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Webster 1913 Edition

(s?′kl?d)

Noun.

[Gr.

κύκλοσ

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.

cyclide ‎(plural cyclides)

A Dupin cyclide

(mathematics) Any of a class of surfaces, described by quartic expressions, that are related to spherical surfaces