An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < -en ear eav ecl edg EHB Ein ela ele ele ele ell emb emi enc eng ent epi equ equ erg est Euc eva evo exc exc exi exp exp ext ext > >>

Number of Results: 634
emissivity
  گسیلندگی   
gosilandegi (#)

Fr.: émissivité   

The ratio of energy radiated by a material to energy radiated by a black body at the same temperature.

emissive + → -ity.

emit
  گسیلیدن   
gosilidan (#)

Fr.: émettre   

To send forth (liquid, light, heat, sound, particles, etc.).

Verb of → emission.

Gosilidan, infinitive of gosil, → emission.

emitter
  گسیلنده   
gosilandé (#)

Fr.: émetteur   

Any device used to emit light, sound, electrons, or the like.

Agent noun of → emit.

emphasis
  براوژ   
barâvaž

Fr.: accentuation, accent   

Special stress laid upon, or importance attached to (Dictionary.com).

From L. emphasis, from Gk. emphasis "significance, implied meaning," from emphainein "to show, indicate," from en "in" + phainein "to show." It developed a sense of "extra stress" laid on a word or words to make the significance clear, or to show their importance.

Barâvaž, present stem of barâvažidan, literally "to speak loudly," from bar- "on, upon, up," → over-, + âvaž variant of âvâz "voice, sound, noise, clamour," cf. Sariqoli awuj "voice, sound," Wakhi awôγ "voice, sound," related to vâž, → word.

emphasize
  براوژیدن   
barâvažidan

Fr.: appuyer sur, insister sur, souligner   

To give → emphasis to; lay stress upon; stress (Dictionary.com).

emphasis + → -ize.

emphatic
  براوژی   
barâvaži

Fr.: énergique, catégorique   

1) Uttered, or to be uttered, with emphasis; strongly expressive.
2) Using emphasis in speech or action (Dictionary.com).

From Gk. emphatikos, variant of emphantikos, from emphainein, → emphasis.

Barâvaži, from barâvaž + -i adj. suffix.

empirical
  آروینی   
ârvini (#)

Fr.: empirique   

Based on the results of → experiment and → observation only, without → theory.

From L. empiricus, from Gk. empeirikos "experienced," from empeiria "experience," from empeiros "skilled," from en- "in" + peira "experiment."

Ârvini, adj. of ârvin "experience, experiment, test," from prefixed Av. vaēn- (Mod.Pers. bin, present stem of didan "to see, look") "to see," aibī-vaēn- "to look, notice;" cf. Parthian Mid.Pers. frwyn- "to foresee," frwyng "foreseeing," frwyngyft "foresight," from Proto-Iranian *fra-uain.

empirical formula
  دیسول ِ آروینی   
disul-e ârvini

Fr.: formule empirique   

1) In physics, a mathematical equation that predicts observed results, but has no known theoretical basis to explain why it works.
2) In chemistry, a simple expression of the relative number of each type of atom in a chemical compound.

empirical; → formula

empirical science
  دانش ِ آروینی   
dâneš-e ârvini

Fr.: science empirique   

A branch of knowledge, including → natural sciences and → social sciences, that is based on observable phenomena and must be capable of being verified by observation.

empirical; → science.

empiricism
  آروین‌باوری، آروین‌گرایی   
ârvin-bâvari, ârvin-geraayi

Fr.: empirisme   

1) Philo.: The doctrine that all → knowledge of matters of fact derives from experience and that the mind is not furnished with a set of concepts in advance of experience.
2) The use of empirical methods (Dictionary.com).

From empiric, → empirical, + → -ism.

empty
  تهی   
tohi (#)

Fr.: vide   

Containing nothing; having none of the usual or appropriate contents (Dictionary.com).

M.E., from O.E. æmettig "vacant, not occupied," from æmetta "a leisure," from æ "not" + -metta, from motan "to have."

Tohi "empty," → void.

empty set
  هنگرد ِ تهی   
hangard-e tohi

Fr.: ensemble vide   

A set containing no → elements.

empty; → set.

empty Universe
  گیتی ِ تهی   
giti-ye tohi

Fr.: Univers vide   

A → cosmological model based on → Einstein's field equations in which the → Universe is devoid of → matter and → radiation. There are two types of empty Universes: the → de Sitter Universe and the → Milne Universe.

empty; → Universe.

Enceladus (Saturn II)
  انکلادوس   
Enkelâdos (#)

Fr.: Encelade   

The eighth of Saturn's known satellites, about 500 km in diameter, it orbits Saturn at a mean distance of 238,000 km with a period of 1.37 days. Enceladus has the highest albedo (> 0.9) of any body in the solar system. Its surface is dominated by clean ice. Discovered by Herschel in 1789.

In Gk. mythology Enceladus was a Titan who battled Athene in their war against the gods. When he fled the battlefield, Athene crushed him beneath the Sicilian Mount Etna.

Enkelâdos, from the original Gk. pronunciation of the name.

Encke gap
  گاف ِ انکه   
gâf-e Enke

Fr.: division de Encke   

A region of decreased brightness within the A ring of Saturn.

In honor of Johann Franz Encke, → Encke's comet. Gap, from O.N. gap "chasm," related to gapa "to gape."

Gâf, variant kâf "split, slit," stem of kâftan, kâvidan "to split; to dig," Mid./Mod.Pers. škâf- škâftan "to split, burst," Proto-Iranian *kap-, *kaf- "to split;" cf. Gk. skaptein "to dig;" L. scabere "to scratch, scrape," P.Gmc. *skabanan (Goth. skaban; Ger. schaben; E. shave). PIE base *(s)kep- "to cut, to scrape, to hack."

Encke's comet
  دنباله دار ِ انکه   
donbâledâr-e Enké (#)

Fr.: comète de Encke   

A faint comet with the shortest known period (about 3.30 years). Its semimajor axis is 2.21 AU and aphelion 4.1 AU. it is the parent body of the Taurids meteor shower. The comet was first observed in 1786 by the French astronomer Pierre Méchain.

Named after the German astronomer Johann Franz Encke (1791-1865), who in 1819 computed its orbit and proved that sightings of apparently different comets in 1786, 1795, 1805, and 1818 were in fact appearances of the same comet. → comet.

encode
  رمزاندن، رمز‌گذاشتن   
ramzândan, ramz gozâštan

Fr.: codage   

To convert (data, information) into another format by → encoding. See also → decode and → encrypt.

From en- "in; into" + → code.

Ramzândan, infinitive from ramz, → code. Ramz gozâštan, from ramz + gozâštan "to place, put," → nomenclature.

encoder
  رمزانشگر   
ramzânešgar

Fr.: encodeur   

An electronic device or software program used to convert (a message, information, data) into a specialized digital format for efficient transmission or transfer.

encode; → -er.

encoding
  رمزانش، رمز‌گذاری   
ramzâneš, ramz gozâri

Fr.: coder   

A process used for transforming data into another format by means of a scheme that is publicly available so that it can easily be reversed. See also → decoding and → encryption.

encode; → -ing.

encounter
  رویارویی   
ruyâruyi (#)

Fr.: rencontre   

General: A meeting, especially one that is unplanned, unexpected, or brief. An often violent meeting; a clash.
Coming across of two bodies (as two stars in a cluster) which results in the deviation from original directions of motion. → close encounter; → strong encounter; → weak encounter.

From O.Fr. encountrer "confront," from encontre "against, counter to," from L.L. incontra "in front of," from L. in- "in" + contra "against."

Ruyâruyi "being face to face," from ru, ruy "face, countenance," variant rox (Mid.Pers. rôy, rôdh "face," Av. raoδa- "growth," in plural "appearance," from raod- "to grow, sprout, shoot," cf. Skt. róha- "rising, height") + euphonic interfix -â- + ruy + noun suffix -i.

<< < -en ear eav ecl edg EHB Ein ela ele ele ele ell emb emi enc eng ent epi equ equ erg est Euc eva evo exc exc exi exp exp ext ext > >>