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
oppose
  پادیستیدن   
pâdistidan

Fr.: s'opposer à, faire opposition à; opposer   

1) To act against or provide resistance to.
2) To stand in the way of; hinder; obstruct (Dictionary.com).

M.E., from O.Fr. oposer "to oppose, resist; contradict," from poser "to place, lay down," blended with L. opponere "to oppose, to object," → position.

Pâdistidan, infinitive from pâdist, → opposition.

opposite
  ۱) رو-به-رو؛ ۲) پارون؛ ۳) پادچم   
1) ru-be-ru; 2) pârun; 3) pâdcem

Fr.: 1) opposé, d'en face; 2) contraire, opposé; 3) antonyme   

1) Situated, placed, or lying face to face with something else or each other, or in corresponding positions with relation to an intervening line, space, or thing: opposite ends of a room (Dictionary.com).
2) Contrary or radically different in some respect common to both, as in nature, qualities, direction, result, or significance; opposed (Dictionary.com).
3) An → antonym.

M.E., from M.Fr., from L. oppositus, p.p. of opponere, → opposition.

1) Ru-be-ru "face to face," → surface.
2) Pârun, short for pâdrun, from pâd-, → counter, + -run "side, direction" (as in birun, darun, vârun), → out.
3) Pâdcem, → antonym.

opposition
  ۱، ۲) پادیست؛ ۳، ۴) پادیستان   
1, 2) pâdist; 3, 4) pâdistân

Fr.: opposition   

1) The action of opposing, resisting, or combating.
2) A person or group of people opposing, criticizing, or protesting something, someone, or another group (Dictionary.com).
3) The position of a solar system body having its orbit outside that of the Earth when the Earth is in a line between the Sun and the body. At opposition the body has a solar → elongation of 180°, and is closest to the Earth. It will, in principle, be visible throughout the night. It will rise in the east as the Sun sets in the west and it will set as the Sun rises. This is because, at opposition, the body and the Sun are 12 hours apart. The inner planets can never be in opposition. The opposite of opposition is → conjunction.
4) Two periodic quantities of the same frequency are said to be in opposition when the → phase difference between them is one half of a → period.

Verbal noun of → oppose.

Pâdist "standing against," from pâd- "agaist, contrary to," → anti-, + ist present stem of istâdan "to stand" (Mid.Pers. êstâtan, O.Pers./Av. sta- "to stand; to set;" Av. hištaiti; cf. Skt. sthâ- "to stand;" Gk. histemi "put, place, weigh," stasis "a standing still;" L. stare "to stand;" Lith. statau "place;" Goth. standan; PIE base *sta- "to set, stand").
Pâdistân, from pâdist + -ân suffix of place and time.

oppress
  ستمیدن   
setamidan (#)

Fr.: opprimer   

To burden with cruel or unjust impositions or restraints; subject to a burdensome or harsh exercise of authority or power (Dictionary.com).

M.E. oppressen, from O.Fr. opresser "oppress, torment, smother," from M.L. oppressare, from L. opprimere "press against, press together, press down; subdue, prosecute relentlessly," from op variant of ob "against" + premere "to press, hold fast."

Infinitive from setam, → oppression.

oppression
  ستم   
setam (#)

Fr.: oppression   

1) The exercise of authority or power in a burdensome, cruel, or unjust manner.
2) An act or instance of oppressing or subjecting to cruel or unjust impositions or restraints.
3) The state of being oppressed (Dictionary.com).

M.E. oppressioun, from O.Fr. opresser "oppress; torment," from M.L. oppressare, from L. opprimere "press against, press down;" from op, variant of ob "against" + premere "to press, hold fast."

Setam, from Mid.Pers. sthmbk / stambag / "oppressive; obstinate," related to sitabr "strong, firm," staft "hard; firm, strong; fierce," Pers. seft "firm, hard, tight;" sitanbah "strong, robust, bold;" Av. aša.stəmbana- "having the support/firmness of aša;" Lith stembti "to oppose;" Gk. astemphes "unshakable."

opt
  اپتیدن   
optidan

Fr.: opter   

To make a choice; choose (usually followed by for).

From Fr. opter "to choose," from L. optare "to choose, desire, wish for," from L. optare "to desire, choose," from PIE root *op- "to choose, prefer."

Optidan, from L. optare, as above.

optative
  اپتانه، اپتمند   

Fr.: optatif   

Of, relating to, or constituting a verbal mood that is expressive of wish or desire.

From M.Fr. optatif, from L. optativus, from optatus, p.p. of optare, → opt, + -ivus, → -ive.

Optâné, optmand, from opt present stem of optidan, → opt, + adj. suffixes -âné, -mand. -yi.

optic
  ۱) نوری، نوریک؛ ۲) دیدگانی   
1) nuri, nurik; 2) didgâni

Fr.: optique   

1) Of or pertaining to the eye or sight.
2) Same as → optical.

From M.Fr. optique, from M.L. opticus "of sight or seeing," from Gk. optikos "of or having to do with sight," from optos "seen, visible," from op-, root of opsesthai "be going to see," related to ops "eye," from PIE *okw- "eye/see."

1) Nuri, nurik, from nur, → light + -i, -ik adj. suffix → -ic.
2) Didgâni, related to didgân "eyes," plural of didé "eye; seen," from 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").

optic axis
  آسه‌یِ نوری   
âse-ye nuri

Fr.: axe optique   

The direction in a doubly refracting crystal in which light is propagated without double refraction.

optic; → axis.

optical
  ۱) نوری، نوریک؛ ۲) دیدگانی   
1) nuri, nurik; 2) didgâni

Fr.: optique   

1) Of, pertaining to, or applying optics or the principles of optics.
2) Of or pertaining to sight or vision; visual; of or pertaining to the eye.

From → optic + → -al.

optic.

optical aberration
  بیراهشِ نوری   
birâheš-e nuri

Fr.: aberration optique   

An imperfection in the imaging properties of a lens or mirror. The main aberrations are → chromatic aberration, → spherical aberration, → coma, → astigmatism, → field curvature, → distortion.

optical; → aberration.

optical activity
  ژیرندگیِ نوری   
žirandegi-ye nuri

Fr.: activité optique   

The property possessed by some substances and their solutions of rotating the plane of vibration of → polarized light. When a beam of → linearly polarized light is sent through an optically active substance, such as crystalline quartz and sugar solution, the direction of vibration of the emerging linearly polarized light is found to be different from the original direction. Those which rotate the → plane of polarization to the right, for an observer looking in the incoming beam, are called → dextrorotatory or right handed; those which rotate it to the left, → levorotatory or left handed. Optical activity may be due to an asymmetry of molecules of a substance (solutions of cane sugar) or it may be a property of a crystal as a whole (crystalline quartz).

optical; → activity.

optical analysis
  آنالسِ نوری   
ânâlas-e nuri

Fr.: analyse optique   

The mathematical evaluation of an optical system to determine its basic optical properties and image quality characteristics.

optical; → analysis.

optical autocorrelator
  خودهم‌باز‌آنگرِ نوری   
xod-hambâzângar-e nuri

Fr.: autocorrélateur optique   

An instrument used to test lenses by utilizing the → optical transfer function. It consists of a HeNe laser, a beamsplitter and two mirrors.

optical; → autocorrelator.

optical axis
  آسه‌یِ نوری   
âse-ye nuri (#)

Fr.: axe optique   

Line passing through the optical center and the center of curvature of a → spherical mirror or → lens. Same as → principal axis.

optical; → axis.

optical bench
  میز ِ نوریک، ~ نورشناختی   
miz-e nurik, ~ nuršenâxti

Fr.: banc optique   

A track or table on which sources, lenses, mirrors, and other optical components can be mounted and moved. It is used in optics experiments.

optical; bench, M.E., from O.E. benc "long seat;" cf. Da. bænk, M.Du. banc, O.H.G. banch.

Miz "table," originally "preparations for entertaining a guest; guest;" Mid.Pers. mêzd "offering, meal;" nurik, nuršenâxti, → optical.

optical center
  مرکزِ نوری   
markaz-e nuri (#)

Fr.: centre optique   

Of a thin lens, a point situated at the geometrical center of the lens, through which an incident ray passes without being deviated.

optical; → center.

optical component
  همنه‌ی ِ نوریک   
hamne-ye nurik

Fr.: composante optique   

Any device such as a → lens, → prism, → mirror, and/or other similar objects used in an → optical system.

optical; → component.

optical counterpart
  همتایِ نوری   
hamtâ-ye nuri

Fr.: contrepartie optique   

An astronomical object with usually weak emission in the → visible found to be the optical representation of the object radiating chiefly in other → wavelengths of the → electromagnetic spectrum.

optical; → counterpart.

optical density
  چگالیِ نوری   
cagâli-ye nuri

Fr.: densité optique   

The transmittance of a point on a photographic negative equal to the log to the base 10 of the reciprocal of the transmittance through the negative at that point.

optical; → density.

<< < -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 > >>