# Meaning of Cardoid

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• (geometry) An epicycloid with exactly one cusp; the plane curve with polar equation \rho = 1 + \cos\,\theta.
- The Nuttall Encyclopedia

Car"di*oid (?), n. [Gr. kardio-eidhs heart-shaped; kardia heart + e'i^dos shape.] (Math.) An algebraic curve, so called from its resemblance to a heart.

- Webster's Unabridged Dictionary (1913)

You arrived here by searching for Cardoid
The correct spelling of this word ought to be: Cardioid

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