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relational system râžmân-e bâzâneši Fr.: système relationnel A database management system in which a relational data structure is used. → relational; → system. |
relative bâzâni Fr.: relatif (adj.): Existing or having its specific nature only by relation to
something else; not absolute or independent. From M.E. relatif (n.), from O.Fr. relatif, from L.L. relativus "having reference or relation," from L. relatus, suppletive p.p. of referre "to refer," → relate. Bâzâni, from bâzân- present stem of bâzânidan, → relate, + -i adj. suffix. |
relative azimuth sugân-e bâzâni Fr.: azimut relatif The difference in → azimuth between the → Moon and the → Sun. |
relative dating senn-yâbi-ye bâzâni Fr.: datation relative A method of dating that can only tell us whether an event or object is older or younger than another event or object. In geology, different layers of rock are compared to determine an ordered sequence of events in geologic history. In contrast to → absolute dating, relative dating cannot give the actual age of a rock. See also → stratigraphy. |
relative density cagâli-ye bâzâni Fr.: densité relative The ratio of the density of a substance to the density of a given reference material. For a solid or liquid, it is the density (at 20°C) relative to the maximum density of water (at 4°C). For a gas is its density divided by the density of hydrogen (or sometimes dry air) at the same temperature and pressure. Also called → specific density. |
relative error irang-e bâzâni Fr.: erreur relative The → absolute error divided by the true value x, that is: Δx/x. The result may be expressed as a percentile and is useful when we want to determine the error relative to the value of the exact quantity. |
relative frequency basâmad-e bâzâni Fr.: fréquence relative Statistics: The number of the occurrences of an event divided by the number of observations. |
relative humidity nam-e bâzâni Fr.: humidité relative The amount of moisture in the air compared to what the air can "hold" at that temperature. It is given by the ratio of the partial pressure of water vapor in the mixture to the saturated vapor pressure of water at a specific temperature. |
relative invariant nâvartâ-ye bâzâni Fr.: invariant relatif A → relative tensor of order zero. |
relative permeability tarâvâyi-ye bâzâni Fr.: perméabilité relative → relative; → permeability. |
relative refractive index dišan-e šekasti-ye bâzâni Fr.: indice de réfraction relatif The ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other. → relative; → refractive; → index. |
relative sunspot number šomâr-e bâzâni-ye hurlak Fr.: nombre relatif de taches solaires Same as → Wolf number and → sunspot number. |
relative tensor tânsor-e bâzâni Fr.: tenseur relatif A generalized tensor concept that is characterized by a → Jacobian matrix of transformation raised to a power called → weight of a tensor density. In practice, only relative tensors of weight 1 or -1 are used. The product of a relative tensor of weight -1 by another tensor of weight 1 is an → absolute tensor. Same as → tensor density. |
relative vector bordâr-e bâzâni Fr.: vecteur relatif A → relative tensor of → order → one. |
relative velocity tondâ-ye bâzâni Fr.: vitesse relative For two objects A and B, the velocity which B, supposing itself at rest, assigns to A. |
relatively bâzânivâr, bâzânâné Fr.: relativement In a relative manner; in relation to something else. From → relative + -ly "-vâr, -âné." |
relativism bâzâni-bâvari Fr.: relativisme The belief that truth is relative and may vary from individual to individual, from group to group, or from time to time, having no objective standard. From → relative + -ism a suffix used in the formation of nouns denoting action or practice, state or condition, principles, doctrines, etc. Bâzâni-bâvari, from bâzâni, → relative, + bâvari, from bâvar "belief" (Mid.Pers. wâbar "beleif;" Proto-Iranian *uar- "to choose; to convince; to believe;" cf. Av. var- "to choose; to convince" varəna-, varana- "conviction, faith;" O.Pers. v(a)r- "to choose; to convince;" Skt. vr- "to choose," vara- "choosing"). |
relativist bâzâni-bâvar Fr.: relativiste An adherent or advocate of relativism. From → relative + -ist a suffix of nouns. Adj. from → relativism. |
relativistic bâzânigimand, bâzânivar Fr.: relativiste 1) Physics: Relating to the → relativity theory. From → relativist + → -ic. |
relativistic aberration birâheš-e bâzânigimand Fr.: aberration relativiste The aberration of light for an object moving with
→ relativistic speed. In contrast to the classical case,
the → Lorentz transformation between the
→ rest frame of the observer and that of the object
must be used. Relativistic aberration is expressed by the equation:
cos φ' = (cos φ - → relativistic; → aberration. |
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