An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 380

Fr.: nourrir   

1) To sustain with food or nutriment; supply with what is necessary for life, health, and growth; feed.
2) To strengthen, build up, or promote (

M.E., from O.Fr. norriss-, stem of norrir "raise, bring up, nurture, foster; maintain, provide for," from L. nutrire "to feed, nurse, foster, support, preserve," from *nutri, older form of nutrix "nurse,") literally "she who gives suck."

Fâridan, from the Fârs province dialects Sivandi fâr- and Xori fôr- "to eat," probably development of Proto-Ir. *hu- "to eat" (Av. xvar-, Pers. xordan, → feed) to f-, also Tajiki furt-, fə- "to gulp, swallow," maybe from a separate root (Cheung 2007).


Fr.: nourriture   

1) Something that nourishes; food, nutriment, or sustenance.
2) The act of nourishing. The state of being nourished (

M.E. norysshement, from M.Fr. norissement, → nourish, → -ment.

Fârmân, noun from fâridan (like sâzmân, sâxtemân, câymân, râžmân, and others).

  نووا، نو‌اختر   
novâ, now-axtar (#)

Fr.: nova   

A star that experiences a sudden increase in → luminosity, by a s much as 106. The → outburst ejects a shell of matter but does not disrupt the star.

Nova, from L. stella nova "new star," from stellastar + nova, fem. of novusnew.

Novâ, from now, → new; now-axtar "new star," from now, as above, + axtar, → astro-.

  نوال، رمان   
novâl, român (#)

Fr.: roman   

A fictitious prose narrative of considerable length and complexity, portraying characters and usually presenting a sequential organization of action and scenes (

From It. novella (storia) "new kind of story," from L. novellus "new, young, recent," → new.

Novâl, from now, → new, + -âl, → -al. Român, from Fr. roman, from V.L. *romanice "in the manner of Romans."


Fr.: 1) bec; 2) tuyère   

1) Tha end part of a → pipe, → hose, or → tube through which a → stream of → fluid is directed.
2) A part in a → rocket → engine that accelerates the exhaust gases from the combustion chamber to a high → velocity.

M.E. noselle, diminutive of → nose.

Kalap "the beak of a bird" (Biruni, at-Tafhim), may be from *galap-, ultimately from Proto-Ir. *ui-lap-; cf. Mid.Pers. lap "lip," Mod.Pers. lab cognate with L. labium, E. lip.

nozzle throat
  گلو‌ی ِ کلپ   
galu-ye kalap

Fr.: col de tuyère   

The portion of a nozzle with the smallest → cross section.

nozzle; → throat.


Fr.: nuance   

1) A subtle difference or distinction in expression, meaning, response, etc.
2) A very slight difference or variation in color or tone (

From Fr. nuance "shade of color, hue," from nuer "to shade," from nue "cloud," from L. nubes "a cloud, mist, vapor," → nebula.

Sâgen, from Xoyini sâgené "shade, shadow," related to sâyé, → shadow.

haste-yi (#)

Fr.: nucléaire   

Of or pertaining to a → nucleus.

From nucle(us), → nucleus, + -ar variant of the adjective-forming suffix → -al.

Haste-yi, from hasté, → nucleus, + -i adjective-forming suffix.

nuclear barrier
  ورغه‌ی ِ هسته‌ای   
varqe-ye haste-yi (#)

Fr.: barrière nucléaire   

The region of high potential energy through which a charged particle must pass on entering or leaving an atomic nucleus. → Gamow barrier.

nuclear; → barrier.

nuclear burning
  سوزش ِ هسته‌ای   
suzeš-e haste-yi

Fr.: combustion nucléaire   

A → nuclear reaction inside a star that produces the energy to make the star shine and also transform chemical elements into others.

nuclear; → burning.

nuclear charge
  بار ِ هسته‌ای   
bâr-e haste-yi (#)

Fr.: charge nucléaire   

The positive electric charge on the nucleus of an atom.

nuclear; → charge.

nuclear combustion
  سوزش ِ هسته‌ای   
suzeš-e haste-yi

Fr.: combustion nucléaire   

nuclear burning.

nuclear; → combustion.

nuclear cross-section
  سکنج‌گاه ِ هسته‌ای   
sekanjgâh-e hasteyi

Fr.: section efficace nucléaire   

Apparent cross-section possessed by an atomic nucleus when it undergoes a particular type of collision process.

nuclear; → cross section.

nuclear density
  چگالی ِ هسته‌ای   
cagâli-ye haste-yi (#)

Fr.: densité nucléaire   

The density of an atomic nucleus (about 1014 g/cm3).

nuclear; → density.

nuclear energy
  کاروژ ِ هسته‌ای   
kâruž-e haste-yi

Fr.: énergie nucléaire   

Energy released during a nuclear reaction as the result of the conversion of mass into energy. → mass-energy equivalence.

nuclear; → energy.

nuclear fission
  شکافت ِ هسته‌ای   
šekâft-e haste-yi (#)

Fr.: fission nucléaire   

A → nuclear reaction in which a heavy atomic nucleus splits into two or more approximately equal parts, usually as the result of the capture of a slow, or → thermal neutron by the nucleus. It is normally accompanied by the emission of further neutrons or → gamma rays and very large amounts of energy. The neutrons can continue the process as a → chain reaction, so that it becomes the source of energy in a → nuclear reactor or an atomic bomb. It may also be a trigger for → nuclear fusion in a hydrogen bomb. Fission occurs spontaneously in nuclei of uranium-235, the main fuel used in nuclear reactors.

nuclear; → fission.

nuclear force
  نیروی ِ هسته‌ای   
niru-ye haste-yi (#)

Fr.: force nucléaire   

The attractive force which acts between nucleons when they are extremely close together (closer than 10-13 cm).

nuclear; → force.

nuclear fuel
  سوخت ِ هسته‌ای   
suxt-e haste-yi (#)

Fr.: combustible nucléaire   

A substance, such as uranium-238 or plutonium-239, which undergoes nuclear fission in a nuclear reactor.

nuclear; → fuel.

nuclear fusion
  ایوش ِ هسته‌ای   
iveš-e haste-yi

Fr.: fusion nucléaire   

A → nuclear reaction between atomic nuclei as a result of which a heavier → atomic nucleus is formed, a small fraction of mass is lost, and a large quantity of energy is released. Nuclear fusion is the source of the energy of stars.

nuclear; → fusion.

nuclear magnetic resonance (NMR)
  باز‌آوایی ِ مغناتیسی ِ هسته‌ای   
bâzâvâyi-ye meqnâtisi-ye haste-yi

Fr.: résonance magnétique nucléaire   

An analysis technique applied to some atomic nuclei that have the property to behave as small magnets and respond to the application of a magnetic field by absorbing or emitting electromagnetic radiation. When nuclei which have a magnetic moment (such as 1H, 13C, 29Si, or 31P) are submitted to a constant magnetic field and at the same time to a radio-frequency alternating magnetic field, the nuclear magnetic moment is excited to higher energy states if the alternating field has the specific resonance frequency. This technique is especially used in spectroscopic studies of molecular structure and in particular provides valuable information in medicine that can be used to deduce the structure of organic compounds.

nuclear; → magnetic; → resonance.

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