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# Definition of: lemniscate

(lem**′**nis·kāt, -kit) noun Math.

The plane curve in the shape of a figure eight traced by the foot of a perpendicular drawn from the origin to a tangent to a rectangular hyperbola: the locus of the vertex of a triangle when the product of the two adjacent sides is maintained equal to 1/4 of the fixed, opposite side. Also called **Bernoulli's lemniscate.** [<NL *lemniscata*, orig. fem. of L *lemniscatus* adorned with ribbons <*lemniscus.* See LEMNISCUS.]

LEMNISCATE

A symmetrical tracing in polar coordinates.

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