Ranunculoid
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An Epicycloid with 
cusps, named after the buttercup genus Ranunculus (Madachy 1979).
References
Madachy, J. S. Madachy's Mathematical Recreations. New York: Dover, p. 223, 1979. Pickover, C. A. Keys to Infinity. New York: Wiley, pp. 79-80, 1995.
- Epitrochoid Evolute
- Epsilon
- Epsilon-Neighborhood
- Epstein Zeta Function
- Equal
- Equal by Definition
- Equal Detour Point
- Equality
- Equally Likely Outcomes Distribution
- Equal Parallelians Point
- Equiaffinity
- Equiangular Spiral
- Equianharmonic Case
- Equi-Brocard Center
- Equichordal Point
- Equichordal Problem
- Equidecomposable
- Equidistance Postulate
- Equidistant Cylindrical Projection
- Equidistributed Sequence
- Equilateral Hyperbola
- Equilateral Triangle
- Equilibrium Point
- Equilic Quadrilateral
- Equinumerous