cyclide
cyclide cy"clide (s?"kl?d), n. [Gr. ky`klos circle.] (Geom.) A surface of the fourth degree, having certain special relations to spherical surfaces. The tore or anchor ring is one of the cyclides. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • cyclide — noun Any of a class of surfaces, described by quartic expressions, that are related to spherical surfaces …   Wiktionary

  • cyclide — (si kli d ) s. f. Terme de géométrie. Sorte de surface nommée ainsi par Ch. Dupin. ÉTYMOLOGIE    En grec, cercle …   Dictionnaire de la Langue Française d'Émile Littré

  • cyclide — …   Useful english dictionary

  • Dupin cyclide — A Dupin cyclide In mathematics, a Dupin cyclide or cyclide of Dupin is any geometric inversion of any standard torus. In particular, the standard (or circular) tori are themselves examples of Dupin cyclides. They were discovered by (and named… …   Wikipedia

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  • Orthogonal coordinates — In mathematics, orthogonal coordinates are defined as a set of d coordinates q = (q1, q2, ..., qd) in which the coordinate surfaces all meet at right angles (note: superscripts are indices, not exponents). A coordinate surface for a particular… …   Wikipedia

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