# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13 Search : weight
 atomic weight   وزن ِ اتمی   vazn-e atomi (#)Fr.: poids atomique   → atomic; → weight. counterweight   پارسنگ   pârsang (#)Fr.: contrepoids   A weight that balances another weight.→ counter-; → weight.Pârsang "a make-weight," from pâr-, a variant of pâd-, → counter-, + sang a variant of sanj, sanjidan "to measure; compare, put in balance," → object; alternatively, pârsang "a piece of stone," from pâr, short for pâré "piece, part," + sang, → stone, meaning "weight." makeweight   پارسنگ   pârsang (#)Fr.: contrepoids   Something put in a scale to complete a required weight.→ make; → weight.Pârsang, → counterweight. mean molecular weight   وزن ِ مولکولی ِ میانگین   vazn-e molekuli-ye miyângin (#)Fr.: poids moléculaire moyen   The total atomic or molecular weight divided by the total number of particles. For instance, the mean molecular weight of a plasma of pure ionized 4He would be 4 (the atomic mass number) divided by 3, the total number of particles (1 nucleus plus 2 electrons), i.e. 4/3.→ mean; → molecular; → weight. molecular weight   وزن ِ مولکولی   vazn-e molekuli (#)Fr.: poids moléculaire   The sum of the atomic weights of all the atoms in a molecule.→ molecular; → weight. statistical weight   وزن ِ آماری   vazn-e âmâriFr.: poids statistique   1) Statistics: A number assigned to each value or range of values of a given quantity, giving the number of times this value or range of values is found to be observed. 2) Statistical mechanics: A multiplicative factor in the expression for the probability of finding a system in a given quantum state. Usually the number of degenerate substates contained in the state.→ statistical; → weight. weight   وزن   vazn (#)Fr.: poids   1) The force of attraction of the Earth on a given mass. → molecular weight; → weightlessness. 2) Statistics: A measure of the relative importance of an item in a statistical population. → weighted mean. See also: → atomic weight, → counterweight, → mean molecular weight, → molecular weight, → statistical weight, → weight concentration, → weight fraction, → weight of a tensor density, → weight-fraction concentration, → weightlessness.M.E., from O.E. gewiht, cf. O.N. vætt, O.Fris. wicht, M.Du. gewicht, Ger. Gewicht.Vazn, loan from Ar. wazn. weight concentration   دبزش ِ وزنی   dabzeš-e vazniFr.: concentration en poids   of a gas included in the composition of a → gas mixture, the ratio of mass of this gas to the mass of the whole mixture. Same as → weight fraction and → weight-fraction concentration.→ weight; → concentration. weight fraction   برخه‌ی ِ وزنی   barxe-ye vazniFr.: fraction en poids   Same as → weight concentration.→ weight; → fraction. weight of a tensor density   وزن ِ چگالی ِ تانسور   vazn-e cagâli-ye tânsorFr.: poids d'une densité de tenseur   A constant the value of which is characteristic for any given → tensor density.→ weight; → tensor; → density. weight-fraction concentration   برخه‌ی ِ وزنی ِ دبزش   barxe-ye vazni-ye dabzešFr.: concentration en poids   Same as → weight concentration.→ weight; → fraction; → concentration. weighted mean   میانگین ِ وزنی   miyângin-e vazni (#)Fr.: moyenne pondérée   An mean which is obtained by combining different numbers according to the relative importance of each.→ weight; → mean. weightlessness   بی‌وزنی   bivazni (#)Fr.: apesanteur   The phenomenon experienced by a body when there is no force of reaction on it. This happens when the body is in → free fall in a → gravitational field or when the net force on it is zero.From → weight + -less suffix meaning "without" + -ness a suffix of quality or state.Bivazni, from bi- "without," → a-, + vazn, → weight, + -i.