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Webster 1913 Edition
Conchoid
Con′choid
,Noun.
[Gr. [GREEK]; [GREEK] shell +
εἶδοσ
form: cf. F. conchoïde
.] (Geom.)
A curve, of the fourth degree, first made use of by the Greek geometer, Nicomedes, who invented it for the purpose of trisecting an angle and duplicating the cube.
Webster 1828 Edition
Conchoid
CONCHOID
,Noun.