👉 In mathematics, a "chuckhole" is a mathematical object that represents a set of points on a plane or in space. It is named after the shape of the opening at the top of a brick, which resembles a "chuck". In general, a "chuckhole" is defined as the union of two or more disjoint closed curves (usually circles) and can be used to model various geometric shapes such as rings, spheres, cylinders, etc.