Cyclide

• (n.) A surface of the fourth degree, having certain special relations to spherical surfaces. The tore or anchor ring is one of the cyclides.
Found on http://thinkexist.com/dictionary/meaning/cyclide/

Cyclide

Cy'clide noun [ Greek 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.
Found on http://www.encyclo.co.uk/webster/C/209
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