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: 12948 Search : far
mystify
  شاردیدن   
šârdidan

Fr.: mystifier   

1) To confuse, bewilder, or puzzle.
2) To make mysterious or obscure.

From Fr. mystifier, from mysti-, irregular combining form of mystique "mystic" or mystère, "→ mystery" + -fier, → -fy.

myth
  استوره   
osturé (#)

Fr.: mythe   

A traditional or legendary story, usually concerning some being or hero or event, with or without a determinable basis of fact or a natural explanation, especially one that is concerned with deities or demigods and explains some practice, rite, or phenomenon of nature (Dictionary.com).

From Fr. mythe and directly from M.L. mythus, from Gk. mythos "speech, thought, story, speech, account," of unknown origin.

Osturé, from Ar. usturat, from Gk. historia, → history.

n-body problem
  پراسه‌ی ِ n جسم   
parâse-ye n-jesm

Fr.: problème de n-corps   

The mathematical problem of studying the behavior (e.g., velocities, positions) of any number of objects moving under their mutual gravitational attraction for any time in the past or future. Same as the → many-body problem.

body; → problem.

n-type conductivity
  هازندگی ِ گونه‌ی ِ n   
hâzandegi-ye gune-ye n

Fr.: conductivité de type n   

The conductivity in a semiconductor caused by a flow of electrons, whereas p-type conductivity is caused by a flow of holes.

n standing for → negative; → type; → conductivity.

N66
     
N66

Fr.: N66   

The largest and the most luminous → H II region in the → Small Magellanic Cloud, which contains the prominent OB star cluster → NGC 346. N66 has a diameter of about 7 arcmin on the sky corresponding to about 120 pc for a distance of about 60 kpc. Compared with the → Orion Nebula, N66 has an Hα luminosity almost 60 times higher.

Serial number in the Henize (1956) catalog, more precisely designated as LHA 115-N66.

Na I D-line
  خط ِ D ی ِ Na I   
xatt-e D-ye Na I

Fr.: raie D de Na I   

D line.

Na, → sodium; → D line.

Na'ir al-Saif
  نیر‌السیف   
Nayyer alseyf

Fr.: Na'ir al Saif   

Same as → Iota Orionis.

From Ar. Nayyir al-Saif (نیر‌السیف) "the Bright One in the Sword," from nayyir (نیر) "bright" + al-saif (السیف) "sword."

nabla
  نابلا   
nâblâ (#)

Fr.: nabla   

The mathematical symbol for the → del operator.

From Gk. nabla an ancient stringed instrument, triangular in shape and held like a harp, thus of the shape of ∇.

NaCO (NAOS-CONICA)
     

Fr.: NaCO (NAOS-CONICA)   

An → adaptive optics instrument at the → European Southern Observatory (ESO) → Very Large Telescope (VLT) in service since 2001. It provides adaptive optics assisted imaging, imaging polarimetry, and → coronagraphy (only L) in the 1-5 μm range. It consists of two components: NAOS (Nasmyth Adaptive Optics System) and CONICA (COudé Near Infrared CAmera). The adaptive optics system, NAOS, is equipped with both → visible and → infraredwavefront sensors. It contains five → dichroic filters which split the light from the telescope between CONICA and one of the NAOS wavefront sensors. CONICA is the → infrared camera and → spectrometer attached to NAOS and equipped with an Aladdin 1024 × 1024 pixel InSb array detector. It possesses several wheels carrying masks/slits (including focal plane coronagraphic masks), filters, polarizing elements, → grisms and several cameras allowing → diffraction-limited sampling across the full wavelength range.

NaCo, from NAOS (→ Nasmyth, → adaptive; → optics; → system) + CONICA (→ coude; → near-infrared; → camera).

nadir
  پاسو   
pâsu (#)

Fr.: nadir   

The point on the celestial sphere blocked from view by Earth and diametrically opposite to the → zenith (سرسو).

From M.L. nadir, from Ar. nazir "opposite to," contraction of nazir as-samt (نظیر‌السمت), literally "opposite of the zenith," from nazir "opposite" + samt "zenith."

Pâsu, literally "direction of the foot," from "foot, step" (from Mid.Pers. pâd, pây; Khotanese fad; Av. pad- "foot;" cf. Skt. pat; Gk. pos, genitive podos; L. pes, genitive pedis; P.Gmc. *fot; E. foot; Ger. Fuss; Fr. pied; PIE *pod-/*ped-) + su "direction, side" (from Mid.Pers. sôk "direction, side").

nail
  ۱) میخ؛ ۲) ناخن   
1) mix (#); 2) nâxon (#)

Fr.: 1) clou; 2) ongle   

1) A small metal spike with a broadened flat head, driven into wood to join things together or to serve as a hook.
2) A horny covering on the upper surface of the tip of the finger and toe in humans and other primates (OxfordDictionaries.com).

M.E. nail(l), nayl(l), O.E. negel "metal pin," nægl "fingernail;" cf. O.Norse nagl "fingernail," nagli "metal nail;" O.H.G. nagel, M.Du. naghel, Du. nagel, Ger. Nagel "fingernail, small metal spike;" from PIE root *h3nogh- "nail" (source also of Gk. onyx "claw, fingernail;" L. unguis (Fr. ongle, from diminutive L. ungula) "nail, claw;" Pers. nâxon, as below; Lithuanian naga "hoof," nagutis "fingernail."

1) Mix, from Mid.Pers. mêx "peg, nail;" O.Pers. mayūxa- "doorknob;" cf. Skt. mayūkha- "peg for stretching the woof").
2) Nâxon "nail;" Mid.Pers. nâxun "nail;" cf. Skt. nakha-; Russ. noga; E. nail, as above.

naked
  برهنه   
berehné (#)

Fr.: nu   

Not accompanied or supplemented by anything else. → naked eye, → naked singularity, → naked-eye star.

O.E. nacod "nude;" cf. M.Du. naket, Du. naakt, Ger. nackt, cognate with Pers. berehné, as below, , from PIE base *negw-no- "naked."

Berehné, from Mid.Pers. brahnag (with secondary -r-) "naked;" Av. maγna- "naked;" cf. Skt. nagná- "naked;" Gk. gumnos "naked;" L. nudus "naked;" Arm. merk "naked;" Lith. nuogas "naked;"

naked eye
  چشم ِ برهنه   
cašm-e berehné (#)

Fr.: œil nu   

The qualifier of an eye which is not assisted by any optical device, except for eyeglasses. Same as → unaided eye.

naked; → eye.

naked singularity
  تکینی ِ برهنه   
takini-ye berehné (#)

Fr.: singularité nue   

A singularity that is not surrounded by an event horizon. It will therefore be visible and communicable to the outside world.

naked; → singularity.

naked-eye star
  ستاره‌ی ِ چشم ِ برهنه   
setâre-ye cašm-e berehné

Fr.: étoile visible à l'œil nu   

A star visible without a telescope. In principle, stars down to about sixth magnitude are visible to the naked eye under ideal conditions, but this depends on the individual, the location, and the conditions of the observation.

naked; → eye; → star.

name
  نام   
nâm (#)

Fr.: nom   

A word or term by which somebody or something is commonly and distinctively known.

M.E., from O.E. nama; cf. O.H.G. namo, Ger. Name, Du. naam, Goth. namo "name;" cognate with Pers. nâm, as below.

Nâm "name;" Mid.Pers. nâm; O.Pers./Av. nâman-; cf. Skt. nama-; Gk. onoma, onuma; L. nomen; PIE *nomen-.

nano-
  نانو-   
nâno- (#)

Fr.: nano-   

A prefix denoting 10-9.

Combining form of Gk nanos "dwarf."

nanodiamond
  نانو-الماس   
nâno-almâs

Fr.: nano-diamant   

The most stable carbon compound with an average particle size of about 5 → nanometers (50 Å). Nanodiamonds are synthesized by detonation of → T.N.T. and then gathering the soot that remains from the explosion.

nano-; → diamond.

nanodust
  نانو-غبار   
nâno-qobâr

Fr.: nano-poussière   

Dust grains at → nanoscale sizes found in various astrophysical environments, such as → interstellar medium and → interplanetary space of our Solar System.

nano-; → dust.

nanometer
  نانومتر   
nânometr (#)

Fr.: nanomètre   

A unit of length equal to 10-9 m, or 10 Å.

nano-; → meter.

<< < -es -iv -ti 21- A r abe abs abs acc acc acc act act ada adi adu aff age alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg ari art ass ast ast ast atm ato att aur aut axi B r bac Bal Bar Bar Bay bec Ber Bet Bie bij bin bio bis bla bla blu blu bol Bor bou Bra bre bro Bug C-s cal Cam can car Car Cas cat cav cel cen cer Cha cha cha che cho cir cir cir cla clo clo clu coa coe coh col col col com com com com com com com com com con con con con con con con con con con con coo cor cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl dar dat daw de- Deb dec dec dee def deg del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis div dog Dop dou dra dua dus dwa dyn e-m ear ecl eco eff ein Ein elb ele ele ele ele Els emi emp ene enr env epi equ equ Eri est Euc eva evo exc exc exh exo exp exp ext ext f-n Fah fam fau fee Fer fib fil fin fir fix fle flu foc for for for fra fre fre fri fun fuz gal gal gal Gan gau GCN gen geo geo geo geo Gl glo gra gra gra gra gra gre gro GW1 hab hal han HAR haz hea hel hel Hen Her heu Hig Hil hol hop hor hou Hub Hum Hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind ine inf inf inf inh INP ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jos Jun K2 Kep key kin Kol lag lam Lan lar las lav lea leg len lev lig lim lin lin lin lis lob loc log lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal mar mas mas mat max mea mea mee Men mer met met met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxy pal pan par Par par par pas pea Pen per per per per per pet pha pho pho pho phy pie Pit Pla pla pla pla ple Poi pol pol pol pol pop pos pos pow pre pre pre Pre pri pri pri pro pro pro pro pro pro Pro pub pul pyr qua qua qua qua Qui rad rad rad rad rad rad ram ran rat rea rec rec rec red ref ref reg reg rel rel rem rep res res res ret rev rho Rie rim riv rol Ros rot rul S a Sah san Sat sca Sch Sch scr sec sec sec sei sel sem sep set sha she sho sid sig sil sim sin sit sky slu sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spl spr sta sta sta sta sta ste ste sti sto str str sub sub sub sug sun sup sup sup sup sur syl syn sys tal Tay tel ten ter tex the the the thi tho thu tid tim tod top tot tra tra tra tra tri tri tro tru tur twi Typ UFO ult unc uni uni uni upg ura uti val var vec vel ver ver vig vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yel you zer zod > >>