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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 968
align a telescope
  آختیدن ِ دوربین، ~ تلسکوپ   
âxatidan-e durbin, ~ teleskop

Fr.: aligner un télescope   

Setting the axis of a telescope parallel to prime directions. In equatorial mounting, they are made parallel with the Earth's axis of rotation and the equator respectively. → collimation.

align; → telescope.

aligned
  آختیده   
âxatidé

Fr.: aligné   

Arranged in a → straight line.

Past participle of → align.

aligned magnetic field
  میدان ِ مغناطیسی ِ آختیده   
meydân-e meqnâtisi-ye âxatidé

Fr.: champ magnétique aligné   

A magnetic field whose lines of force are oriented along a particular direction or by a particular manner (axially, vertically; randomly, properly, etc.)

aligned; → magnetic field.

alignment
  آختش، آخطش   
âxateš

Fr.: alignement   

The fact of being in line or bringing into line.

Verbal noun of → align; → -ment.

Alioth (ε Ursae Majoris)
  جون   
Jown (#)

Fr.: Alioth   

The brightest of the seven stars that make up the → Big Dipper → asterism. Alioth shines at magnitude +1.77 from a distance of about 80 → light-years. It is a white star of → spectral type A0pCr. The spectrum of the star is characterized by abnormally strong lines of → chromium and → europium.

Alioth, from Aliot, from Ar. Alyat (الیه) "tail, buttocks".

Jown, from Ar. Jawn "black camel or horse".

Alkaid (η Ursae Majoris)
  قاعد   
Qâed (#)

Fr.: Alkaïd   

The second brightest star in → Ursa Major and the end star in the handle of the → Big Dipper. Alkaid is a blue B3V main sequence star of apparent magnitude of 1.86 and lies at about 100 → light-years.

Alkaid "leader, chief," from Al-Qa'id al-Banat an-Na'ash "the leader of the daughters of the bier," from Banat "daughters" + Na'ash "bier". Banat an-Na'ash is the Ar. name of the constellation.

Qâed from Ar. Al-Qa'id.

alkali
  قلیا   
qalyâ (#)

Fr.: alcali   

A substance that dissolves in water to give hydroxide ions. A generic name for → bases.

M.E. alkaly, from M.fr. alcali, M.L. alkali, from Ar. al-qily (القلی) "salt wort," a plant growing in alkaline soils.

Qalyâ, loan from Ar., as above.

alkali line
  خط ِ قلیایی   
xatt-e qalyâyi

Fr.: raie alcaline   

A spectral line produced by an → alkali metal.

alkali; → line.

alkali metal
  فلز ِ قلیایی   
felez-e qalyâyi (#)

Fr.: métal alcalin   

Any of the chemical elements belonging to group A of the → periodic table, which burn vigorously in air; i.e. → lithium, → sodium, → potassium, → rubidium, → cesium, and → francium. Alkali metals have a → valence of one and are softer and less dense than other metals.

alkali; → metal.

alkaline
  قلیایی   
qalyayi (#)

Fr.: alkalin   

Having the properties of an → alkali; having a → pH greater than 7.0.

From alkal(i) + -ine a suffix denoting "of or pertaining to," "of the nature of," "like."

From qalyâ, → alkali, + -yi adj. suffix.

alkaline earth metal
  فلز ِ قلیایی ِ خاکی   
felez-e qalyâyi-ye xâki (#)

Fr.: terre alcaline   

Any of the metallic chemical elements belonging to group 2 of the → periodic table; i.e. → beryllium, → magnesium, → calcium, → strontium, → barium, and → radium. They are not found free in the nature because they are highly reactive.

alkaline; → earth; → metal.

Felez, → metal; qalyâyi, → alkaline; xâki "of or pertaining to soil," from xâk, → soil.

all
  همه   
hamé (#)

Fr.: tout, tous   

The whole quantity or amount.

M.E. al, plural alle; O.E. eall "all, every, entire;" cf. O.Fris., O.H.G. al, O.N. allr, Goth. alls.

Hamé- "all," variant hami "all the time, always;" Mid.Pers. hamâg "all," hamê "all the time, always;" Av. hama- "any;" cf. Skt. sama-"any, every, whichever;" Gk. amo-then "whichever;" Goth. sums "any;" O.N. sumr "any;" O.E. sum "some;" E. some.

all-sky survey
  بردید ِ همه-آسمان   
bardid-e hame-âsmân

Fr.: relevé sur tout le ciel   

A → survey that collects data on the whole sky. For example the infrared → Two Micron All Sky Survey (2MASS) and the X-ray → ROSAT All-Sky Survey.

all; → sky; → survey.

alliance
  همدستی   
hamdasti (#)

Fr.: alliance   

1) The act of allying or state of being allied; the result of this action.
2) A union to advance the common interests of the members.

M.E., from O.Fr. aliance, from al(ier) "to ally," → alloy, + → -ance.

Hamdasti, literally "joining hand," from ham-, → com-, + dast, → hand, + -i noun suffix.

allocate
  تسکیدن   
teskidan

Fr.: allouer   

1) General: To assign or allot for a particular purpose.
2) Computers: To assign an amount of resource (disk, memory, CPU time, etc.) to a defined user.

From M.L. allocate imperative plural of allocare "allocate," from → ad- "to" + locare "to place," from locus "a place."

Teskidan, from tesk "portion, share, part, lot; a tax upon lands, tribute extracted," variants tešk, toxs (kardan) "distribute, divide;" loaned in Ar. tisq, tasq; tasu "a weight of four barley corns; the twenty-forth part of a weight;" Mid.Pers. tasû "the fourth part," loaned in Ar. tassûj, in Syriac tassûgâ "the fourth part; a measure;" ultimately Proto-Ir. *caçû-ka-; cf. Av. caθwarô, catur-, → four.

allocation
  تسک   
tesk

Fr.: allocation   

The act of allocating; the state of being allocated.

Verbal noun of → allocate.

allotrope
  دگروار   
degarvâr (#)

Fr.: allotrope   

One of two or more forms in which a → chemical element occurs, each differing in physical properties; e.g. → diamond and → graphite are allotropes of → carbon.

From allo-, combining form of Gk. allos "other, different;" cf. L. alius "else;" → alias + trope, from Gk. -tropos "a turn, way, manner," from tropein "to turn;" PIE base *trep- "to turn" (cf. L. trepit "he turns").

Degarvâr, from degar "other, another" (Mid.Pers. dit, ditikar "the other, the second;" O.Pers. duvitiya- "second;" Av. daibitya-, bitya- "second;" Skt. dvitiya- "second;" PIE *duitiio- "second") + -vâr denoting "resembling, like;" Mid.Pers. -wâr; Av. -vara, -var; cf. Skt. -vara.

allotropy
  دگروارگی   
degarvâregi (#)

Fr.: allotropie   

A property of certain → chemical elements, as → carbon, → sulfur, and → phosphorus of existing in two or more distinct forms, known as → allotropes.

allotrope.

allowed band
  باند ِ پرزامیده   
bând-e parzâmidé

Fr.: bande permise   

In solid-state physics, the range of energies which electrons can attain in a material.

P.p. of v. allow, from O.Fr. alouer "approve," from L. allaudare , compound of → ad- "to" + laudare "to praise."

Bând, → band; parzâmidé, p.p. of parzâmidan "to send through, permit, allow," from parzâm "permission," from par- "through" + zâm stem of zâmidan, Mid.Pers. zâmenidan "to send, lead;" → permit

alloy
  آلیاژ   
âlyâž (#)

Fr.: alliage   

A material composed of two or more → metals, or of a metal or metals with a non-metal, exhibiting characteristic metallic properties. Some examples: → bronze is an alloy of → copper and → tin, brass is an alloy of → zinc and copper, and → steel is an alloy of → iron and → carbon. Alloys have properties which differ from those of their components. Moreover, different component proportions yield alloys with different properties.

From M.F. aloi, from O.Fr. alei, from aleier "to mix, combine," from L. alligare "to bind up," from → ad- "to" + → ligare "to bind."

Âlyâž, loanword from Fr.

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