natural zâstâri Fr.: naturel Occurring in nature; not artificially prepared. → nature. Adj. of → nature. |
natural frequency basâmad-e zâstâri Fr.: fréquence naturelle Any frequency of small-amplitude oscillation for a system with a position of stable equilibrium and in the absence of external forces. In other words, the frequency of → free oscillation. Also called characteristic frequency. |
natural history târix-e zâstâri Fr.: histoire naturelle The → sciences, as → botany, → mineralogy, or → zoology, dealing with the study of all objects in → nature: used especially in reference to the beginnings of these sciences in former times (Dictionary.com). |
natural language zabân-e zâstâri Fr.: langage naturel Linguistics: A language that has evolved naturally as a means of communication among people, as opposed to → artificial language and → formal language (Dictionary.com). |
natural line broadening pahneš-e zâstâri-ye xatt Fr.: élargissement naturel de raie The broadening of any spectral line due to the fact that excited levels have mean lives, which, by virtue of the uncertainty principle, implies a spread in the energy values. → natural; → line; → broadening. |
natural logarithm logâritm-e zâstâri Fr.: logarithme naturel The logarithm in which the → base is the → irrational number e = 2.718281828.... Also called → Napierian logarithm. The natural logarithm is denoted ln, an abbreviation of logarithmus naturalis. Natural logarithms are related to → common logarithms through: ln x = (1/M) log x, with M = (1/ln 10) ≅ 0.434294. |
natural number adad-e zâstâri Fr.: nombre naturel Either a member of the set of positive integers 1, 2, 3, ..., or the set of non-negative integers 0, 1, 2, 3, ... There seems to be no general agreement about whether to include 0 in the set of natural numbers. |
natural period dowre-ye zâstâri Fr.: période naturelle Of a body or system, the period of → free oscillation. |
natural resonance bâzâvâyi-ye zâstâri Fr.: résonance naturelle A resonance such that the period of the driving force is the same as the natural period of the system. |
natural satellite mâhvâre-ye zâstâri Fr.: satellite naturel A solar system → object that → revolves around a → primary body and is not man made. |
natural science dâneš-e zâstâri Fr.: science naturelle A science that deals with matter, energy, their interrelations and transformations, In other words, natural sciences are concerned with physical processes observable in nature. They can be divided into physical and biological sciences. |
natural units yekâhâ-ye zâstâri Fr.: unités naturelles Physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants (e.g. the speed of light, Planck's constant, Boltzmann's constant, etc.) are equal to unity. The use of natural units allows these constants to be omitted from mathematical equations, leading to simpler calculations. |
natural uranium urâniom-e zâstâri Fr.: uranium naturel Uranium as found in nature. It contains 0.7% uranium-235, 99.3% uranium-238, and a trace of uranium-234 by weight. |
supernatural abar-zâstâri Fr.: supernaturel 1) Of, pertaining to, or being above or beyond what is natural; unexplainable by natural;
abnormal. |