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: 13116 Search : far
cathode ray
  پرتو ِ کاتودی   
partw-e kâtodi (#)

Fr.: rayon cathodique   

A kind of ray generated at the cathode in a vacuum tube, by the electrical discharge.

cathode; →ray.

catholic astrolabe
  اسطرلاب ِ هرگانی   
ostorlâb-e hargâni

Fr.: astrolabe catholique   

Same as → universal astrolabe.

Catholic, M.E., from Fr. catholique, from Church Latin catholicus "universal, general," from Gk. katholikos, from phrase kath' holou "on the whole, in general," from kata "about," → cata-, + genitive of holos "whole," → holo-; → astrolabe.

Ostorlâb, → astrolabe; hargâni, → universal.

cation
  کاتیون   
kâtion (#)

Fr.: cation   

Chemistry: A → positively charged → ion that is attracted to the → cathode in electrolysis. Any positively charged atom or group of atoms (opposed to → anion).

From cat-, → cathod, + → ion.

catoptric light
  نور ِ بازتابیک   
nur-e bâztâbik

Fr.: lumière catoptrique   

Light that is reflected from a curved surface mirror.

catoprtics; → light.

catoptric system
  راژمان ِ بازتابیک   
râžmân-e bâztâbik

Fr.: système catoprtique   

An optical system in which the light is reflected only.

catoprtics; → system.

catoptrics
  بازتابیک   
bâztâbik

Fr.: catroptique   

The area of → optics which treats of the laws and properties of light reflected from reflective surfaces.

From Gk. katoptrikos, from katoptron "mirror" (from kat-, → cata-, + op- "to see," → optics, + -tron suffix of instruments) + -ikos, → -ics.

Bâztâbik, from bâztâb, → reflection, + -ik, → -ics.

cattle
  دام   
dâm (#)

Fr.: bétail   

Domesticated quadrupeds held on a farm, especially oxen, bulls, and cows.

M.E. catel, from M.Fr. catel "property" (O.Fr. chatel), from M.L. capitale "property, stock," from L. capitalis "principal, chief," literally "of the head," from caput, → head.

Dâm, originally "nonferocious animal," especially "herbivorous quadrupeds such as cows, sheep, etc.;" Mid.Pers. dâm "creature, creation;" O.Pers. dā- "to put, make, create;" Av. dā- "to place, put, create," dāmay- "creation; creating; creator," dāmi.dāt- "creating the creation;" cf. Skt. dhā- "to put, to place;" Gk. tithemi "to put, to place;" L. facere "to do;" O.H.G. tuon; E. to do.

Cauchy's equation
  هموگش ِ کوشی   
hamugeš-e Cauchy

Fr.: équation de Cauchy   

A relationship between the → refractive index (n) and the wavelength of light (λ) passing through a medium. It is commonly stated in the following form: n = A + B2 + C4, where A, B, and C are constants characterizing the medium. The two-component Cauchy equation is n = A + B2, from which the dispersion becomes dn/dλ = -2B3 showing that dispersion varies approximately as the inverse cube of the wavelength. The dispersion at 4000 A will be about 8 times as large as at 8000 Å.

Named after Augustin Louis Cauchy (1789-1857), French mathematician and physicist who found the first equation of dispersion in 1836; → equation.

Cauchy's theorem
  فربین ِ کوشی   
farbin-e Cauchy

Fr.: théorème de Cauchy   

If f(x) and φ(x) are two → continuous functions on the → interval [a,b] and → differentiable within it, and φ'(x) does not vanish anywhere inside the interval, there will be found, in [a,b], some point x = c, such that [f(b) - f(a)] / [φ(b) - φ(a)] = f'(c) / φ'(c).

Cauchy's equation; → theorem.

causal
  بناری، بنارمند   
bonârmand, bonâri

Fr.: causal   

Of, involving, or constituting a cause; indicative of or expressing a cause.

Adj. from → cause.

causal structure
  ساختار ِ بنارمند   
sâxtâr-e bonârmand

Fr.: structure causale   

In → special relativity, the causal relationship between → events involving a → light cone.

causal; → structure.

causality
  بنارمندی   
bonârmandi

Fr.: causalité   

The relationship between causes and effects

Causality, from → causal + -ity.

Bonârmandi, from bonârcause + -mand suffix denoting relation, affinity + -i noun forming suffix.

causality principle
  پروز ِ بنارمندی   
parvaz-e bonârmandi

Fr.: principe de causalité   

The principle that cause must always precede effect.

causality; → principle.

causation
  بنارش   
bonâreš

Fr.: relation de cause à effet   

1) The act or process of causing; the act or agency which produces an effect.
2) The relation of → cause to → effect.

Verbal noun from → cause.

causative
  بنارنده   
bonârandé

Fr.: causatif, causal, responsable   

1) Effective or operating as a cause or agent.
2) Grammar: Expressing → causation; specifically, being a linguistic form that indicates that the subject causes an act to be performed or a condition to come into being (Merriam-Webster.com).

Ultimately from L. causativus, → cause; → -ive.

cause
  ۱) بنار؛ ۲) بناردن   
1) bonâr; 2) bonârdan

Fr.: 1) cause; 2) causer   

1) A → reason for an → action or → condition; something that brings about an → effect or a → result.
2) To be the cause of; bring about.

From L. causa "reason, purpose," of unknown origin.

Bonâr, from bon "basis, root, origin, ground", from Mid.Pers. bun "base, root, origin;" Av. buna- "ground" (cf. Skt. budhna- "ground, bottom, depth", L. fundus "bottom", PIE base *bhud-/*bhund-) + âr short form of âvar present stem of âvardan "to cause or produce; to bring," → production; compare with Ger. die Ursache "cause," from ur- "primal" + die Sache "thing, matter."

caustic
  سوچان   
sucân

Fr.: caustique   

1) Capable of burning, corroding, or destroying living tissue. A caustic substance.
2) Optics: The enveloping surface formed by light rays reflecting or refracting from a curved surface. → caustic curve, → caustic surface.

M.E., from O.Fr. caustique, from L. causticus "burning," from Gk. kaustikos "capable of burning," from kaust(os) "combustible," from kaiein "to burn" + -ikos, → -ic.

Sucân, from suc- "to burn," variant of suz-, suzidan, suxtan "to burn;" cf. Baluci suc-, soc-; Mid.Pers. sôxtan, sôzidan "to burn;" Av. base saoc- "to burn, inflame" sūcā "brilliance," upa.suxta- "inflamed;" cf. Skt. śoc- "to light, glow, burn," śocati "burns," (caus.) socayati, śuc- "flame, glow," śoka- "light, flame;" PIE base *(s)keuk- "to shine."

caustic curve
  خم ِ سوچان   
xam-e sucân

Fr.: courbe caustique   

The intersection of a → caustic surface with a plane passing through the beam of rays.

caustic; → curve.

caustic surface
  رویه‌ی ِ سوچان   
ruye-ye sucân

Fr.: surface cuastique   

In an → optical system, the → envelope of all the → reflected or → refracted rays (by a → mirror or a → lens respectively) which do not come to a common focal point because of geometrical → aberration. This occurs when parallel rays of light fall on a → concave mirror or when a → convex lens receives parallel light. In the case of → spherical aberration, the caustic surface has an axis of symmetry.

caustic; → surface.

causticity
  سوچانی   
sucâni

Fr.: causticité   

The quality of being physically caustic.

caustic; → -ity.

<< < -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 > >>