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: 13176 Search : in
waveguide
  موج‌بر   
mowjbar (#)

Fr.: guide d'ondes   

Any transmission medium, such as a hollow metal conductor, coaxial cable, or glass fiber, capable of confining and supporting the propagation of electromagnetic waves regardless of wavelength or mode of propagation.

wave; guide, M.E., from O.Fr. guider "to guide, lead," from Frankish *witan "show the way," from P.Gmc. *wit- "to know" (cf. Ger. weisen "to show, point out," wissen "to know;" O.E. witan "to see"). Cognate with Pers. bin- "to see" (present stem of didan "to see"); Mid.Pers. wyn-; O.Pers. vain- "to see;" Av. vaēn- "to see;" Skt. veda "I know;" Gk. oida "I know," idein "to see;" L. videre "to see;" PIE base *weid- "to know, to see."

Mowjbar, from mowj, → wave, + -bar "carrier," from bordan "to carry, lead" (Mid.Pers. burdan, O.Pers./Av. bar- "to bear, carry," barəθre "to bear (infinitive)," Skt. bharati "he carries," Gk. pherein, L. fero "to carry;" PIE base *bher- "to carry").

wavelength
  طول ِ موج، موج-طول   
tul-e mowj (#), mowj-tul (#)

Fr.: longueur d'onde   

The distance between two successive points in the wave that are characterized by the same phase of oscillation; e.g. → de Broglie wavelength; → Compton wavelength; → blaze wavelength; → peak wavelength; → center wavelength; → central wavelength; → cutoff wavelength.

wave; → length.

wavelet
  موجک   
mowjak

Fr.: ondelette   

A small wave; ripple.

wave + -let a diminutive suffix.

wavelet theory
  نگره‌ی ِ موجک   
negare-ye mowjak

Fr.: théorie des ondolettes   

A refinement of → Fourier analysis which enables to simplify the description of a complicated function in terms of a small number of coefficients. The formal history of wavelet theory began in the early 1980s when Jean Morlet, a French geophysicist, introduced the concept of wavelet and studied wavelet transform as a new tool for scientific signal analysis. In 1984, his collaboration with Alex Grossmann yielded a detailed mathematical study of the continuous wavelet transforms and their various applications. Although similar results had already been obtained 20-50 years earlier by several other researchers, the rediscovery of the old concepts provided a new method for decomposing functions.

wavelet; → theory.

wax
  موم   
mum (#)

Fr.: cire   

1) A substance that is secreted by bees and is used by them for constructing the honeycomb, that is a dull yellow solid plastic when warm, and that is composed of a mixture of esters, cerotic acid, and hydrocarbons; called also beeswax.
2) Any of various substances resembling the wax of bees (Merriam-Webster.com).

M.E. waxen, O.E. weaxan; cognate with Du. was, Ger. Wachs.

Mum "wax; wax-candle."

waxing
  فزاینده   
fazâyandé (#)

Fr.: montant   

Increasing in extent, quantity, intensity, power, etc.

Waxing, from wax, from M.E. wax "to grow bigger, greater;" O.E. weaxan "to increase, grow;" cf. O.H.G. wahsan, O.N. vaxa, Du. wassen, Ger. wachsen "to grow, increase;" cognate with Mid.Pers. waxš-, waxšidan "to grow;" Av. xaxš- "to grow," xaxša- "growth;" Skt. vaks- "to grow, become big;" Gk. auxein "to increase."

Fazâyandé "waxing, incresing," from fozudan, variant of afzudan "to add, increase" (Mid.Pers. abzudan "to increase, grow;" O.Pers. abijav- "to increase, add to, promote," from abi-, aiby- "in addition to; to; against" + root jav- "press forward;" Av. gav- "to hasten, drive;" Sk. jav- "to press forward, impel quickly, excite," javate "hastens").

waxing crescent
  هلال ِ فزاینده، برن ِ ~   
helâl-e fazâyandé, barn-e ~

Fr.: croissant montant   

The phase of the Moon between the → new moon and the → first quarter which first appears in the evening.

waxing; → crescent.

waxing gibbous
  کوژمانگ ِ فزاینده   
kužmâng-e fazâyandé

Fr.: lune gibbeuse montante   

The oval shape of the Moon a few days after the → first quarter.

waxing; → gibbous.

waxing moon
  مانگ ِ فزاینده   
mâng-e fazâyandé (#)

Fr.: lune montante   

The circumstance when the phase of the Moon is increasing from → new moon to → full moon.

waxing; → moon.

way
  راه   
râh (#)

Fr.: voie, chemin   

A road, track, or path.

M.E. wei(gh)e, wai, from O.E. weg "road, path;" cf. Du. weg, O.H.G. weg, Ger. Weg, Goth. wigs "way;" PIE base *wegh- "to move."

Râh "way, path" (from Mid.Pers. râh, râs "way, street," also rah, ras "chariot;" from Proto-Iranian *rāθa-; cf. Av. raθa- "chariot;" Skt. rátha- "car, chariot," rathyā- "road;" L. rota "wheel," rotare "to revolve, roll;" Lith. ratas "wheel;" O.H.G. rad; Ger. Rad; Du. rad; O.Ir. roth; PIE *roto- "to run, to turn, to roll");

WC Wolf-Rayet
  وُلف-رایه‌ی ِ WC   
Wolf-Rayet-e WC

Fr.: Wolf-Rayet WC   

A → Wolf-Rayet star whose spectrum is dominated by emission lines of ionized carbon: C III 5696 Å, C III / C IV 4650 Å, C IV 5801-12 Å. This type is divided in sub-types WC4 to WC9.
For theoretical models, a Wolf-Rayet star whose carbon abundance at surface is larger than nitrogen abundance and has the abundance ratio (C + O) / He < 1 (in number).

W short for Wolf-Rayet star, C for → carbon.

WC4 star
  ستاره‌ی WC4   
setâre-ye WC4

Fr.: étoile WC4   

A → WC Wolf-Rayet that its spectrum shows the following emission line characteristics: strong C IV 5801-12 Å, weak or absent C II 4267 Å, and moderate O V 5572-98 Å.

W, from → Wolf-Rayet; C, from → carbon; → star.

WC5 star
  ستاره‌ی WC5   
setâre-ye WC5

Fr.: étoile WC5   

A → WC Wolf-Rayet whose spectrum shows the following emission line characteristics: C III 5696 Å very weaker than C IV 5801-12 Å and C III weaker than O V 5572-98 Å.

W, from → Wolf-Rayet; C, from → carbon; → star.

WC6 star
  ستاره‌ی WC6   
setâre-ye WC6

Fr.: étoile WC6   

A → WC Wolf-Rayet whose spectrum shows the following emission line characteristics: C III 5696 Å very weaker than C IV 5801-12 Å and C III stronger than O V 5572-98 Å.

W, from → Wolf-Rayet; C, from → carbon; → star.

WC7 star
  ستاره‌ی WC7   
setâre-ye WC7

Fr.: étoile WC7   

A → WC Wolf-Rayet with a spectrum shows the following emission line characteristics: C III 5696 Å weaker than C IV 5801-12 Å and C III very stronger than O V 5572-98 Å.

W, from → Wolf-Rayet; C, from → carbon; → star.

WC8 star
  ستاره‌ی WC8   
setâre-ye WC8

Fr.: étoile WC8   

A → WC Wolf-Rayet with a spectrum shows the following emission line characteristics: C III 5696 Å stronger than C IV 5801-12 Å, C II 4267 Å absent, and O V 5572-98 Å weak or absent.

W, from → Wolf-Rayet; C, from → carbon; → star.

WC9 star
  ستاره‌ی WC9   
setâre-ye WC9

Fr.: étoile WC9   

A → WC Wolf-Rayet whose spectrum shows the following emission line characteristics: C III 569 Å stronger than C IV 5801-12 Å, C II 4267 Å present, and O V 5572-98 Å weak or absent.

W, from → Wolf-Rayet; C, from → carbon; → star.

weak
  نزار، تام، سست، کمنور، کمزور   
nezâr (#), tâm, sost (#), kamnur (#), kamzur (#)

Fr.: faible   

Not powerful or intense.
electroweak epoch, → electroweak force, → electroweak interaction, → weak anthropic principle, → weak arm spiral galaxy, → weak emission-line central star, → weak encounter, → weak equivalence principle, → weak force, → weak gravitational lensing, → weak interaction, → weak lensing, → weak nuclear force, → weak wind problem, → weak-line T Tauri star, → weak-wind O-type star.

From O.N. veikr "weak," cognate with O.E. wac "weak, pliant, soft," from P.Gmc. *waikwaz "yield," *wikanan "bend" (cf. Du. week "weak, soft, tender," O.H.G. weih "yielding, soft," Ger. weich "soft," from PIE base *weik- "to bend, wind"

Nezâr "weak, feeble, thin, slim; flesh without fat" (bâde-ye nezâr "a wine with minute alcohol," soxan-e nezâr "inconsistent, weak statement"), variant zâr, Mid.Pers. nizâr (prefixed *ni- + *zâr/*zar) "weak, feeble," Mid./Mod.Pers. zarmân "old man, deterioration," Av. zairina- "exhausting, slackening," zaurura- "weak through old age, decrepit," cf. Skt. jára- "wearing out, exhaustion," jaranā- "old, decayed," jarimán- "weakness through old age," Gk. geron "old man," L. granum "grain;" PIE base *ger- "wear away."
Tâm, → faint.
Sost, from Mid.Pers. sust "weak, lazy."
Kamnur, from kam "little, few; deficient, wanting; scarce" (Mid.Pers. kam "little, small, few," O.Pers./Av. kamna- "small, few") + nur, → light.
Kamzur, from ham + zur, → strength.

weak anthropic principle
  پروز ِ انسان-هستی ِ نزار   
parvaz-e ensân-hasti-ye nezâr

Fr.: principe anthropique faible   

A version of the → anthropic principle whereby the initial conditions in the → Universe are → constrained by the fact that → intelligent life has appeared.

weak; → anthropic; → principle.

weak arm spiral galaxy
  کهکشان ِ مارپیچ با بازوی ِ نزار   
kahkešân-e mârpic bâ bâzu-ye nezâr

Fr.: galaxie spirale à faibles bras   

A gas-rich galaxy that has weak stellar → spiral arms with → interarm gas and star formation more important than a typical → spiral galaxy, such as NGC 4414.

weak; → arm; → spiral; → galaxy.

<< < -es -it -sc 201 951 abe abs abs aca acc acc aco act ada adh ado aer aft air Alf alg alk alp Alt alt amb ana And ang ani ann ant ant ant apo app app Apu arc arg Arn art ass ast ast ast atm ato att aur aut avo azi bac bal bar bar bat Bea Bel bet bia big bin bio Bir bla bla blo Blu bol Boo bou box bre Bri bro bur cal cal Can cap car Car cat cau cel cen cen cha Cha cha che Chi chr cir cir civ cla clo clo CMB 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 coo cor cor cor Cos cos cos cou cou cra cri cro cry cul cur cyc D l dar dat day dea dec dec dec def def deg Del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis diu dog Dop dou Dra Dsc dus dwa dyn Dys Ear ecc eco edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ eru eth Eur eve exa exc exe exi exo exp ext ext ext fab fai Fan fea fem fer fie fil fir fir fla fli flu foc for for for fra fre fre fri fun fuz gal gal gal Gam gau Gau gen geo geo geo geo Gib glo gov gra gra gra gra gre gro Gui H-a hal Ham har Hay hea hei hel Hel her het hie hig hoa hom hor hot Hub Hug hur hyd hyd hyl 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 inv ion iro Isl iso iso Jab jet Jov Jup Kar Kep kil Kip 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 map mas mas mat Mau mea mea med Men mer Mes Met met mic mic Mie mil min Mir mix mod mol mom Moo mor mov mul mur n-b nan nat nea neg Ner neu new New NGC noc nom non non nor nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove Owl P-s Pal par par par par Pas pat pec pen per per per per per Pha pha pho pho pho phy pie pix Pla pla pla pla Pli Poi pol pol pol pol por pos pos pow pre pre pre pre pri pri pri pro pro pro pro pro pro pro pub pul pyc qua qua qua qua qui rad rad rad rad rad rad rai 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 rur S5- Sal sat sca sca Sch sci Scu sec sec sed sel sel sem seq set sha she sho sid sie sil sim sin sit sky slo sno sod sol sol sol sol son sou spa spa spe spe spe spe sph spi spo squ sta sta sta sta ste ste ste Sti sto str str sub sub sub sul sup sup sup sup sur sur syl syn sys tal Tay tel ten ter tex the the the the Tho thr tid tim Tit too Tor tra tra Tra tra Tra tri Tri tru tub tur two Typ ult ult unc uni uni uni upl 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 > >>