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 : far
accusation
  مارزش   
mârzeš

Fr.: accusation   

A charge or claim that someone has done something illegal or wrong; the action or process of accusing someone (OxfordDictionaries.com).

accuse; → -tion.

accusative
  ۱) کنداری؛ ۲) مارزشدار، مارزشمند   
1) kondâri; 2) mârzešdâr, mârzešmand

Fr.: accusatif   

1) → accusative case.
2) → accusatory.

M.E., from M.Fr., from L. accusativus, from ac-, → ad-, + -cusativus, combining form of causativus, → causative, a loan-translation of Gk. aitiatike, in the sense of pointing to the origin or cause, accusing.

1) Kondâri, i.e. → objective case.
2) → accusatory.

accusative case
  کاته‌ی ِ کنداری   
kâte-ye kondâri

Fr.: accusatif   

The → grammatical case of a noun in some languages (such as Greek, Latin, G erman, Russian, Old Persian, Avestan, or Sanskrit), which shows that the noun is the → direct object of a → verb or a → preposition.

accusative; → case.

accusatory
  مارزشدار، مارزشمند   
mârzešdâr, mârzešmand

Fr.: accusatoire   

Containing an accusation; accusing (Dictionary.com).

accuse; → -tion.

accuse
  مارزیدن   
mârzidan

Fr.: accuser   

To charge with the fault, offense, or crime (Dictionary.com).

M.E. ac(c)usen, from O.Fr. acuser "to accuse, indict, blame," earlier "announce, report, disclose," from L. accusare "to call to account," from → ad- "to, toward, at, with regard to" + causari "give as a cause or motive," from causa "reason," → cause.

Mârzidan, from (Lâr, Gerâsh) mârz, (Farâmarzân) morz "blame, reproach, accusation," maybe ultimately from Proto-Ir. *marc- "to destroy, damage;" cf. Av. mərənc- "to destroy," (+ *para-) "to damage, injure," (+ *ui-) "to ruin, spoil;" Mid.Pers. mwlncyn- / murnjên- "to destroy;" Khotanese mulch- "to cause to miscarry" (Cheung 2007).

accused
  مارزیده   
mârzidé

Fr.: accusé   

A person or persons charged in a court of law with a crime, offense, etc.

accuse; → -tion.

accuser
  مارزنده   
mârzandé

Fr.: accusateur   

A person who accuses, especially in a court of law.

accuse; → -tion.

Achernar (Alpha Eridani)
  آخر ِ نهر، رودپایان   
Âxer-e nahr (#), Rudpâyân

Fr.: Achernar   

The brightest star in the constellation → Eridanus. A → subgiant of → spectral type B5; apparent visual magnitude 0.5, about 140 → light-years distant (other names: HR 472, HD 10144). Recent interferometric observations show it to have a flattened shape imposed by fast rotation.

Achernar, from Ar. Axir an-Nahr "end of the river," from axir "end" + nahr "river".

Âxer-e nahr, from Axir an-Nahr.
Rudpâyân "river's end," from rud "river," → Eridanus, + pâyân "end".

achondrite
  اکوندریت   
akondrit

Fr.: achondrite   

A class of → stony meteorites that lack → chondrules. They are made of rock that has crystallized from a molten state. Achondrites are relatively rare, accounting for about 8% of all meteorite falls.

Achondrite, from Gk. prefix a- (an- before stems beginning with a vowel or h) "not, without, lacking" + Gk. chondrite, from chondr-, from chondros "grain," + affix -ite.

achromatic
  افام، بیفام   
afâm (#), bifâm (#)

Fr.: achromatique   

Of or relating to an optical system which is capable of transmitting light without decomposing it into constituent colors.

a-; → chromatic.

achromatic lens
  عدسی ِ افام، ~ بیفام   
adasi-ye afâm, ~ bifâm

Fr.: lentille achromatique   

Lens (or combination of lenses) that brings different wavelengths within a ray of light to a single focus, thus overcoming chromatic aberration.

achromatic; → lens.

acid
  اسید   
asid (#)

Fr.: acide   

A substance that releases hydrogen ions to form a solution with a pH of less than 7, reacts with a base to form a salt, and turns blue litmus red.

From Fr. acide, from L. acidus "sour," adj. of state from acere "to be sour," acer "sharp, pungent, bitter;" from PIE base *ak- "sharp, pointed."

acidic
  اسیدی   
asidi (#)

Fr.: acide   

Being or containing an acid; of a solution having an excess of hydrogen atoms (having a → pH of less than 7).

acid; → -ic.

acknowledge
  آدانیدن   
âdânidan

Fr.: reconnaître   

1) To admit to be real or true; recognize the existence, truth, or fact of.
2) To recognize the authority, validity, or claims of.
3) To show or express appreciation or gratitude for (Dictionary.com).

A blend of M.E aknow "admit or show one's knowledge" (from O.E. oncnawan "understand") and M.E. knowlechen "to admit."

Âdânidan, from âdân, from prefix â- + dân present stem of dânestan, → know; cf. Sogd. âzân, azân "to acknowledge, to confess," from prefixed zân, variant of dân.

acknowledgment
  ۱، ۲) آدانش؛ ۲) سپاسگزاری   
1, 2) âdâneš 2) sepâsgozâri

Fr.: 1) reconnaissance, aveu; 2) remerciement   

1) Recognition of the existence or truth of something.
2) An expression of appreciation (Dictionary.com).

acknowledge; → -ment.

acoustic
  صدایی، صداییک   
sedâyi, sedâyik

Fr.: acoustique   

Pertaining to the sense of hearing, or to → sound waves.

acoustics.

acoustic peak
  ستیغ ِ صداییک   
setiq-e sedâyik

Fr.: pic acoustique   

One of several peaks appearing in the → CMB angular power spectrum of the → cosmic microwave background radiation which are ripples left by acoustic oscillations of the plasma-radiation fluid in the early Universe (→ baryon acoustic oscillations). When the Universe was small and very hot, the free electron density was so high that photons could not propagate freely without being scattered by electrons. Ionized matter, electrons and radiation formed a single fluid, with the inertia provided by the baryons and the radiation pressure given by the photons.

acoustic; → peak.

acoustic pressure
  فشار ِ صدا   
fešâr-e sedâ

Fr.: pression acoustique   

Same as → sound pressure.

acoustic; → pressure.

acoustic wave
  موج ِ صدایی   
mowj-e sedâyi

Fr.: onde acoustique, ~ sonore   

A type of → longitudinal wave that consists of mechanical → vibrations of small → amplitude propagated in an → elastic medium. Acoustic waves exhibit phenomena like → diffraction, → reflection, and → interference, but not → polarization. Also called → sonic and → sound waves. See also → acoustic wave equation. The branch of physics concerned with the properties of sonic waves is called → acoustics.

acoustic; → wave.

acoustic wave equation
  هموگش ِ موج ِ صدایی   
hamugeš-e mowj-e sedâyi

Fr.: équation de l'onde acoustique   

A → differential equation that describes the time evolution of the → scalar potential of the field φ. It is expressed by: ∇2φ = (1/c2)∂2φ/∂t2, where c is → velocity of → longitudinal waves and ∇2 is the → Laplacian operator.

acoustic; → wave; → equation.


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