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: 12992 Search : far
practical
  ورزال   
varzâl

Fr.: pratique   

Concerned with practice, as opposed to → theory.

practice; → -al.

practice
  ۱) ورزیدن؛ ۲) ورزه   
1) varzidan (#); 2) varzé (#)

Fr.: 1) pratiquer; 2) pratique   

1a) To do habitually or regularly.
1b) To exercise or follow as a profession.
2a) Performance; the doing of something (contrasted with → theory). See also → praxis.
2b) Way of doing something that is common or habitual.
2c) Frequent or systematic repetition in doing something.

M.E. practisen, practizen; O.Fr. practiser "to practice," from M.L. practicare "to do, perform," from L.L. practicus "practical," from Gk. praktikos "practical."

1) Varzidan "to practice, perform; to accustom oneself to; to labor; to sow a field;" Mid.Pers. warz- "to work, do, practice;" Av. varəz- "to work, do, perform, exercise;" cf. Gk. ergon "work;" Arm. gorc "work;" Lith. verziu "tie, fasten, squeeze," vargas "need, distress;" Goth. waurkjan; O.E. wyrcan "work," wrecan "to drive, hunt, pursue;" E. work; PIE base *werg- "to work."
2) varzé, noun from present stem varz- + suffix .

practicing
  ورزنده   
varzandé

Fr.: pratiquant   

Actively following a specified career or way of life.

practice; → -ing.

practitioner
  ورزمند   
varzmand

Fr.: praticien   

A professional man, especially in medicine and the law.

Alteration of practician, → practice (+ -ian) + -er, → -or.

Varzmand, from varz, → practice, + -mand, → -ist.

Praesepe
  پرایسپه، کندو، آخور   
Perâysepé, Kandu, Âxor

Fr.: la Crèche   

An → open cluster in the constellation → Cancer containing about 50 stars of 6th magnitude or fainter. It lies 577 light-years away. Also called NGC 2632, the Beehive Cluster, or the Manger.

From L. praesepe "crib," from which cattle or horses are fed, manger; the neighboring brighter stars Gamma and Delta Cancri (Asellus Borealis and Asellus Australis) were pictured as asses which fed from a manger.

Perâysepé, loan from L., as above.
Kandu "beehive; a large earthen vessel in which grain is kept;" cf. Skt. kunda- "a bowl-shaped vessel, basin; the lower abdomen."
&ACIRC;xor "manger," prefixed xor "to eat" (semantically like E. manger, Fr. mangeoire, from L. manducare, mandere "to chew, eat"), from Mid.Pers. âxwarr; Av. avô-xvarəna- "drinking fountain; a water spring," from avô- "water" + xvarəna-, from xvar- "to consume, eat;" Mid.Pers. xvardan "to eat, enjoy (food);" Mod.Pers. xordan "to eat, drink, devour," Laki dialect hovârden "to eat;" Proto-Iranian *huar- "to consume, eat."

pragmatic
  ورزال‌گرا   
varzâl-gerâ

Fr.: pragmatique   

Concerned with practical results and values; treating things in a practical way.

M.Fr. pragmatique, from L. pragmaticus "skilled in business or law," from Gk. pragmatikos "versed in business," from pragma (genitive pragmatos) "civil business, deed, act," from prassein "to do, act, perform."

Varzâl-gerâ, literally "practice-inclined," from varzâl, → practical, + -gerâ "inclining toward, intending, making for," → -ist.

pragmatics
  ورزال‌گراییک   
varzâl-gerâyik

Fr.: pragmatique   

A branch of → semiotics dealing with the relation between language and the users, especially the constraints they encounter in using language in social interaction, and the corresponding effects on other users in the communication.

pragmatic; → -ics.

pragmatism
  ورزال‌گرایی   
varzâl-gerâyi

Fr.: pragmatisme   

Philo.: The doctrine that the truth or value of a concept or assertion is determined by its practical effects upon human interests.

pragmatic; → -ism.

Prandtl number
  عدد ِ پرانتل   
adad-e Prandtl

Fr.: nombre de Prandtl   

A dimensionless number representing the ratio of the fluid viscosity to the thermal conductivity of a substance; a low number indicates high convection.

Named after the German physicist Ludwig Prandtl (1875-1953); → number.

praxis
  ورزیدار   
varzidâr

Fr.: praxis   

1) The practice and practical side of knowledge or skills, as opposed to the → theory.
2) Accepted practice or custom.

M.L. praxis "practice, action," from Gk. praxis "practice, action, doing," from stem of prassein "to do, to act."

Varzidâr, from varzid past stem of varzidan, → practice, + -âr prefix forming nouns of action, such as kerdâr, raftâr, didâr, goftâr, jostâr, etc.

pre-cluster core
  مغزه‌ی ِ پیش-خوشه‌ای   
maqze-ye piš-xuše-yi

Fr.: cœur pré-amas   

A precursor of a small, loosely bound → star cluster (→ bound cluster) as well as an → OB association, with masses ranging from about 10 to 1000 → solar masses or more.

pre-; → cluster; → core.

pre-degenerate star
  ستاره‌ی ِ پیش-واگن   
setâre-ye piš-vâgen

Fr.: étoile pré-dégénérée   

Same as → PG 1159 star.

post-; → degenerate; → star.

pre-dispersion
  پیش-پاشش   
piš-pâšeš

Fr.: pré-dispersion   

A technique in spectroscopy which uses a combination of several dispersive elements (prisms in series or a grism) before focusing the light on the primary disperser, usually a grating, in order to achieve high spectral resolutions.

pre-; → dispersion.

pre-main sequence binary
  درین ِ پیش-رشته‌ی ِ فریست   
dorin-e piš-rešte-ye farist

Fr.: binaire pré-séquence principale Markarian's Chain   

A → binary system whose components are → pre-main sequence stars.

pre-; → main sequence; → binary.

pre-main sequence B[e] star (HAeB[e])
  ستاره‌یِ B[e]ی ِ پیش-رشته-ی فریست   
setâre-ye B[e]-ye piš-rešte-ye farist

Fr.: étoile B[e] pré-séquence principale   

A → Herbig AeBe star displaying → forbidden emission lines in its spectrum.

pre-; → main; → sequence; → B[e] star.

pre-main sequence star
  ستاره‌ی ِ پیش-رشته‌ی ِ فریست   
setâre-ye piš-rešte-ye farist

Fr.: étoile pré-séquence principale   

A star that evolves in the → Hayashi phase and has not yet reached the → zero-age main sequence.

pre-; → main sequence, → star.

pre-nova stage
  گامه‌ی ِ پیش-نو-اختری   
gâme-ye piš-now-axtari

Fr.: étape pré-nova   

The stage of a star before its eruption to become a nova.

pre-; → nova; → stage.

pre-stellar
  پیش-ستاره‌ای   
piš-setâreyi

Fr.: pré-stellaire   

An adjective relating to a stage before the formation of a → protostar. → pre-stellar core.

pre-; → stellar.

pre-stellar core
  مغزه‌ی ِ پیش-ستاره‌ای   
maqze-ye piš-setâreyi

Fr.: cœur pré-stellaire   

A small, gravitationally unstable molecular → clump of typical size of less than 0.1 pc resulting from → gravitational collapse and → fragmentation of a larger → molecular cloud. It is a centrally concentrated structure which evolves into a → class 0 object, where eventually a single star or a stellar system is formed. Core masses range between 0.5 and 5 solar masses, with a mean number density of at least 104-105 cm-3, and a temperature as low as about 10 K. A pre-stellar core evolves into a → Class 0 object. Also called dense core.

pre-stellar; → core.

pre-WD star
  ستاره‌ی ِ پیش-کوتوله‌ی ِ سفید   
setâre-ye piš-kutule-ye sefid

Fr.: étoile pré-naine blanche   

A → post-planetary nebula star that is approaching the top of the → white dwarf sequence. These stars have exhausted the capacity of → nuclear burning in their cores.

pre-; → white; → dwarf.

<< < -es -iv -ti 21- a p abe abs abs acc acc acc act act ada adi ads aes Age Alb Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app app arc Arg ari art ass ast ast ast atm ato att Aur aut axi azi bac Bal Bar Bar Bay Bec Ber bet bic bij bin bio Bir bla Bla blu blu bol Boo bou bra Bre bro bug C r cal Cal can car Car Cas cat cau 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 Cop Cor cor cor cos cos Cou cou cow cre cri cro cry cur cut Cyg dam dar dat de deb dec dec ded def deg del dem den dep des det dev dia dif dif dig dio Dir dis dis dis dis dis dis div 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 eye fac fal Far fed fer fer fie fin fir fit fla flo flu fol for for Fou fra fre Fre fro fuz gai Gal Gal gam gas Gau gen gen geo geo geo gia glo gol gra gra gra gra gre gri gui H I hai Ham har Hau hea hec hel hel her HES hie hig his hom hor hot Hub hum Huy hyd hyd hyl hyp ice ide ima imm imp imp inc ind ind ine inf inf Inf inh inn ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jun K s Kep keV kin Kol lad Lam lan lar las lat lea leg len lev lig lik lin lin lin Lis lob loc log loo low lum lun lun Lym Mac Mag mag mag mag mag Mag mak map Mar mas mat Mau mea mea med Men mer Mes met met mho mic Mie Mil min mis MK mod mol mon moo mot mul mul mut nak Nas nat neb neg neu neu New New nip noi non non noo Nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phi pho pho pho phy pin 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 sle SMA SNR Sof sol sol sol sol sou Sou spa Sp spe spe spe sph spi Spi spr sta sta sta sta sta ste ste Ste sto str str sub sub sub suf sun sup sup sup sup sur swo syn sys tak Tay Tel ten ter tet the the the thi Tho thu tid tim toa top tot tra tra tra tra tri tri tro Tru tur twi Typ UBV ult unb uni uni Uni Unu ura uti val vap vec Vel ver Ver vie vir vis vis vol W-R war wav wav wea wei Whe Wid win WN4 Wol X-p Yal you zep zir > >>