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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

<< < -ne nan nat nea neg Ner neu New New Nic nod non non non nor nuc nuc num nut > >>

Number of Results: 368
nuclear waste
  آخال ِ هسته‌ای   
âxâl-e haste-yi (#)

Fr.: déchets nucléaires   

A particular type of radioactive waste that is produced as part of the nuclear fuel cycle. These include extraction of uranium from ore, concentration of uranium, processing into nuclear fuel, and disposal of byproducts.

nuclear; → waste.

nucleon
  هستون   
haston

Fr.: nucléon   

A constituent of the atomic nucleus, i.e. a proton or a neutron.

From nucle(us), → nucleus, + -on a suffix used in the names of subatomic particles, probably extracted from → ion.

Haston, from hast(é)nucleus + -on, as above.

nucleonics
  هستونیک   
hastonik

Fr.: nucléonique   

The practical applications of nuclear physics, and the techniques associated with those applications.

From → nucleon + → -ics.

nucleosynthesis
  هسته‌هندایش   
haste-handâyeš

Fr.: nucléosynthèse   

The process by which → nuclear reactions at very high temperatures and pressures produce the various → chemical elements of the → periodic table, either in the → Big Bang or in stellar interiors. See also → primordial nucleosynthesis, → stellar nucleosynthesis, → explosive nucleosynthesis.

From nucleo-, combining form of → nucleus + → synthesis.

Haste-handâyeš, from hasténucleus + handâyešsynthesis.

nucleosynthesize
  هسته-هنداییدن   
haste-handâyidan

Fr.: nucléosynthétiser   

Produce through → nucleosynthesis.

nucleosynthesis; → -ize.

nucleosynthetic
  هسته‌هندایشی   
haste-handâyeši

Fr.: nucléosynthétique   

Of, pertaining to, proceeding by, or involving → nucleosynthesis.

Adj. of → nucleosynthesis.

nucleosynthetic era
  دوران ِ هسته‌هندایش   
dowrân-e haste-handâyi

Fr.: ère nucléosynthétique   

The era following the leptonic era, between 1 second and 1000 seconds after the Big Bang, when neutrons were abundant and helium and deuterium were synthesized.

nucleosynthetic; → era.

nucleosynthetic process
  فراروند ِ هسته‌هندایشی   
farâravand-e haste-handâyeši

Fr.: processus nucléosynthétique   

A process involving → nucleosynthesis, such as → r-process and → r-process.

nucleosynthetic; → process.

nucleus
  هسته   
hasté (#)

Fr.: noyau   

1) Core of an atom, where most mass and all positive charge is concentrated. It consists of protons and neutrons.
2) Of a comet, the stellar-appearing frozen core, containing most of the cometary mass, in the head of a comet.

From L. nucleus "kernel," from nucula "little nut," diminutive of nux "nut," from PIE *knu(k) "lump" (cf. M.Ir. cnu, Welsh cneuen, M.Bret. knoen "nut," O.N. hnot, O.E. hnutu "nut").

Hasté, variants asté "kernel, fruit stone," ostoxân "bone," from Mid.Pers. astak "fruit stone, bone," ast "bone;" Av. ast- "bone;" cf. Skt. asthi- "bone;" Gk. osteon; L. os; Hittite hashtai-; PIE base *os-.

nuclide
  هسته‌وار   
hastevâr

Fr.: nucléide   

A species of atom characterized by the constitution of its nucleus, i.e. by the numbers of protons and neutrons it contains.

From nucl(eo), → nucleus, + -ide, from Gk. eidos "shape."

Hastevâr, from hasté, → nucleus, + -vâr a suffix meaning "resembling, like," from Mid.Pers. -wâr, Av. -vara, -var, cf. Skt. -vara.

null
  ۱) نول؛ ۲) نولیدن   
1) nul; 2) nulidan

Fr.: 1) nul; 2) rendre nul   

1a) General: Being or amounting to nothing; nil; nonexistent; without value, effect, or significance.
1b) Math.: Of a set, empty. Of measure zero.
1c) Electronics: A point of minimum signal reception, as on a radio direction finder or other electronic meter.
2) To make null; cancel.

From M.Fr. nul, from L. nullus "not any, none," from ne- "not, no" → non- + illus "any," dimunitive of unus "one."

Nul, from na-, → non-, + -ul a variant of the Pers. suffix → -al. Nulidan, infinitive from nul.

null geodesic
  کهین‌ره ِ نول   
kehinrah-e nul

Fr.: géodésique nulle   

1) The path taken by a light ray in a curved → space-time just as a → timelike geodesic describes the path of a material particle.
2) A → geodesic of length zero.

null; → geodesic.

null hypothesis
  انگاره‌ی ِ نول   
engâre-ye nul

Fr.: hypothèse nulle   

Statistics: The assumption of the absence of a particular pattern in a set of data. The null hypothesis, denoted by H0, is put forward to be rejected in order to support an → alternative hypothesis.

null; → hypothesis.

null lens
  عدسی ِ نول   
adasi-ye nul

Fr.:   

A lens used in the optical testing of an aspheric surface. It converts a spherical wavefront into one that precisely matches the surface under test. When the wavefront is reflected from that surface, it reverses its path and, if the surface is perfect, results in a perfect emerging spherical wavefront, which is easily evaluated.

null; → lens.

null matrix
  ماتریس ِ نول   
mâtris-e nul

Fr.: matrice nulle   

An m × n matrix whose elements are all zeros. Also known as zero matrix.

null; → matrix.

null method
  روش ِ نول   
raveš-e nul

Fr.: méthode de zéro   

A method of comparing, or measuring, forces, electric currents, etc., by so opposing them that the pointer of an indicating apparatus remains at, or is brought to, zero, as contrasted with methods in which the deflection is observed directly. Same as zero method.

null; → method.

nuller
  نولگر   
nulgar

Fr.:   

A device using the → nulling interferometry technique.

Agent noun of the verb → null.

nulling fraction (NF)
  برخه‌ی ِ نولش   
barxe-ye nuleš

Fr.: fraction de phase d'arrêt   

The fraction of time that a → pulsar undergoes → pulse nulling. For most → nulling pulsars this fraction can range from zero (for the → Vela pulsar) to more than 50%.

null; → -ing; → fraction.

nulling interferometry
  اندرزنش‌سنجی ِ نولی   
andarzanešsanj-ye nuli

Fr.: interférométrie annulante   

A technique for blocking the light of a bright source in order to reveal a faint source near it. This technique uses destructive → interference between two or more → coherent beams from a number of telescopes to make the bright center dark. Nulling interferometry can be used to search the region immediately around a star for → extrasolar planets and → circumstellar dust clouds by suppressing the star's glare.

Nulling, from → null; → interferometry.

nulling pulsar
  پولسار ِ نولنده   
pulsâr-e nulandé

Fr.: pulsar à phase d'arrêt   

A → pulsar that undergoes → pulse nulling.

null; → -ing; → pulsar.

<< < -ne nan nat nea neg Ner neu New New Nic nod non non non nor nuc nuc num nut > >>