An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 952

Fr.: animer   

1) To give life to; make alive; make lively or vigorous; give motion to.
2) To give an image or cartoon character the appearance of movement using animation techniques.

From L. animatus p.p. of animare "give breath to," also "to endow with a particular spirit, to give courage to," from anima "life, breath"  L. animus "soul, spirit," anima "breeze, breath, soul;" Goth. uz-anan "to exhale;" Gk. anemos "wind;" PIE root *ane- "to blow, to breathe;" cognate with Pers. jân "vital spirit, soul, mind," as below.

Farhanidan, from far- perfection prefix + han variant of jân "vital spirit, soul;" hen o hen "to pant;" Lori, Kurd., henâs, henâsa "breath," henowša "panting;" Mid.Pers. (+ prefix *ui-) gyân "(breathing) soul," gyânig "spiritual, vital;" Av. viiānayā "spirit(ness);" Proto-Iranian *HanH- "to breathe" cf. Skt. ani- "to breathe," aniti "breathes;" Gk. and L., as above, + -idan infinitive suffix.


Fr.: animation   

1) An act or instance of animating or enlivening; the state or condition of being animated.
2) The technique of imaging successive drawings or positions of cartoons to create an illusion of movement when the film is shown as a sequence.

animate; → -tion.

ânion (#)

Fr.: anion   

A → negatively charged → ion or → radical. Anions in a liquid subjected to electric potential are attracted toward the → anode. See also → cation.

From Gk. anienai "to go up," from an-, from → ana- "up," + -i-, from ire, eo "to go, walk," cf. Pers. ây-, → assembly, + -on, as in → ion.

  انیزوبیراهی، انیزوبیراهمندی   
anizobirâhi, anizobirâhmandi

Fr.: anisoplanatisme   

In an imaging system, the dependence of its performance on field angle. In other words, the spatial variability of the → point spread function for off-axis sources.

an- + → isoplanatism.


Fr.: anisoplanicité   

The departure from → isoplanicity.

an-; → isoplanicity.


Fr.: anisotrope   

Describing a medium in which certain physical properties are different in different directions.

anisotropy; → -ic.

anisotropic homogeneous cosmological model
  مدل ِ کیهانشناختی ِ همگن و نا-ایزوگرد   
model-e keyhânšenâxti-ye hamgen o nâ-izogard

Fr.: modèle cosmiologique homogène mais anisotrope   

A solution to Einstein's theory of → general relativity that is spatially homogeneous but allows for rotation and/or shear. See also → Bianchi cosmological model.

anisotropic; → homogeneous; → cosmological; → model.

  ناهمسانگردی، نا-ایزوگردی   
nâhamsângardi, nâ-izogardi

Fr.: anisotropie   

A variation in a property with direction, e.g. → cosmic microwave background anisotropy, → dipole anisotropy.

From → an-, privative prefix, + → isotropy.

quzak (#)

Fr.: cheville   

1) (in humans) The joint between the foot and the leg, in which movement occurs in two planes.
2) The corresponding joint in a quadruped or bird; hock (

M.E. ankel, enkel, cognate with M.L.G., Du. enkel, O.H.G. anchal, enchil, O.Norse okkul.

Quzak, from quz, variant of kuž "humped," → convex.

nâbudi (#)

Fr.: annihilation   

The process in which the entire → mass of → two colliding → particles, one of → matter and one of → antimatter, is → converted into → radiant energy in the form of → gamma rays. See also → annihilation operator.

L. annihilatus, p.p. of annihilare "to reduce to nothing," from ad- "to" + nihil "nothing," from ne- "not" + hilum "small thing, trifle"

Nâbudi, from nâ- "not" + bud "to be, exist," from budan "to be, exist" + -i noun forming suffix.

annihilation operator
  آپارگر ِ نابودی   
âpârgar-e nâbudi

Fr.: opérateur d'annihilation   

In → quantum field theory, the operator that lowers → eigenstates one → energy level, contrarily to the → creation operator.

annihilation; → operator.


Fr.: annoncer   

To make known publicly or officially; proclaim; give notice of (

M.E., from M.Fr. anoncer, O.Fr. anoncier "announce, proclaim," from L. annuntiare, adnuntiare "to announce, relate," literally "to bring news," from → ad- "to" + nuntiare "relate, report," from nuntius "messenger."

žâyidan, from prefix â- + Sogd., Munji žây- "to speak, to say," Yaghnobi žoy- "to read, sing," Yazghulami γay- "to call," Pers. (prefixed) afqân "lamentation, groaning;" Av. gā- "to sing," pairi.gā.vacah- "who sings the words around," bərəzi.gāθra- "singing high," gāθə- "song, gāthā;" cf. Skt. gā- "to sing;" O.Russ. gajati "to croak (ravens)"; Lith. giedoti "to sing" (Cheung 2007).


Fr.: annuel   

Covering the period of a year; occurring or happening every year or once a year.

Annual, from M.Fr. annuel, from L.L. annualis, blend of L. annuus "yearly," from annus "year" and L. annalis "yearly," from annus "year," from PIE *atnos, from *at- "to go" (Skt. a'tati "he goes, wanders").

Sâlâné, from sâl, → year, + âné "-ly".

annual aberration
  بیراهش ِ سالانه   
birâheš-e sâlâné

Fr.: aberration annuelle   

The apparent, small displacement in position of a star during the year due to the → aberration of starlight. It depends on the → celestial latitude, and its maximum value is about 20''.50. See also → constant of aberration; → aberration orbit.

annual; → aberration.

annual apparent motion
  جنبش ِ سالانه‌ی ِ پدیدار   
jonbeš-e sâlâne-ye padidâr

Fr.: mouvement annuel apparent   

annual motion.

annual; → apparent; → motion.

annual equation
  هموگش ِ سالانه   
hamugeš-e sâlâné

Fr.: équation annuelle   

An irregularity in the Moon's orbit, which can amount to 11 degrees in a period of one year. It results from the Sun's disturbing effect on the motion of the Moon due to varying distance between them.

annual; → equation.

annual motion
  جنبش ِ سالانه   
jonbeš-e sâlâné

Fr.: mouvement annuel   

The annual apparent motion of the → Sun in the sky with respect to → fixed stars along the path called → ecliptic. The apparent annual motion is due to the → Earth's → revolution about the Sun. In the course of this motion, the Sun appears to shifts about 1° eastward per day.

annual; → motion.

annual parallax
  دیدگشت ِ سالانه   
didgašt-e sâlâné

Fr.: parallaxe annuelle   

The difference in position of a star as seen from the → Earth and → Sun, i.e. the angle subtended at a star by the mean → radius of the Earth's orbit around the Sun. Same as → heliocentric parallax. Because the Earth revolves around the Sun, we observe the sky from a constantly moving position in space. Therefore, we should expect to see an annual effect, in which the positions of nearby objects appear to oscillate back and forth in response to our motion around the Sun. This does in fact happen, but the distances to even the nearest stars are so great that we need to make careful observations with a telescope to detect it. The annual parallax of the nearest star, → Proxima Centauri, is 0.762 arcsec, which is too small for our → acuity of vision.

annual; → parallax.

annual variation
  ورتش ِ سالانه   
varteš-e sâlâné

Fr.: variation annuelle   

Generally, the variation of a quantity over a year. In particular the yearly change in the right ascension or declination of a star, produced by the combined effects of the precession of the equinoxes and the proper motion of the star.

annual; → variation.


Fr.: annuler   

(Especially of laws or other established rules, usages, etc.) to make void or null; abolish; cancel; invalidate (

M.E., from O.Fr. anuller, from L.L. annullare "to make to nothing," from L. → ad- "to" + nullum, neuter of nullus "nothing," → null.

Ânulidan, from prefix â- + nul, → null, + -idan infinitive suffix.

<< < -ab ab- abo abs abs acc acc aco act ad add adj aeo afo agr Alf alg Alk Aln Alp alt amb ana anc ang ani ann Ant ant Ant apl apo app Aqu arc arg arr asc ass ast ast asy atm ato att aut aut axi > >>