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\begin{figure}\begin{center}\BoxedEPSF{maclaurin_trisectrix.epsf scaled 700}\end{center}\end{figure}

A point where a curve intersects itself so that two branches of the curve have distinct tangent lines. The Maclaurin Trisectrix, shown above, has a crunode at the origin.

See also Acnode, Spinode, Tacnode

© 1996-9 Eric W. Weisstein