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: 13176 Search : in
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.

cavity
  کاواک   
kâvâk (#)

Fr.: cavité   

1) An apparently hollow formation in the structure of an astronomical object, for example a sizable hole on the surface of a → molecular cloud created by → ultraviolet photons of a → massive star.
2) In a semiconductor laser, two reflective parallel edges forming a resonator that amplifies the light through stimulated emission.

From M.Fr. cavité, from L.L. cavitas "hollowness," from L. cavus "hollow."

Kâvâk, related to verb kâvidan (kâftan) "to dig; to examine, investigate," cf. L. cavus "hollow" (E. derivatives: cavity, concave, cave, excavate), Gk. koilos "hollow," Armenian sor, PIE *kowos "hollow."

CCD
  سی‌سی‌دی   
si-si-di (#)

Fr.: CCD   

charge-coupled device.

Short for → charge + coupled, from → couple, + → device.

CCD array
  آرست ِ سی‌سی‌دی   
ârast-e sisidi

Fr.: détecteur CCD bidimensionnel   

A CCD detector having two dimensions.

CCD; → array.

CCD detector
  آشکارگر ِ سی‌سی‌دی   
âškârgar-e sisidi (#)

Fr.: détecteur CCD   

charge-coupled device.

CCD; → detector.

CCD frame
  تک تصویر ِ سی سی دی   
tak-tasvir-e sisidi

Fr.: image CCD   

One of a series of astronomical images obtained using a CCD detector in particular for calibration purposes.

CCD; → frame.

CCD gain
  بهره‌ی ِ سی‌سی‌دی   
bahre-ye CCD

Fr.: gain de CCD   

In a → CCD detector, the ratio of the initial number of electrons in a → pixel to the final number of → analog-to-digital units (or counts) reported by camera software. For example, a gain of 1.8 e-/count means that the camera produces 1 count for every 1.8 recorded electrons.

charge-coupled device (CCD); → gain.

CCD shutter
  بستار ِ سی‌سی‌دی   
bastâr-e si-si-di, bastâvar-e ~

Fr.: obturateur CCD   

A mechanical device of a CCD camera that controls the duration of a an exposure, as by opening and closing to allow the stellar light to expose the CCD detector.

Shutter, from to shut, from O.E. scyttan from W.Gmc. *skutjanan + → -er.

CDM model
  نگره‌ی ِ ماده‌ی ِ سرد ِ تاریک   
negare-ye mâdde-ye sard-e târik

Fr.: théorie de la matière noire froide   

A → cosmological model that attributes the formation of structures in the → early Universe to an exotic particle (→ cold dark matter) which was → non-relativistic at the time of → decoupling. According to this model, CDM began clumping together soon after the → Big Bang, while the → baryonic matter was still coupled with the → photons, and prevented to condense. Smaller → clumps of dark matter merged to form larger and larger clumps, and when the normal visible matter had decoupled from the photons, at the → recombination era (380,000 years after the Big Bang), it collapsed onto these dark matter clumps. In this way, the dark matter clumps acted as seeds for galaxy formation.

cold; → dark; → matter; → theory.

ceasefire
  آتش‌بس   
âtašbas (#)

Fr.: cessez-le-feu   

An often temporary cessation of hostilities during wartime for a specific purpose. It may be unilateral or bilateral.

From cease from O.Fr. cesser "to come to an end, stop," from L. cessare "to cease, go slow, be idle," + → fire.

Âtašbas, from âtaš, → fire, + bas, from bas kardan "to stop, end; leave."

<< < -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 > >>