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: 391
optically
  نورانه، نوریکانه   
nurâné, nurikâné

Fr.: optiquement   

Adverb of → optical.

optical + -ly.

Nurâné, from nur, → light, + -âné "-ly;" nurikâné, from nurik, → optical, + -âné "-ly."

optically active
  نورانه ژیرا   
nurâné žirâ

Fr.: optiquement actif   

Relating to → optical activity.

optically; → active.

optically thick
  نورانه ستبر، نوریکانه ~   
nurâné setabr, nurikâné ~

Fr.: optiquement épais   

The qualifier of a medium in which the → optical depth is large, significantly larger than 1.

optically; → thick.

optically thick wind
  باد ِ نورانه ستبر   
bâd-e nurâné setabr

Fr.: vent optiquement épais   

A wind with the → sonic point located at large optical depth for continuum. In particular, → Wolf-Rayet star winds are → optically thick. However, the outer parts of W-R winds are → optically thin for continuum, and in those regions the matter flow is driven by the same mechanism as in the winds of OB stars.

optically; → thick; → wind.

optically thin
  نورانه تنک، نوریکانه ~   
nurâné tonok, nurikâné ~

Fr.: optiquement mince   

The qualifier of a medium in which the → optical depth is large, significantly smaller than 1.

optically; → thin.

optically violent variable (OVV) quasar
  کو‌آسارِ ورتنده‌ی ِ نورانه سورا   
kuâsâr-e vartande-ye nurâné surâ

Fr.: quasar variable optiquement violent   

A member of a small subset of quasars consisting of bright radio galaxies whose flux of visible light output can vary by as much as 50% in a single day.

optically; → violent; → variable; → quasar.

optician
  ۱)عینک‌ساز؛ ۲) نوریکار، نوریک‌کار   
1) eynak-sâz; 2) nurikâr, nurik-kâr

Fr.: opticien   

1) A maker or seller of optical glass.
2) A person specialized in optical instruments.

From Fr. opticien, from M.L. optic(a), → optics, + -ien "-ian."

1) Eynak-sâz "eyeglass maker," from eynakeyeglasses + sâz agent noun of sâxtan, sâzidan "to build, make, fashion; to adapt, adjust, be fit" (from Mid.Pers. sâxtan, sâz-, Manichean Parthian s'c'dn "to prepare, to form;" Av. sak- "to understand, to mark," sâcaya- (causative) "to teach").
2) Nurikâr, nurik-kâr "optics performer, optics workman, optics specialist," from nurik, → optics, + -kâr variants -gar,-gâr, from kar-, kardan "to do, to make" (Mid.Pers. kardan, O.Pers./Av. kar- "to do, make, build," Av. kərənaoiti "makes," cf. Skt. kr- "to do, to make," krnoti "makes," karma "act, deed;" PIE base kwer- "to do, to make").

optics
  نوریک، نورشناسی   
nurik, nuršenâsi

Fr.: optique   

The branch of physics that deals with the properties and phenomena of electromagnetic radiation in the wavelength range extending from the ultraviolet (at about 40 nm) to the far-infrared (at 1 mm) and with vision.

Optics, from optic, from M.Fr. optique, from M.L. opticus "of sight or seeing," from Gk. optikos "of or having to do with sight," from optos "seen, visible," from op-, root of opsesthai "be going to see," related to ops "eye," from PIE *okw- "eye; to see" (→ eye); → -ics.

Nurik, from nur, → light, + -ik-ics. Nuršenâsi, from nur, → light, + šenâsi-logy.

optimal
  بهین   
behin (#)

Fr.: optimal   

One that minimizes or maximizes some quantity or combination of quantities, such as time, energy, distance, path, etc.

Optimal, adj. of → optimum.

optimization
  بهینش، بهین‌سازی   
behineš, behinsâzi

Fr.: optimalisation   

General: The fact of optimizing. The condition of being optimized. → optimize.
Computer science: Improving a system to reduce runtime, bandwidth, memory requirements, or other property of a system.

Verbal noun of → optimize

optimize
  بهینیدن، بهین ساختن   
behinidan, behin sâxtan

Fr.: optimiser   

General: To make as effective, perfect, or useful as possible.
Math.: To determine the maximum or minimum values of a specified function by systematically choosing the values of the variables from within an allowed set.

From opti(mum), → optimum, + → -ize.

Behinidan, from behin, → optimum, + -idan infinitive suffix. Behin sâxtan compound verb from behin + sâxtan, sâzidan "to build, make, fashion; to adapt, adjust, be fit" (from Mid.Pers. sâxtan, sâz-, Manichean Parthian s'c'dn "to prepare, to form;" Av. sak- "to understand, to mark," sâcaya- (causative) "to teach").

optimizer
  بهین‌ساز   
behinsâz

Fr.: optimiseur   

In computer science, a program that optimizes the speed or resource utilization. → optimize.

Agent noun of → optimize.

optimum
  بهینه   
behiné (#)

Fr.: optimum   

The best or most favorable point, degree, amount, etc. The greatest degree or best result obtained or obtainable under specific conditions.

From L. optimum, neuter singular of optimus "best" (used as a suppletive superlative of bonus "good").

Behiné, from behin superlative of beh "good, fine" (Mid.Pers. veh "better, good;" O.Pers. vahav-, vahu-; Av. vah-, vohu- "good;" cf. Skt. vasu- "good;" Hittite wasu-; Gaulish vesus "good") + -in superlative suffix + nuance suffix.

option
  اپتش، گزینه   
opteš, goziné (#)

Fr.: optesh   

1) The power or right of choosing.
2) Something that may be or is chosen; choice.
3) The act of choosing (Dictionary.com).

opt; → -tion.

optional
  اپتشی، گزینه‌ای   
opteši, gozine-yi

Fr.: optesh   

Left to one's choice; not required or mandatory (Dictionary.com).

option; → -al.

optometer
  دیدسنج   
didsanj (#)

Fr.: optomètre   

Any of various instruments for measuring refractive errors of the eye.

From opto- "vision; eye; optis," combining form from Gk. optos "seen, visible," from opsesthai "be going to see," related to ops "eye;" → -meter.

Did, → vision; -sanj, → -meter.

or
  یا   
yâ (#)

Fr.: ou   

A → conjunction word used to indicate alternatives.

M.E., from or, adverb "early, before," from Old Norse ār akin to O.E. ær "early."

, from Mid.Pers. ayâb, aviâp "or;" cf. P.Pers. ada, Av. adā, aδa "then."

orange
  نارنجی   
nârenji (#)

Fr.: orange   

1) A globose berry with a yellowish to reddish-orange rind and a sweet edible pulp.
2) Any of a group of colors that are between red and yellow in hue (Merriam-Webster.com).

M.E., from O.Fr. orange, orenge, from M.L. pomum de orenge, from It. arancia, originally narancia, alteration of Ar. nâranj, from Pers. nârang, from Skt. narangah "orange tree."

Nârenji, from nârenj "orange," as above.

orbit
  مدار   
madâr (#)

Fr.: orbite   

The path followed by a body moving in a gravitational field. For bodies moving under the influence of a centrally directed force, without significant perturbation, the shape of the orbit must be one of the conic section family of curves (circle, ellipse, parabola, or hyperbola).

L. orbita "wheel track, course, circuit."

Madâr, from Ar.

orbit decay
  تباهیِ مدار   
tabâhi-ye madâr

Fr.: déclin d'orbite   

A gradual change in the orbit of a spacecraft caused by aerodynamic drag of a planet's outer atmosphere and other forces.

orbit; → decay.

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