https://en.wikipedia.org/wiki/Geodesic
WebIn geometry, a geodesic (/ ˌ dʒ iː. ə ˈ d ɛ s ɪ k,-oʊ-,-ˈ d iː s ɪ k,-z ɪ k /) is a curve representing in some sense the shortest path between two points in a surface, or more generally in a Riemannian manifold.The term also has meaning in any differentiable manifold with a connection.It is a generalization of the notion of a "straight line".The noun geodesic and …