hypersphere
multidimensional generalization of a sphere in Euclidean space; an n-dimensional object embedded in an (n + 1)-dimensional Euclidean space
en-US/ˈhaɪpɚˌsfiɹ/
multidimensional generalization of a sphere in Euclidean space; an n-dimensional object embedded in an (n + 1)-dimensional Euclidean space