An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



<< < -ci cal Cal can cap car Cas cat cau cel cen Cer cha cha Cha che chl cir cir cir Cla cli clo clu co- cod coh col col col com com com com com com com com Com con con con con con con con con con con con coo cor Cor cor cos cos cos Cou cou cra cre cro cru cub cur cyc Cyn > >>

Number of Results: 1322
corotation resonance
  باز‌آوایی ِ هم‌چرخش   
bâzâvâyi-ye ham-carxeš

Fr.: résonance de corotation   

That condition of a → galactic disk at an orbital radius in which the → angular velocity of the disk equals the → pattern speed. It is significant that the spiral wave pattern rotates as a rigid body (ΩP = const), whereas the galactic disk rotates differentially (Ω is a function of galactocentric distance r). The distance rC at which the two angular velocities coincide (Ω(rC) = ΩP) is referred to as the → corotation radius. The corotation resonance and its position within the galaxy is one of the fundamental properties of a spiral galaxy.

corotation; → resonance.

  آتش ِ سپنت المو   
âtaš-e sepant Elmo

Fr.: feu de Saint-Elme   

Same as → Saint Elmo's fire.

From Portuguese corpo santo "holy body," from L. corpus sanctum; → corpuscle; → heiligenschein.


Fr.: corpuscule   

A discrete particle, such as a → photon or an → electron. See also → corpuscular radiation, → corpuscular theory of light.

From L. corpusculum, dim. of corpus "body," cf. Av. kehrp-, kərəf- "body, form," Skt. krp- "body, form," O.E. hrif "belly," O.H.G. href "womb, belly, abdomen;" Ger. Körper (originally Korper) is a loan word from L. corpus; PIE *kwrpes, from base *kwrep- "body, form." → -ule.

Karpul, from Mid.Pers. karp "body, form," cognate with L. corpus, as above, + diminutive suffix → -ule.

corpuscular radiation
  تابش ِ کرپولی   
tâbeš-e karpuli

Fr.: rayonnement corpusculaire   

A stream of atomic or subatomic particles.

Corpuscular, adj. from → corpuscle; → radiation.

corpuscular theory of light
  نگره‌ی ِ کرپولی ِ نور   
negare-ye karpuli-ye nur

Fr.: théorie corpusculaire de la lumière   

Newton's theory according to which light is made up of point-like particles without any mass. It failed to explains several phenomena: simultaneous reflection and refraction at a semi-transparent boundary, interference, diffraction and polarization. Moreover, it requested that the speed of light be greater in a denser medium than in a rarer medium; this prediction is contrary to experimental results. In 1924 Louis de Broglie postulated that matter has not only a corpuscular nature but also a wave nature, and subsequent experiments confirmed de Broglie's model.

Corpuscular, adj. from → corpuscle; → theory, → light.

  ۱) ارشا؛ ۲) ارشاییدن   
1) aršâ; 2) aršâyidan

Fr.: 1) correct; 2) corriger   

1) Free from error; conforming to an acknowledged or accepted standard or fact; true or accurate.
2) To remove the errors or mistakes from. → bolometric correction, → correcting plate, → correction, → corrector, → ionization correction factor, → K correction, → Malmquist correction, → Rydberg correction, → wavefront correction.

From L. correctus, p.p. of corrigere "make straight, put right," from → com- intens. prefix + regere "to guide, direct, rule," cf. Av. raz- "to direct, lead," razišta- "straightest, most correct," erezu- "correct, straight," râzayeiti "directs," O.Pers. râs- "to be right, straight, true," râsta- "staright, true," Mod.Pers. râst "right, straight, true," Skt. raj- "to direct, stretch," rjuyant- "walking straight," Gk. orektos "stretched out," Ger. recht, E. right; PIE base *reg- "right, just; to move in a straight line."

1) Aršâ, from Av. arš, ereš, erež "rightly, truly," as in arš.dâta- "rightly made," arš.manah- "whose thinking is right," arš.vacah- "whose speaking is right," erešya- "righteous, just," cf. O.Pers. arta- "law, justice," Skt. rta- "cosmic order," Gk. arti "just," artios "complete;" PIE base ar- "to fit together, join."

Note: For the sake of clarity, we avoid the Persian term dorost because its dominant meaning is "entire, complete, whole, safe, sound," although it means also "accurate, correct." Etymology: Mid.Pers. drust "straight, right, healthy," drôd "health, thriving," Parthian rwd "health, thriving," O.Pers. duruva- "firm, certain, immune," Av. drava- "healthy," Skt. dhruva- "fixed, firm, lasting," druh- "to be firm," Proto-Iranian *druua-.
2) Aršâyidan, verb from aršâ "correct."

correcting plate
  تیغه‌ی ِ ارشاینده، ~ ارشاگر   
tiqe-ye aršâyandé, ~ aršâgar

Fr.: lame correctrice   

A large glass plate placed at the entrance of a Schmidt telescope to correct for spherical aberration over the large field of view.

correct; → plate.


Fr.: correction   

1) The act or process of correcting.
2) A quantity added to a calculated or observed value to obtain the true value.
3) Something that is substituted or proposed for what is wrong or inaccurate.

Noun form of → correct.

  ارشاینده، ~ ارشاگر   
aršâyandé, ~ aršâgar

Fr.: correcteur   

A thin lens-like optical piece which removes certain optical aberrations.

correct + → -or.


Fr.: corréler   

1) To place in or bring into causal or mutual relation.
2) To have a mutual or reciprocal relation.

From co-, → com-, + relate, → relation

Hambâzânidan , from ham-com- + bâzânidanrelate.


Fr.: corrélation   

General: The degree to which two or more attributes or measurements on the same group of elements show a tendency to vary together; the state or relation of being correlated.
Statistics: The strength of the linear dependence between two random variables.

From M.Fr. corrélation, from cor- "together," → com- + → relation.

Hambâzâneš , from ham-com- + bâzânešrelation.

correlation coefficient
  همگر ِ هم‌باز‌آنش   
hamgar-e hambâzâneš

Fr.: coefficient de corrélation   

A number between -1 and 1 which measures the degree to which two variables are linearly related.

correlation; → coefficient.


Fr.: corrélateur   

In radio astronomy a general term for → autocorrelator and → cross-correlator.

correlate + → -or.


Fr.: corrélogramme   

A plot showing a summary of correlation at different periods of time.

Correlo-, from → correlation; → -gram.


Fr.: correspondre   

To be in agreement, harmony, or conformity; to be similar or equivalent in character, quantity, origin, structure, or function.

From O.Fr. Fr. correspondre, from M.L. correspondere from cor-, → com-, + respondere "to answer," → response.

Hampatvâzidan, from ham-, → com-, + patvâz "response" [Mo'in], from Mid.Pers. patvâc "response," Av. paitivak- + -idan infinitive suffix.


Fr.: correspondance   

The act, fact, or state of agreeing or conforming.

Verbal noun from → correspond.

correspondence principle
  پروز ِ همپتوازی   
parvaz-e hampatvâzi

Fr.: principe de correspondance   

The principle first put forward by N. Bohr according to which the behavior of quantum mechanical laws reduce to classical laws in the limit of large quantum numbers.

correspondence; → principle.

Kalâq (#)

Fr.: Corbeau   

The Crow. A small but fairly conspicuous → constellation in the Southern Hemisphere lying south and west of → Virgo and east of → Crater.

L. corvus "raven," Gk. korax "raven," korone "crow," PIE base *qer-, *qor-, imitative of harsh sounds, cf. Pers. kalâq, Skt. kâkola- "raven."

Kalâq, Mid.Pers. warag, varâq "crow," Lori qelâ, Kordi qel, cf. Skt. kâkola- "raven," PIE base *qer-, *qor-, as above.

kosekânt (#)

Fr.: cosecante   

The → secant of the complement of an arc or angle; abbreviation csc. If θ is an → acute angle of a → right triangle, csc θ = → hypotenuse/(opposite side).

co-; → secante.

kosinus (#)

Fr.: cosinus   

A trigonometric function giving the ratio of the side adjacent to a given angle to the hypotenuse.

Mod.L. complementi sinus, → com-; → sine.

<< < -ci cal Cal can cap car Cas cat cau cel cen Cer cha cha Cha che chl cir cir cir Cla cli clo clu co- cod coh col col col com com com com com com com com Com con con con con con con con con con con con coo cor Cor cor cos cos cos Cou cou cra cre cro cru cub cur cyc Cyn > >>