Noun
fibration (plural fibrations)
(algebraic topology) A continuous mapping satisfying the homotopy lifting property with respect to any space.
A fibration is called a covering morphism or covering of groupoids if further such an is unique. Source: Internet
Hopf coordinates The Hopf fibration can be visualized using a stereographic projection of ) direction, represented by the blue arrow, although the terms poloidal and toroidal are arbitrary in this flat torus case. Source: Internet