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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<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara Arc ari Arr ash ass ast ast asy atm ato att aut ave axi Bab bal Bal bar bar bea Bek Bes bia Big bin bin bip biv bla bli blu Boh Bol Bos bou bra bri bro buo cal cal can cap car Car cat cat CCD Cen cen CH cha cha che Che chr cir cir cit cla clo clo clu Coa coe 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 Cop Cor cor cor cos cos cou cou Cow cre cri cro cry cur cya Cyg dan dar dat de- deb dec dec ded def deg del dem den dep des det dev dia dif dif dih dio Dir dis dis dis dis dis dis DO don dou dow dro dur dwa dyn Dys ear ebb ecl edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ esc eth Eur Eve exa exc exe exi exp exp ext ext ext fac fal far fed Fer fer fie fin fir fis fla flo flu fol for for fou fra fre Fre fro fut G-t gal gal gam gas Gau Gem gen geo geo geo gia Gli Gol gra gra gra gra gre gri gui H I Hag hal har hat He- hea hel Hel her Hes hie hig his hom hor hot Hub Hug hur hyd hyd hyg hyp ice ide ima Ima imp imp inc inc ind ine inf inf inf ing inn ins ins int int int int int int int int inv Io ion iro isl iso iso Jac jet jud jur Kel Kep kil Klo 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 Meg Mer Mer met met Met mic Mid Mil min Mir mit mod mod mol mon Mor mou mul mul mys nan Nat nau nec neo neu nev New NGC no nom non non nor not nuc nuc num nut obj obs obs occ ocu oft ome Oor ope opp opt opt orb ord ori ort osc out ove oxi pai pan par par par par pas pea pen per per per per Per per pha phi pho pho pho phy pio Pla pla pla pla Pla plu Poi pol pol pol poo pos pos pot pra pre pre pre pre pri pri pro pro pro pro pro Pro pro pse pul pur qua qua qua qua que rac rad rad rad rad rad rad ran rar ray rea rea rec rec red red ref ref reg rel rel rel ren res res res res ret rev Ric rig rin roc roo rot rot Rus Sac sal sat sca sca Sch sci Scu sec sec Sed sel Sel sen ser Sex Sha she sho sid sig sil sim sin siz sla Sma sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spi spr squ sta sta sta sta ste ste ste Sto Str str str sub sub suc sun sup sup sup sup sur swa syn syn tab tar tek tem ter tes the the the the Tho thr tid tim Tis Too Tor tra tra Tra tra tra tri tri tru Tul tur two Typ ult un- und uni uni unk upp Urc utt val var vec vel ver vib vio vir vis voi vor wan wat wav wax wea Wei whi Wil win WN9 wor X-r yel you zer zod > >>

Number of Results: 13048 Search : far
apparent magnitude
  برز ِ پدیدار   
borz-e padidâr

Fr.: magnitude apparente   

A measure of a star's observed brightness (opposed to → absolute magnitude); symbol m. It depends on the star's → intrinsic brightness, its distance from the observer, and the amount of → interstellar absorption. The brightest star → Sirius has an apparent magnitude of -1.46, while the weakest stars visible with the naked eye in the most favorable observation conditions have magnitudes of about +6.5. The stars of magnitudes less than +23 are measured by professional observatories, whereas those of magnitudes less than +30 by a telescope such as the → Hubble Space Telescope (M.S.: SDE).

apparent; → magnitude.

apparent noon
  نیمروز ِ پدیدار   
nimruz-e padidâr

Fr.: midi vrai   

The moment when the center of the Sun crosses the meridian. Same as true noon.

apparent; → noon.

apparent place
  جای ِ پدیدار   
jâ-ye padidâr

Fr.: position apparente   

Same as → apparent position.

apparent; → place.

apparent position
  نهش ِ پدیدار، جا‌ی ~   
naheš-e padidâr, jâ-ye ~

Fr.: position apparente   

1) The position on the celestial sphere at which a heavenly body would be seen from the Earth at a particular time.
2) A position given by the coordinates calculated for a star, if it were seen from the Earth's centre, relative to the → real equator and the → real equinox, at a certain date. It includes the displacements from one heliocentric direction, given in a stellar catalogue, due to → precession, → nutation, → aberration, → proper motions, → annual parallax, and light gravitational deviation (M.S.: SDE).

apparent; → position.

apparent rising
  بر‌آیش ِ پدیدار   
barâyeš-e padidâr

Fr.: lever apparent   

The instant of time when the object is in the East and the geometric → zenith distance is equal to 90° plus the → horizontal refraction plus the semidiameter minus the → parallax.

apparent; → rising.

apparent setting
  فروشد ِ پدیدار   
forušod-e padidâr

Fr.: coucher apparent   

The instant of time when the object is in the West and the geometric → zenith distance is equal to 90° plus the → horizontal refraction plus the semidiameter minus the → parallax.

apparent; → setting.

apparent sidereal day
  روز ِ اختری ِ پدیدار   
ruz-e axtari-ye padidâr

Fr.: jour sidéral apparent   

The time interval between two successive → upper transits of the → true equinox of date.

apparent; → sidereal; → day.

apparent sidereal time
  زمان ِ اختری ِ پدیدار   
zamân-e axtari-ye padidâr

Fr.: temps sidéral apparent   

The → mean sidereal time corrected for the → nutation and shift in the obliquity of the ecliptic that occurs as a result of the Moon's gravitational effect. Apparent sidereal time differs from mean sidereal time in that the → true vernal equinox point is used.

apparent; → sidereal; → time.

apparent solar day
  روز ِ خورشیدی ِ پدیدار   
ruz-e xoršidi-ye padidâr

Fr.: jour solaire vrai   

The duration of one rotation of the Earth on its axis (→ Earth's rotation), with respect to the → apparent Sun. It is measured by successive transits of the apparent Sun over the lower branch of a → meridian.

apparent; → solar day.

apparent solar time
  زمان ِ خورشیدی ِ پدیدار   
zamân-e xoršidi-ye padidâr

Fr.: temps solaire apparent   

The time based on the motion of the → apparent Sun and kept by dividing the day into 24 equal hours.

apparent; → solar; → time.

apparent Sun
  خورشید ِ پدیدار   
xoršid-e padidâr

Fr.: Soleil apparent   

The → true Sun as seen by an observer on Earth. The term "apparent Sun" is used in contrast to → mean Sun, which refers to an average of the Sun's position). See also: → apparent solar time and → mean solar time.

apparent; → Sun.

apparent visual magnitude
  برز ِ دیدگانی ِ پدیدار   
borz-e didegâni-ye padidâr

Fr.: magnitude visuelle apparente   

Apparent magnitude in the visual wavelengths, around 5600 Å. → visual magnitude.

apparent; → visual; → magnitude.

apparently
  پدیدانه   
padidâne

Fr.: apparemment   

Judging from what is apparent. As far as one knows or can see.

apparent; → -ly.

apparition
  پدیداری، پدیدارش   
padidâri (#), padidâreš

Fr.: apparition   

A period during which a → planet, → asteroid, or → comet is observable, generally between two successive → conjunctions of the body with the Sun.

M.E. apparicioun, from O.Fr. apparition, from L.L. appritionem "an appearance," from L. apparitus, p.p. of apparere "to appear."

Padidâri, n. from → padidâr + -i; padidâreš, verbal n. from *padidâridan.

appear
  پدیدار شدن   
padidâr šodan (#)

Fr.: apparaître   

1) Come into sight; become visible or noticeable.
2) To have the appearance of being; seem.

From M.E. apperen, aperen, from O.Fr. aparoir, aperer, from L. apparere, from → ad- + prarere "to come forth, become visible."

Padidâr šodan, literally "become apparent," from padidâr, → apparent, + šodan, → become.

apperception
  بر‌آگرتش   
barâgerteš

Fr.: aperception   

In psychology of education, the fundamental process in acquiring knowledge, and the part played by existing knowledge.

From Fr. aperception, from N.L. apperceptionem, from ap- variant of → ad- before p + → perception.

From prefix bar- "on, upon, up" (Mid.Pers. abar; O.Pers. upariy "above; over, upon, according to;" Av. upairi "above, over," upairi.zəma- "located above the earth;" cf. Gk. hyper- "over, above;" L. super-; O.H.G. ubir "over;" PIE base *uper "over") + âgerteš, → perception.

application
  آتاهش، کاربرد   
âtâheš, kârbord (#)

Fr.: application   

1) General: The act of applying to a particular purpose or use.
2) Computers: A program that performs a specific function for the user, as contrasted with an environment or operating system. Some examples are Microsoft Windows, Microsoft Word, and Adobe Photoshop. The word "application" is used because each program has a specific application for the user.

Verbal noun of → apply.

application software
  نرم‌افزار ِ آتاهشی   
narm-afzâr-e âtâheši

Fr.: logiciel d'application   

A software with a specific function, such as a word processor or game. Contrast with operating system software.

application; → software.

applied physics
  فیزیک ِ کاربردی   
fizik-e kârbordi (#)

Fr.: physique appliquée   

A set of topics in physics intended for a particular or practical use. Applied physics programs are usually interfaces between pure physics and technology.

Past participle of → apply; → physics.

apply
  آتاهیدن، به کار بردن   
âtâhidan, bé kâr bordan (#)

Fr.: appliquer   

To make use of; to put to use especially for some practical purpose.
To put into operation or effect.
To lay or spread on; to be placed or remain on.
To make a request especially in the form of a written → application.

From M.E. ap(p)lien, from O.Fr. aploiier "apply, use, attach," from L. applicare "to attach to, connect;" figuratively, "devote (oneself) to, give attention," from → ad- "to" + plicare "to fold," → explain.

Âtâhidan, from â- intensive/nuance prefix, + tâh "fold, plait, ply" (on the model of L., as above, → explain); Mid.Pers. tâg "piece, part" + -idan infinitive suffix.
Bé kâr bordan, from "to; for; in; on; with; by; according to," → ad hoc; kâr, → work, bordan "to carry, bear, conduct, take," → range.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara Arc ari Arr ash ass ast ast asy atm ato att aut ave axi Bab bal Bal bar bar bea Bek Bes bia Big bin bin bip biv bla bli blu Boh Bol Bos bou bra bri bro buo cal cal can cap car Car cat cat CCD Cen cen CH cha cha che Che chr cir cir cit cla clo clo clu Coa coe 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 Cop Cor cor cor cos cos cou cou Cow cre cri cro cry cur cya Cyg dan dar dat de- deb dec dec ded def deg del dem den dep des det dev dia dif dif dih dio Dir dis dis dis dis dis dis DO don dou dow dro dur dwa dyn Dys ear ebb ecl edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ esc eth Eur Eve exa exc exe exi exp exp ext ext ext fac fal far fed Fer fer fie fin fir fis fla flo flu fol for for fou fra fre Fre fro fut G-t gal gal gam gas Gau Gem gen geo geo geo gia Gli Gol gra gra gra gra gre gri gui H I Hag hal har hat He- hea hel Hel her Hes hie hig his hom hor hot Hub Hug hur hyd hyd hyg hyp ice ide ima Ima imp imp inc inc ind ine inf inf inf ing inn ins ins int int int int int int int int inv Io ion iro isl iso iso Jac jet jud jur Kel Kep kil Klo 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 Meg Mer Mer met met Met mic Mid Mil min Mir mit mod mod mol mon Mor mou mul mul mys nan Nat nau nec neo neu nev New NGC no nom non non nor not nuc nuc num nut obj obs obs occ ocu oft ome Oor ope opp opt opt orb ord ori ort osc out ove oxi pai pan par par par par pas pea pen per per per per Per per pha phi pho pho pho phy pio Pla pla pla pla Pla plu Poi pol pol pol poo pos pos pot pra pre pre pre pre pri pri pro pro pro pro pro Pro pro pse pul pur qua qua qua qua que rac rad rad rad rad rad rad ran rar ray rea rea rec rec red red ref ref reg rel rel rel ren res res res res ret rev Ric rig rin roc roo rot rot Rus Sac sal sat sca sca Sch sci Scu sec sec Sed sel Sel sen ser Sex Sha she sho sid sig sil sim sin siz sla Sma sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spi spr squ sta sta sta sta ste ste ste Sto Str str str sub sub suc sun sup sup sup sup sur swa syn syn tab tar tek tem ter tes the the the the Tho thr tid tim Tis Too Tor tra tra Tra tra tra tri tri tru Tul tur two Typ ult un- und uni uni unk upp Urc utt val var vec vel ver vib vio vir vis voi vor wan wat wav wax wea Wei whi Wil win WN9 wor X-r yel you zer zod > >>