An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : pseudo-
pseudo-
  دروژ-   
doruž-

Fr.: pseudo-   

A combining form meaning "false, erroneous, pretended, unreal," used in the formation of compound words (pseudonym, pseudoclassic, pseudointellectual). In scientific use, denoting close or deceptive resemblance to the following element (pseudogene, pseudobulb, pseudocarp).
pseudo-disk, → pseudo-Euclidean space, → pseudo-nucleus, → pseudo-Riemannian space, → pseudoscience.

From Gk. pseudo-, combining form of pseudes "false," or pseudos "falsehood," both from pseudein "to lie, cheat, falsify."

Doruž-, from Mid.Pers. druž "false, untrue, deceptive" (Mod.Pers. doruq "lie"), drôzitan, druxtan "to lie;" O.Pers. drauga- "lie;" Av. drug- "to lie," družaiti "he lies, cheats;" cf. Skt. druhyati "he lies," drôha-, drôgha- "insult, injury," druh- "damage; ghost;" O.H.G. triogan "to deceive;" Ger. trügen "to deceive;" E. dream; PIE base *dhrugh- "to deceive, harm."

pseudo-bulge
  دروژ-کوژ   
doruž-kuž

Fr.: pseudo-bulbe   

A general designation for both → box-peanut and → disk-like bulges. Although both, as opposed to the → classical bulges, show important rotational support, they also have different properties.

pseudo-; → bulge.

pseudo-disk
  دروژ-گرده   
doruž-gerdé

Fr.: pseudo-disque   

A mass structure around a → protostar that resembles an → accretion disk, but is in fact a simple flattened envelope.

pseudo-; → disk.

pseudo-Euclidean space
  فضای ِ دروژ-اقلیدوسی   
fazâ-ye doruž-Oqlidosi

Fr.: espace pseudo-euclidien   

A real vector space of dimension n having a symmetric bilinear form (x, y) such that in some basis e1, ..., en, the quadratic form (x2) takes the form x12 + ... + xn - 12 - xn2. Such bases are called orthonormal.

pseudo-; → Euclidean; → space.

pseudo-nucleus
  دروژ-هسته   
doruž-hasté

Fr.: pseudo-noyau   

Same → false nucleus.

pseudo-; → nucleus.

pseudo-Riemannian space
  فضای ِ دروژ-ریمانی   
fazâ-ye doruž-Riemanni

Fr.: espace pseudo-riemannien   

A space with an affine connection (without torsion), at each point of which the tangent space is a → pseudo-Euclidean space (Encyclopedia of Mathematics, Kluwer Academic Publications, Editor in chief I. M. Vinogradov, 1991).

pseudo-; → Riemannian; → space.