In general, any smooth curve joining two points. In particular, any portion (other than the entire curve) of a Circle
or Ellipse.

*See also *Apple, Circle-Circle Intersection, Five Disks Problem, Flower of Life, Lemon,
Lens, Piecewise Circular Curve, Reuleaux Polygon, Reuleaux Triangle, Salinon, Seed of
Life, Triangle Arcs, Venn Diagram, Yin-Yang

© 1996-9 *Eric W. Weisstein *

1999-05-25