A false sense impression of something actually present.
2) Something that produces a false or misleading impression of reality. → optical illusion.
3) An instance of being deceived.

From O.Fr. illusion "a mocking," from L. illusionem (nom. illusio) "a mocking, irony," from illudere "to mock at," literally "to play with," from in- "at" + ludere "to play," from ludus "a game, play;" PIE base *leid- "to play, jest."

Safmân, literally "wrong thought, ~ idea," from saf "wrong" (Tâleši), → false, + mân "thought," → idea.

image
  ۱) وینه، تصویر؛ ۲) وینه گرفتن، ~ برداشتن   
1) vine, tasvir (#); 2) vine gereftan, ~ bardâštan

Fr.: image   

1) In an optical system, the point to which light rays are converged (real image) or from which they appear to diverge (virtual image) after reflection or refraction.
Math.: A number, point, or unique element of a space that corresponds to some other number, point, or unit element.
2) To make an image of; to picture or represent in the mind.

From O.Fr. image, from L. imaginem (nom. imago) "copy, picture, likeness " from stem of imitari "to copy, imitate," from im-, stem of imitare "to copy, imitate" + -ago noun suffix.

1) Vine, from (Sorani) Kurd. vina or vena "image, picture; similar," from vin/ven, variant of bin, present stem of dîtin, Pers. didan "to see, to look;" cf. Taleshi vinde "to see," Tati vindiyan "to see," Persian bin-, didan "→ see." The relation between "image" and "see" is probably from the fact that the image of a subject can be seen without its presence.
Tasvir, loan from Ar.
2) Infinitive with gereftan "take," → take, and dâštan "to have, to hold," → property.

image co-adding
  هم‌افزایش ِ وینه‌ها، ~ تصویرها   
hamafzâyeš-e vinehâ, ~ tasvirhâ

Fr.: addition d'images   

The process of adding several usually low-exposure images to create an image having a significantly higher signal/noise ratio.

image; → co-; → add.

image deblurring
  تیگش ِ وینه، ~ تصویر   
tigeš-e vine, ~ tasvir

Fr.: correction de l'image brouillée   

A technique using a mathematical model of the blurring process to recover the original, sharp image. See also → blurred image.

image; → deburring.

image formation
  دیسش ِ وینه، ~ تصویر   
diseš-e vine, ~ tasvir

Fr.: formation de l'image   

The meeting of light rays emanating from an object after crossing an optical system.

image; → formation.

image intensifier
  تنوگر ِ وینه، ~ تصویر   
tanugar-e vine, ~ tasvir

Fr.: intensificateur d'image   

Device that produces an observable image that is brighter at output than the image at input.

image; → intensifier.

image plane
  هامن ِ وینه، ~ تصویر   
hâmon-e vine, ~ tasvir

Fr.: plan d'image   

The plane in which is formed an image produced by an → optical system.

image; → plane.

image point
  نقطه‌ی ِ وینه، ~ تصویر   
noqte-ye vine, ~ tasvir

Fr.: point image   

One of the points constituting an extended image formed in an → optical system.

image; → point.

image processing
  آمایش ِ وینه، ~ تصویر   
âmâyeš-e vine, ~ tasvir

Fr.: traitement d'image   

The use of techniques to produce, extract, identify, and display images for evaluation, interpretation, and further interaction with the data.

image; → processing.

image quality
  چونای ِ وینه، ~ تصویر   
cunâ-ye vineh, ~ tasvir

Fr.: qualité d'image   

1) The degree of visibility of relevant → information in an image.
2) The → full-width at half-maximum of a long exposure stellar image obtained by an instrument mounted on a telescope observing in the presence of → seeing.

image; → quality.

image resolution
  واگشود ِ وینه، ~ تصویر   
vâgošud-e vine, ~ tasvir

Fr.: résolution d'image   

The separation between two detached but adjacent points in an image.

image; → resolution.

image restoration
  بازسازی ِ وینه، ~ تصویر   
bâzsâzi-ye vine, ~ tasvir (#)

Fr.: restauration d'image   

The process by virtue of which the original image can be created by removing the blurring and the noise that occur during image formation.

image; → restoration.

image scale
  مرپل ِ وینه، ~ تصویر   
marpel-e vine, ~ tasvir

Fr.: échelle de l'image   

The quantity that relates the length on the image to the angular or physical separations on the sky.

image; → scale.

image space
  فضای ِ وینه، ~ تصویر   
fazâ-ye vine, ~ tasvir

Fr.: espace image   

In an → optical system, the space defined by the totality of → image points. The corresponding points in image space and → object space are called → conjugate points.

image; → space.

image tube
  لوله‌ی ِ وینه‌گر، ~ تصویرگر   
lule-ye vinegar, ~ tasvigar

Fr.: tube imageur   

A device for amplifying faint images by electronic means. Electrons, released when the incident radiation forms a pattern on a photocathode, are accelerated by a magnetic field so that they form a second, brighter image when they strike a phosphor screen.

image; → tube.

<< < -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 > >>