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Webster 1913 Edition
Cissoid
Cis′soid
,Noun.
[Gr. [GREEK] like ivy; [GREEK] ivy +
εἶδοσ
form.] (Geom.)
A curve invented by Diocles, for the purpose of solving two celebrated problems of the higher geometry; viz., to trisect a plane angle, and to construct two geometrical means between two given straight lines.
Webster 1828 Edition
Cissoid
CISSOID
,Noun.