An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 1327
rustâ (#)

Fr.: campagne   

A rural area; he inhabitants of a countryside.

country; → side.

Rustâ, from Mid.Pers. rôstâk, rôtastâk "village, district, river-bed;" loaned into Armenian rotstak, ərotastak "district."

  ۱) جفت، ۲) جفت‌نیرو؛ ۳) جفتیدن، جفسر کردن   
1) joft (#), 2) joftniru (#); 3) joftidan (#), jafsar kardan

Fr.: 1, 2) couple; 3) coupler   

1) General: Two items of the same kind; a pair; something that joins or connects two things together; a link.
2) A system of two equal and opposite, parallel, but not → collinear forces acting upon a body.
3) To fasten, join together; connect. See also → coupled, → coupled system, → charge-coupled device, → coupling, → decouple, → galvanic couple, → Nasireddin couple, → pair; → parity, → thermocouple.

1) joft "pair, couple," Lori, Laki jeft, Qâyeni jof, Tabari jeft, Mid.Pers. yuxt "pair, couple," Av. yuxta- "a team of horses," from yaog- "to yoke, harness, put to; to join, unite," infinitive yuxta, Mid.Pers. jug, ayoxtan "to join, yoke," Mod.Pers. yuq "yoke," cf. Skt. yugam "yoke," Gk. zygon "yoke," zeugnyanai "to join, unite," L. jugare "to join," from jugum "yoke," P.Gmc. *yukam, E. yoke; PIE *yeug- "to join."
2) joftniru, from joft as above + niru, → force.
3) Joftidan, infinitive from joft, → couple; jafsar kardan infinitive from jafsar, → coupled, + kardan "to do, to make."

  جفسر، جفتیده   
jafsar, joftidé

Fr.: couplé   

Joined together, connected by a link. → coupled system, → charge-coupled device.

Adj. from → couple.

Jafsar "connected, joined pair," in Tâleši, from jaf, variant of joft, as above + sar "head," literally "joined by head" (Mid.Pers. sar, Av. sarah- "head," Skt. siras- "head," Gk. kara "head," keras "horn," Mod.Pers. sarun "horn," L. cerebrum "brain;" PIE *ker- "head, horn"); joftidé adj./p.p. from joftidan, → couple.

coupled systems
  راژمان‌های ِ جفسر، ~ جفتیده   
râžmânhâ-ye jafsar, ~ joftidé

Fr.: systèmes couplés   

A set of two or more mechanical vibrating systems connected so that they interact with one another.

coupled; → system;

  جفسری، جفتش   
jafsari, jofteš

Fr.: couplage   

The act of linking together or forming couples; a connection between two things so they move together.
The quality of coupled systems or the way they are coupled.

Noun from → couple; → -ing.

coupling coefficient
  همگر ِ جفسری   
hamgar-e jafsari

Fr.: coefficient de couplage   

A parameter that indicates the strength of the interaction between two systems.

coupling; → coefficient.

coupling constant
  پایای ِ جفسری   
pâyâ-ye jafsari

Fr.: constante de couplage   

In nuclear physics, a constant that indicates a measure of how strongly two particles interact.

coupling; → constant.

  پردلی، دلیری، درش   
pordeli (#), deliri (#), darš

Fr.: courage   

The quality of mind or spirit that enables a person to face difficulty, danger, pain, etc.

M.E. corage, from O.Fr., derivative of cœur "heart," from L. cor, cognate with Pers. del and E. → heart

Pordeli, deliri, from pordel, delir, → courageous.
Darš, → dare.

  پردل، دلیر، درشمند   
pordel (#), delir (#), daršmand

Fr.: courageux   

Having or characterized by courage.

M.E., from O.Fr. corageus, corajos, from → courage.

Pordel, literally "greathearted," from por, → full, + del, → heart. Delir "brave, courageous," from del "heart," as above.
Daršmand, → daring.


Fr.: cousin   

1) The son or daughter of an uncle or aunt.
2) One related by descent in a diverging line from a known common ancestor, as from one's grandparent or from one's father's or mother's sister or brother (

M.E. cosin, from O.Fr. cusin, cosin, from L. consobrinus, from → com- + sobrinussoror, → sister.

Tarzâ, from tar, from Baluci teru "uncle, aunt," tri "aunt;" cf. Av. tuiriia- "uncle," + "son/daughter of; born," → birth.

  هم ارزایی   

Fr.: covalence   

Chemistry: The number of covalent bonds which an atom can from. The sharing of electrons to form chemical bonds. → equivalence.

From → co- + valence, from L. valentia "strength, worth," valere "to be worth; be strong."

Ham-arzâyi, from ham-co- + arzâyi, from arzidan "to be worth," arzân "worthy; of small value, cheap," arj "esteem, honour, price, worth," Mid.Pers. arz "value, worth," arzidan "be worth," arzân "valuable;" Av. arəjaiti "is worth," arəja- "valuable," arəg- "to be worth;" cf. Skt. arh- "to be worth, to earn," árhant- "worthy person;" Gk. alphanein "to bring in as profit," alphein "to ear, obtain;" Lith. algà "salary, pay;" PIE base *algwh- "to earn; price, value."

covalent bond
  بند ِ هم ارزا   
band-e ham-arzâ

Fr.: lien covalent   

A chemical bond between two atoms of the same or different elements, in which each atom contributes one electron to be shared in a pair.

Covalent, adj. of → covalence; → bond.


Fr.: covariance   

In statistics, a measure of linear dependence. For two random variables X and Y with expectations mx and my, the covariance is E{(X - mx)(Y - my)}.

From co-, → com-, + → variance.

From ham-, → com-, + vartâyi, → variance.


Fr.: covariant   

In physics, having the property of remaining invariant in form under a Lorentz transformation.

com-; → variance.

covariant tensor
  تانسر ِ هم‌ورتا   
tânsor-e hamvartâ

Fr.: tenseur covariant   

A tensor whose components are distinguished by → subscript indices.

covariant; → tensor.

  پوشیدن؛ پوشش   
pušidan; pušeš (#)

Fr.: couvrir; couverture   

1) To spread over an area or surface.
2) Something that covers.

From M.E., from O.Fr. covrir, from L. cooperire "to cover over, overwhelm, bury," from the intensive prefix → com- + operire "to close, cover."

Pušidan "to cover; to put on," → envelope; pušeš, verbal noun of pušidan.

pušeš (#)

Fr.: couverture   

1) General: The extent to which something is covered.
2) Astro.: The total area of the sky observed in a particular → sky survey. See also → fractional sky coverage.
3) The area within which a radio signal sent by a transmitter is received reliably .
4) In film making, the shooting of a scene from various views and using various exposures.

From → cover + -age a suffix forming abstract nouns.


gâv (#)

Fr.: vache   

The female of bovine animals.

M.E. cou, cognate with Pers. Gâv, as below.

Mid.Pers. "bull, cow;" Av. gao-, gāvuš; cf. Skt. go-, gáus; Gk. bous ";" L. bos "ox, bull, cow;" O.E. cu "cow;" Ger. Kuh "cow;" PIE *gwows "cow."

Cowling model
  مدل ِ کاؤلینگ   
model-e Cowling

Fr.: modèle de Cowling   

A model of the internal structure of → massive stars in which a → convective core is surrounded by a large → radiative envelope. However, recent studies point to the presence of a thin → convection zone in the outer envelope of hot massive stars, beneath the → photosphere, which is caused by opacity peaks associated with iron and helium ionization. See also → iron convection zone.

After Thomas Cowling (1906-1990), a British astronomer, who put forward the model; → model.

CP star
  ستاره‌ی ِ CP   
setâre-ye CP

Fr.: étoile CP   

chemically peculiar star.

chemically peculiar star.

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