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
submission
  درسپرد   
dar-sepord

Fr.: soumission   

An act or instance of submitting. The condition of having submitted. → submit

Verbal noun of → submit.

submit
  درسپردن   
dar-sepordan

Fr.: soumettre   

To present for the approval, consideration, or decision of another or others. For example, to submit a research paper for publication, to submit an observing proposal.

From L. submittere "to yield, lower, let down, put under, reduce," from → sub- "under" + mittere "to let go, send."

Dar sepordan, dar sepârdan "to yield, surrender, give in," from dar "in, into" (→ in-) + sepordan/sepârdan "to give in charge, entrust to, deposit with;" ultimately Proto-Iranian *spar- "to hand over, entrust."

subproof
  زیر‌آوین   
zirâvin

Fr.: sous preuve   

A proof that occurs within the context of a larger proof

sub-; → proof.

subrelativistic
  زیر-بازانیگی‌مند   
zir-bazânigimand

Fr.: subrelativiste   

Describing a system or situation for which the → Lorentz factor, γ, is much smaller than 1. See also → ultrarelativistic.

ultra- + → relativistic

subscribe
  زیر-وشتن، زیر-ویسیدن   
zirveštan, zirvisidan

Fr.: souscrire   

1) To pledge, as by signing an agreement, to give or pay (a sum of money) as a contribution, gift, or investment.
2) To obtain or have a subscription to a publication, concert series, service, etc.
3) To give one's consent.
4) To sign one's name to a document (Dictionary.com).

sub- + scribe, → inscribe.

Zirveštan, from zir-, → sub-, + veštan, visidan, → inscribe.

subscript
  زیرنوشت   
zirnevešt (#)

Fr.: indice inférieur   

1) Math.: An → index (a digit or symbol) written under and to the right of a letter for representing terms in a → sequence or → series, or indicating variable components in → tensor analysis. → superscript.
2) Chemistry: Such a number occurring in a chemical formula.

From L. subscriptus, p.p. of subscribere "to write underneath," from → sub- "underneath" + scribere "to write," → describe.

Zirnevešt, from zir-, → sub-, + nevešt "written," from neveštan, nevis- "to write;" Mid.Pers. nibištan, nibes- "to write;" Av./O.Pers. nī- "down; in, into," → ni- (PIE), + paēs- "to paint; to adorn," paēsa- "adornment" (Mid.Pers. pēsīdan "to adorn"); O.Pers. pais- "to adorn, cut, engrave" (Mod.Pers. pisé "variegated"); cf. Skt. piśáti "adorns; cuts;" Gk. poikilos "multicolored;" L. pingit "embroiders, paints;" O.C.S. pisati "to write;" O.H.G. fēh "multicolored;" Lith. piēšti "to draw, adorn;" PIE base *peik- "colored, speckled."

subscription
  زیر-وشت   
zirvešt

Fr.: souscription   

1) A sum of money given or pledged as a contribution, payment, investment, etc. 2) The right to receive a periodical for a sum paid, usually for an agreed number of issues (Dictionary.com).

subscribe; → -tion.

subset
  زیر-هنگرد   
zir-hangard

Fr.: sous-ensemble   

A set of elements wholly contained in another set. If each element of a set A belongs to a set B, A is called a subset of B, written A ⊂ B or B ⊃ A and read "A is contained in B" or "B contains A" respectively.

sub- + → set.

subshell
  زیر-پوسته   
zir-pusté

Fr.: sous couche   

A set of electrons with the same angular momentum quantum number, denote l. The number of electrons permitted in a subshell is equal to 2l + 1.

sub- + → shell.

subsolar point
  نقطه‌ی ِ زیر-خورشیدی   
noqte-ye zir-xoršidi

Fr.: point subsolaire   

The point of the surface of a celestial body (including the Earth) at which the Sun is directly overhead at a particular time.

sub-; → solar; → point.

subsonic
  زیر-صدایی   
zir-sedâyi

Fr.: subsonique   

Describing a speed that is less than the speed of sound in the medium concerned. → supersonic.

sub-; → sonic.

subsonic flow
  تچان ِ زیر-صدایی   
tacân-e zir-sedâyi

Fr.: écoulement subsonique   

A flow in which the velocity of the constituting particles never exceeds that of sound in the same fluid. Also called subcritical flow.

subsonic; → flow.

substance
  زیریست   
zirist

Fr.: substance   

1) That of which a thing consists; physical matter or material.
2) Physics: A species of matter, commonly homogeneous, that occurs in macroscopic amounts.
3) Philo.: That by virtue of which a thing has its determinate nature, which makes it what it is, as distinguished from something else.

M.E., from O.Fr. substance, from L. substantia "being, essence, material," from substans, pr.p. of substare "to stand under or be present," from → sub- "up to, under" + stare "to stand," cognate with Pers. istâdan "to stand," as below.

Zirist, literally "to stand under," from zir-, → sub-, + ist "to stand; to be standing, "from istâdan "to stand;" Mid.Pers. êstâtan; O.Pers./Av. sta- "to stand, stand still; set;" Av. hištaiti; cf. Skt. sthâ- "to stand;" Gk. histemi "put, place, weigh," stasis "a standing still;" L. stare "to stand;" Lith. statau "place;" Goth. standan; PIE base *sta- "to stand."

substantive
  زیریستین   
ziristin

Fr.: substantif   

Grammar: A word or word group functioning syntactically as a noun. Substantives include nouns and → nominals.

M.E., from L.L. substantivus "of substance or being," from L. substantia "being, essence, material," → substance, contraction of "noun substantive" from L. nomen substantivum ("independent noun") as opposed to nomen adiectivum "noun adjective" ("dependent noun").

Ziristin, from zirist, → substance, + -in a suffix of relation.

substellar
  زیر-ستاره‌ای   
zir-setâre-yi

Fr.: sous-stellaire   

1) Pertaining to a class of objects with a mass less than 8 percent that of the Sun.
2) → substellar point.

sub- + → stellar.

substellar limit
  حدّ ِ زیر-ستاره‌ای   
hadd-e zir-setâre-yi

Fr.: limite sous-stellaire   

The mass limit below which → hydrogen fusion cannot take place, and the cloud collapse cannot lead to the formation of a star. The limit is 0.075 → solar masses, corresponding to about 80 Jupiter masses.

substellar; → limit.

substellar object
  بر‌آخت ِ زیر-ستاره‌ای   
bart-e zir-setâre-yi

Fr.: objet sous-stellaire   

An object with a mass too small to sustain the → proton-proton chain and thus become a true star. See → brown dwarf.

substellar; → object.

substellar point
  نقطه‌ی ِ زیر-ستاره‌ای   
noqte-ye zir-setâre-yi

Fr.: point substellaire   

The point on the Earth, or other body, at which a particular star is directly overhead at a given time.

substellar; → point.

substellarity
  زیر-ستارگی   
zir-setâregi

Fr.: nature sous-stellaire   

The fact or condition, for an object, of not being capable to sustain the → hydrogen fusion because of its low mass (less than 0.08 → solar masses).

substellar + → -ity.

subsystem
  زیر-راژمان   
zir-râžmân

Fr.: sous-système   

A coherent component of a larger system.

sub-; → system


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