law of non-contradiction
Fr.: principe de non-contradiction
Same as → principle of non-contradiction.
A prefix meaning "not."
From O.Fr. non-, from L. non "not," from Old L. noenum "not one;" in some cases perhaps from M.E. non "not" (adj.), from O.E. nan.
Nâ- "no, not," variants na, ni, ma- (prohibitive) "not;" from Mid.Pers. nê, ma "no, not;" O.Pers. naiy, nai "not;" Av. nôit, naē "not;" cf. Skt. ná "not;" cf. L. ne-, in-, un-; Gk. ni; Lith. nè; O.C.S. ne "not;" PIE *ne-.
Fr.: fonction non algébrique
A → transcendental function. Examples are: exponential, logarithmic, and trigonometric functions.
non-baryonic dark matter
mâde-ye siyâh-e nâbâriyoni
Fr.: matière noire non-baryonique
mâdde-ye nâbâriyoni (#)
Fr.: matière non-baryonique
Matter that, unlike the ordinary matter, is not made of baryons (including the neutrons and protons). It is proposed as a possible constituent of dark matter.
tâbeš-e nâhamdus (#)
Fr.: rayonnement incohrént
Radiation having waves that are out of phase in space and/or time; radiation which is not → coherent.
Fr.: non contingent
Fr.: milieu non dispersif
A medium in which the → phase velocity is independent of frequency.
hendese-ye nâ-oqlidosi (#)
Fr.: géométrie non-euclidienne
Any of several geometries which do not follow the postulates and results of Euclidean geometry. For example, in a non-Euclidean geometry through a point several lines can be drawn parallel to another line. Or, the sum of the interior angles of a triangle differs from 180 degrees. According to Einstein's general relativity theory, gravity distorts space into a non-Euclidean geometry.
non-hierarchical multiple system
râžmân-e bastâyi-ye nâpâygâni
Fr.: système multiple non hiérarchique
non-ideal magnetohydrodynamics (MHD)
meqnâtohidrotavânik-e nâ-ârmâni, ~ nâ-minevâr
Fr.: magnétohydrodynamique non idéale
A → magnetohydrodynamics approach dealing with → plasmas which is an improvement with respect to → ideal magnetohydrodynamics. Non-ideal magnetohydrodynamics allows for a drift between particles, redistributing the → magnetic flux and acting on both the → angular momentum and magnetic flux conservation issues.
cârcub-e nâlaxtinâk, ~ nâlaxtimand
Fr.: référentiel non inertiel, ~ non galiléen
Any frame of reference in which the law of inertia does not apply, such as in accelerating and rotating frames. For example, the Earth is a non-inertial frame because it is rotating about its axis. But the rotation is so slow that the associated acceleration is negligible compared to other accelerations commonly encountered in everyday life. However, the non-inertial nature of the Earth appears in, e.g., the → Coriolis effect. → inertial reference frame.
Fr.: non ionisé
Not ionized, → neutral.
non-local thermodynamic equilibrium (NLTE)
tarâzmandi-ye garmâtavânik-e nâmahali
Fr.: hors équilibre thermodynamique local
A physical condition in which the assumption of the → local thermodynamic equilibrium does not hold.
Fr.: matière non lumineuse
Not ordinary matter. Same as → dark matter.
non-principal axis (NPA) rotational motion
jonbeš-e carxeši be gerd-e âse-ye nâ-farin
Fr.: mouvement rotationnel autour de l'axe non-parincipal
Fr.: pulsation non-radiale
A type of stellar pulsation in which waves run in different directions on and beneath the surface of a star.
Fr.: processus non radiatif
An process in which an excited state returns to the ground state without emitting radiation. → radiative process.
Fr.: électron non-relativiste
An electron that does not experience relativistic effects since its velocity is very small compared to that of light.