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
left
  چپ   
cap (#)

Fr.: gauche   

Of, pertaining to, or located on or toward the west when somebody or something is facing north. Opposite of → right.

M.E. left, lift, luft, O.E. left, lyft- "weak, idle," cf. Ger. link, Du. linker "left," from O.H.G. slinc, M.Du. slink "left," Swed. linka "limp," slinka "dangle."

Cap "left," from unknown origin.

left-hand rule
  رزن ِ دست ِ چپ   
razan-e dast-e cap

Fr.: règle de la main gauche   

See → Fleming's rules.

left; → hand; → rule.

left-handed
  چپال، چپدست   
capâl (#) , capdast (#)

Fr.: gaucher   

Using the left hand with greater ease than the right.

left; → hand + -ed.

Capâl, from cap, → left, + -al, → -al. Capdast, with dast, → hand.

leg
  ۱) لنگ؛ ۲) ساق   
1) leng (#); 2) sâq (#)

Fr.: jambe   

1) The part of the body from the top of the → thigh down to the → foot.
2) Anatomy: The lower limb of a human being between the → knee and the → ankle.

M.E., from O.Norse leggr; cognate with Dan. læg, Swed. läg "the calf of the leg."

Leng, related to Mid.Pers. zang "shank, ankle;" Av. zanga-, zənga- "bone of the leg; ankle bone; ankle;" Skt. jánghā- "lower leg;" maybe somehow related to E. → shank.

legal
  قانونی   
qânuni (#)

Fr.: légal   

1) Permitted by law; lawful.
2) Of or relating to law; connected with the law or its administration (Dictionary.com).

From M.Fr. légal or directly from L. legalis "legal, pertaining to the law," from lex (genitive legis) "law."

Qânuni, of or relating to qânun, → law.

legend
  چیروک   
cirok

Fr.: légende   

1) A non-historical or unverifiable story handed down by tradition from earlier times and popularly accepted as historical.
2) The body of stories of this kind, especially as they relate to a particular people, group, or clan (Dictionary.com).

M.E. legende "written account of a saint's life," from O.Fr. legende and directly from M.L. legenda literally, "(things) to be read," noun use of feminine of L. legendus, gerund of legere "to read" (on certain days in church).

Cirok, from Kurd. cirok "story, fable," related to Kurd. cir-, cirin "to sing, [to recite?];" Av. kar- "to celebrate, praise;" Proto-Ir. *karH- "to praise, celebrate;" cf. Skt. kar- "to celebrate, praise;" O.Norse herma "report;" O.Prussian kirdit "to hear;" PIE *kerH2- "to celebrate" (Cheung 2007).

legendary
  چیروکی   
ciroki

Fr.: légendaire   

Of, relating to, or of the nature of a legend.

legend; → -ary.

Legendre equation
  هموگش ِ لوژاندر   
hamugeš-e Legendre

Fr.: équation de Legendre   

The → differential equation of the form: d/dx(1 - x2)dy/dx) + n(n + 1)y = 0. The general solution of the Legendre equation is given by y = c1Pn(x) + c2Qn(x), where Pn(x) are Legendre polynomials and Qn(x) are called Legendre functions of the second kind.

Named after Adrien-Marie Legendre (1752-1833), a French mathematician who made important contributions to statistics, number theory, abstract algebra, and mathematical analysis; → equation.

Legendre transformation
  ترادیسش ِ لوژاندر   
tarâdiseš-e Legendre

Fr.: transformation de Legendre   

A mathematical operation that transforms one function into another. Two differentiable functions f and g are said to be Legendre transforms of each other if their first derivatives are inverse functions of each other: df(x)/dx = (dg(x)/dx)-1. The functions f and g are said to be related by a Legendre transformation.

Legendre equation; → transformation.

legislation
  قانونگذاری   
gânungozâri (#)

Fr.: législation   

1) The act of making or enacting laws.
2) A law or a body of laws enacted (Dictionary.com).

From Fr. législation, from L.L. legislationem, from legis latio, "proposing (literally 'bearing') of a law," → legislator.

Qânungoz&acric;ri "act or process followed by the qânungoz&acric;r", → legislator.

legislator
  قانونگذار   
qânungozâr (#)

Fr.: législateur   

1) A person who gives or makes laws.
2) A member of a legislative body (Dictionary.com).

From L. legis lator "proposer of a law," from legis, genitive of lex, → law, + lator "proposer," agent noun of latus "borne, brought, carried."

Qânungozâr, literally "he who places the law," from qânun, → law, + gozâr, present stem and agent noun of gozâštan "to place, put; perform; allow, permit," related to gozaštan "to pass, to cross," → trans-

Lemaître Universe
  گیتی ِ لومتر   
giti-ye Lemaître (#)

Fr.: Univers de Lemaître   

A cosmological hypothesis, based on Einstein's relativity, in which the expanding Universe began from an exploding "primeval atom." In the Lemaître Universe the rate of expansion steadily decreases.

Named after Monsignor Georges Edouard Lemaître (1894-1966), a Belgian Roman Catholic priest, honorary prelate, professor of physics and astronomer; → universe.

lemma
  نهک   
nehak

Fr.: lemme   

1) A subsidiary proposition, proved for use in the proof of another proposition.
2) Linguistics: A word considered as its citation form together with all the → inflected forms. For example, the lemma go consists of go together with goes, going, went, and gone.
3) An argument or theme, especially when used as the subject or title of a composition (Dictionary.com).

From L. lemma, from Gk. lemma "something received or taken; an argument; something taken for granted," from root of lambanein "to take," → analemma.

Nehak, from neh present stem of nehâdan "to place, put; to set," → position, + -ak a diminutive suffix of nouns.

lemniscate of Bernoulli
  لمنیسکات ِ برنویی   
lemniskât-e Bernoulli

Fr.: lemniscate de Bernoulli   

A closed curve with two loops resembling a figure 8. It is represented by the Cartesian equation (x2 + y2)2 = a2(x2 - y2), where a is the greatest distance from the origin (pole) to the curve. Its polar equation is r2 = a2 cos 2θ.

From L. Latin lemniscatus "adorned with ribbons," from lemniscus "a pendent ribbon," from Gk. lemniskos "ribbon;" First described by Jacques Bernoulli (1654-1705) in 1694.

length
  درازا، طول   
derâzâ (#), tul (#)

Fr.: longueur   

A distance determined by the extent of something specified. → Jeans length

M.E. length(e), O.E. lengthu "length," from P.Gmc. *langitho, noun of quality from *langgaz (root of O.E. lang "long," cognate with Pers. derâz, as below) + -itho, abstract noun suffix. Cognate with O.N. lengd, O.Fris. lengethe, Du. lengte.

Derâzâ quality noun of derâz "long," variants Laki, Kurdi derež; Mid.Pers. drâz "long;" O.Pers. dargam "long;" Av. darəga-, darəγa- "long," drājištəm "longest;" cf. Skt. dirghá- "lon (in space and time);" L. longus "long;" Gk. dolikhos "elongated;" O.H.G., Ger. lang; Goth. laggs "long;" PIE base *dlonghos- "long;" tul loan from Ar. ţaul, used in → wavelength.

length contraction
  ترنگش ِ درازا   
terengeš-e derâzâ

Fr.: contraction de longueur   

Same as → Lorentz contraction.

length; → contraction.

lengthy
  کشناک   
kešnâk (#)

Fr.: long, interminable   

1) Having or being of great length; very long.
2) Tediously verbose; very long; too long (Dictionary.com).

From → length + -y.

Kešnâk "lengthy" (Bardsiri, Kermâni), from kešidan, kašidan "to draw, protract, trail, drag, carry," → tide. Bardesir, Kermân

lens
  عدسی   
adasi (#)

Fr.: lentille   

A transparent optical component consisting of one or more pieces of optical glass with surfaces so curved (usually spherical) that they serve to converge or diverge the transmitted rays from an object, thus forming a real or virtual image of that object.

From L. lens (gen. lentis) "lentil," cognate with Gk. lathyros, on analogy of the double-convex shape.

Adasi, related to adas "lentil," from Ar. 'adas.
The original Pers. terms for lentil are: mažu, mažâné, (Gilaki, Tabari) marju, marji, murje, marjum, (Laki) noži, (Aftari) marju, Mid.Pers. mijûg "lentil;" cf. Skt. masura- "lentil."

lens system
  راژمان ِ عدسی   
râžmân-e adasi

Fr.: système de lentilles   

optical system.

lens; → system.

Lense-Thirring effect
  اسکر ِ لنزه-تیرینگ   
oskar-e Lense-Thirring

Fr.: effet Lense-Thirring   

An effect predicted by → general relativity whereby a rotating body alters the → space-time around it. This effect can be thought of as a kind of "dragging of inertial frames," as first named by Einstein himself. A massive spinning object pulls nearby objects out of position compared to predictions for a non-rotating object. The effect is important for rapidly rotating → neutron stars and → black holes, but that near Earth is extraordinarily small: 39 milli-arc second per year, about the width of a human hair seen from 400 meters away.

Named after Austrian physicists Joseph Lense (1890-1985) and Hans Thirring (1888-1976), who first discovered this phenomenon in 1918; → effect.

<< < -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 > >>