Reuleaux

Reuleaux may refer to:
 * Franz Reuleaux (1829–1905), German mechanical engineer and lecturer
 * in geometry:
 * Reuleaux polygon, a curve of constant width
 * Reuleaux triangle, a Reuleaux polygon with three sides
 * Reuleaux heptagon, a Reuleaux polygon with seven sides that provides the shape of some currency coins
 * Reuleaux tetrahedron, the intersection of four spheres of equal radius centered at the vertices of a regular tetrahedron