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Webster 1913 Edition

Cardioid

Car′di-oid

,
Noun.
[Gr.
καρδιο-ειδήσ
heart-shaped;
καρδία
heart +
εἶδοσ
shape.]
(Math.)
An algebraic curve, so called from its resemblance to a heart.

Webster 1828 Edition

Cardioid

CARDIOID

,
Noun.
An algebraic curve, so called from its resemblance to a heart.

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