:"Globose" redirects here. See also Globose nucleus. A sphere (from Greek σφαίρα - sphaira, "globe, ball,") is a symmetrical geometrical object. In non-mathematical usage, the term is used to refer either to a round ball or to its two-dimensional surface. In mathematics, a sphere is the set of all points in three-dimensional space (R3) which are at distance r from a fixed point of that space, where r is a positive real number called the radius of the sph… (More on Sphere)