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lemniscate

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lem⋅nis⋅cate

[lem-nis-kit, lem-nis-keyt, -kit]
–noun Analytic Geometry.
a plane curve generated by the locus of the point at which a variable tangent to a rectangular hyperbola intersects a perpendicular from the center to the tangent. Equation: r 2=2a2cosθ.


Origin:
1775–85; < L lēmniscātus adorned with ribbons. See lemniscus, -ate 1
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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