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: 12942 Search : far
Przybylski's star
  ستاره‌ی ِ شبیلسکی   

Fr.: étoile de Przybylski   

A blue star, named HD 101065 or V816 Cen, with an extremely peculiar chemical composition and spectral features. Although the star has a surface temperature very close to that of stars with solar chemical composition, it displays some abundance anomalies typical of much hotter → Ap stars. The spectrum is dominated by a group of lines of → lanthanides, while in the spectra of normal stars with similar temperature the absorption lines of neutral elements from the iron group are predominant. The lanthanides may have abundances 103-104 times solar. The spectrum of Przybylski's star also shows the presence of radioactive → rare earth elements, such as → promethium and → technetium. Moreover, there are numerous strong absorption lines which defy identification. In some spectrum regions unidentified lines are more numerous than known lines. It is also a → roAp star (see, e.g., Gopka et al. 2008, Kinematics and Physics of Celestial Bodies Vol. 24, No. 2, 89).

Named after its discoverer, Antoni Przybylski (1961, Nature 189, 739).

Psamathe
  پسامته   
Psâmaté

Fr.: Psamathé   

A → retrograde irregular satellite of → Neptune discovered in 2003. Also known as Neptune X. According to preliminary estimates, it orbits Neptune at a distance of about 47 million km and takes almost 25 Earth years to make one orbit. It is about 38 kilometers in diameter.

In Gk. mythology, one of the Nereids, lover of Aeacus and mother of Phocus.

pseudo-
  دروژ-   
doruž-

Fr.: pseudo-   

A combining form meaning "false, erroneous, pretended, unreal," used in the formation of compound words (pseudonym, pseudoclassic, pseudointellectual). In scientific use, denoting close or deceptive resemblance to the following element (pseudogene, pseudobulb, pseudocarp).
pseudo-disk, → pseudo-Euclidean space, → pseudo-nucleus, → pseudo-Riemannian space, → pseudoscience.

From Gk. pseudo-, combining form of pseudes "false," or pseudos "falsehood," both from pseudein "to lie, cheat, falsify."

Doruž-, from Mid.Pers. druž "false, untrue, deceptive" (Mod.Pers. doruq "lie"), drôzitan, druxtan "to lie;" O.Pers. drauga- "lie;" Av. drug- "to lie," družaiti "he lies, cheats;" cf. Skt. druhyati "he lies," drôha-, drôgha- "insult, injury," druh- "damage; ghost;" O.H.G. triogan "to deceive;" Ger. trügen "to deceive;" E. dream; PIE base *dhrugh- "to deceive, harm."

pseudo-bulge
  دروژ-کوژ   
doruž-kuž

Fr.: pseudo-bulbe   

A general designation for both → box-peanut and → disk-like bulges. Although both, as opposed to the → classical bulges, show important rotational support, they also have different properties.

pseudo-; → bulge.

pseudo-disk
  دروژ-گرده   
doruž-gerdé

Fr.: pseudo-disque   

A mass structure around a → protostar that resembles an → accretion disk, but is in fact a simple flattened envelope.

pseudo-; → disk.

pseudo-Euclidean space
  فضای ِ دروژ-اقلیدوسی   
fazâ-ye doruž-Oqlidosi

Fr.: espace pseudo-euclidien   

A real vector space of dimension n having a symmetric bilinear form (x, y) such that in some basis e1, ..., en, the quadratic form (x2) takes the form x12 + ... + xn - 12 - xn2. Such bases are called orthonormal.

pseudo-; → Euclidean; → space.

pseudo-nucleus
  دروژ-هسته   
doruž-hasté

Fr.: pseudo-noyau   

Same → false nucleus.

pseudo-; → nucleus.

pseudo-Riemannian space
  فضای ِ دروژ-ریمانی   
fazâ-ye doruž-Riemanni

Fr.: espace pseudo-riemannien   

A space with an affine connection (without torsion), at each point of which the tangent space is a → pseudo-Euclidean space (Encyclopedia of Mathematics, Kluwer Academic Publications, Editor in chief I. M. Vinogradov, 1991).

pseudo-; → Riemannian; → space.

pseudonym
  دروژنام   
doružnâm

Fr.: pseudonyme   

A fictitious name used by an author to conceal his or her identity; pen name (Dictionary.com).

pseudo-; → name.

pseudoscience
  دروژ-دانش   
doruž-dâneš

Fr.: pseudoscience   

Any set of ideas, methods, or assertions that claims to be objective and scientific but that in fact does not seriously value or attempt to apply objectivity and → scientific method to its endeavors. Pseudoscientific statements are usually not → falsifiable by means of → objective experimental or observational evidence, in contrast to scientific statements that can be refuted. Pseudoscience uses scientific-sounding terminology but totally lacks scientific support. Among pseudoscience examples are → astrology, scientology, clairvoyance, and parapsychology.

pseudo-; → science.

Ptolemaic astronomy
  اخترشناسی ِ بتلمیوس، ~ بطلمیوس   
axtaršenâsi-ye Batlamyus (#)

Fr.: astronomie ptoléméenne   

Ptolemaic system.

Ptolemaic system; → astronomy.

Ptolemaic system
  راژمان ِ بتلمیوس، ~ بطلمیوس   
râžmân-e Batlamyus

Fr.: système de Ptolémée   

An empirical model developed by Ptolemy about 150 A.D., in which a motionless Earth was the center of the Universe. The Sun, Moon, and planets revolved around the Earth in → eccentric circles and → epicycles. The fixed stars were attached to an outer sphere concentric with Earth. The Ptolemaic system gave the positions of the planets accurately enough for naked-eye observations, although it also had serious defects. As an extreme example, according to Ptolemy's model for the Moon, our satellite should appear to be almost twice as large when it is full than it is at quadrature, which is an absurdity since it is not seen as such.

Claudius Ptolemaeus was a mathematician, geographer, astronomer, and astrologer. The most influential of Greek astronomers, he lived in Roman Egypt, and was probably born there; he died in Alexandria in 165 A.D.; → system.

public
  ۱) همگان؛ ۲) همگانی   
1) hamegân (#); 2) hamegâni (#)

Fr.: 1) public; 2) publique   

1a) The community or people in general.
1b) A particular group of people with a common interest, aim, etc.
2a) Of, relating to, or concerning the people as a whole.
2b) Open or accessible to all.
Related concepts: → all, → general, → omni-, → total, → universal.

M.E., from L. publicus "of the people; of the state," also "common, general, public; ordinary," and as a noun, "a commonwealth; public property," from Old L. poplicus "pertaining to the people." from populus "people."

Hamegân, from hamé, → all, + -gân suffix forming plural entities, from Mid.Pers. -gânag, -gâna.

public opinion
  پژان ِ همگانی   
pažân-e hamegâni

Fr.: opinion publique   

The collective opinion of many people on some issue, problem, etc., especially as a guide to action, decision, or the like (Dictionary.com).

public; → opinion.

publication
  واگانش   
vâgâneš

Fr.: publication   

1) The act of publishing a book, periodical, map, piece of music, engraving, or the like.
2) The act of bringing before the public; announcement.
3) The state or fact of being published (Dictionary.com).

Verbal noun of → publish.

publicity
  همگانیگی   
hamegânigi

Fr.: publicité   

1) Extensive mention in the news media or by word of mouth or other means of communication.
2) The state of being public, or open to general observation or knowledge (Dictionary.com).

public; → -ity.

publicize
  همگانیدن   
hameganidan

Fr.: rendre public; farie de la publicité pour   

To give publicity to; bring to public notice, advertise.

public; → -ize.

publish
  واگاندن   
vâgândan

Fr.: publier   

To issue (printed or otherwise reproduced textual or graphic material, computer software, etc.) for sale or distribution to the public (Dictionary.com).

M.E. publisshen, O.Fr. publier "make public, spread out, communicate," from L. publicare "make public," from publicus, → public.

Vâgândan "to diffuse, scatter, disperse," on the model of parâgandan, parâkandan "scatter, disperse," from vâ- "asunder, apart, off, away," → dis-, + gân variant of gan, kan (cf. Av. vikān- "to destroy," Kurd. nikândin "to bury"), from Proto-Ir. *kan- "to throw, place, put," → scatter.

publisher
  واگانگر   
vâgângar

Fr.: éditeur   

A person or company whose business is the publishing of books, periodicals, engravings, computer software, etc. (Dictionary.com).

Agent noun from → publish; → -er.

pulp
  گوپ   
gup

Fr.: pulpe   

1) The soft fleshy part of a fruit.
2) A soft moist shapeless mass of matter.

M.E., from L. pulpa "animal or plant pulp; pith of wood."

Gup, from Jâski gup "fleshy, fat;" cf. Gilaki quppe "watermelon core."

<< < -es -iv -ti 21- A r abe abs abs acc acc acc act act ada adi adu aff age alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg ari art ass ast ast ast atm ato att aur aut axi B r bac Bal Bar Bar Bay bec Ber Bet Bie bij bin bio bis bla bla blu blu bol Bor bou Bra bre bro Bug C-s cal Cam can car Car Cas cat cav cel cen cer Cha cha cha che cho cir cir cir 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 coo cor Cor cor cos cos cos Cou cou cra cre cro cru cub cur cyc Cyn dar dat day de- dec dec dec def def deg del den dep Des det deu dex die dif dif dil dip dir dis dis dis dis dis div dom Dor dou Dra duc dus dwa dyn e-t ear ecl eco eff Ein Ein ele ele ele ele ele elv emi emp ene enr epa epo equ equ Err Eta Eul eva evo exc exc exh exo exp exp ext ext Fab fai fan fau fel fer fic fil fin fir fla fli flu foc for for for fra fre fre fro fun fuz 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 hep Her hex hig Him hol hor hos hov Hub Hun hyd hyd hyd hyp IC ide ill Ima imp imp inc inc ind ine inf inf inf ini inp ins ins int int int int Int int int int inv ion Iri irr iso iso ite jel Jou JUp Kan Kep Kil kin Kra Lag Lam Lan Lar las law lea Leg Leo lev lig lim lin lin lin lit loc loc log Lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal mar mas mas mat max mea mec meg men mer met met Met mic mid Mil min Mir mix mod mod mol mon mor mov mul mur n-b nan nat nea neg Ner neu new New NGC noc nom non non nor nou nuc nuc num O-p obl obs obs oce Of? ohm omn opa Oph opt opt or orb ord Ori ort osc out ove ozo pal pan par par par par pat pec pen per per per per per Pfu pha pho pho pho phy pie pla Pla pla pla pla plu poi pol pol pol pol por pos pot pow pre pre pre pre pri pri pri pro pro pro pro Pro pro Prz pul pum Pyx 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 rhy rif Rin rob Rom rot rot rum S s Sak San sav sca Sch Sch scr sec sec SED sei sel sem seq sex Sha she sho sid sig sil sim sin siz sla Sma SNR Sof sol sol sol sol sou sou spa spe spe spe spe sph spi spo squ sta sta sta sta ste ste ste sto sto str str sub sub sub sum sup sup sup sup sur sus sym syn syz tan tea tem ten ter the the the the thi thr tid til tip tom tor tou tra tra tra tra Tri tri tru tsu tur two Typ ult umb unc uni uni unk upp urg uvb val var Veg vel ver vib vio vir vis Voi vow wan wat wav WC wea wel whi Wil wir WNh wor X-r Yer Z s zer [C > >>