. . "In mathematics, particularly differential geometry, a geodesic (/\u02CCd\u0292i\u02D0\u0275\u02C8di\u02D0z\u0268k/ JEE-o-DEE-zik or /\u02CCd\u0292i\u02D0\u0275\u02C8d\u025Bs\u0268k/ JEE-o-DES-ik) is a generalization of the notion of a \"straight line\" to \"curved spaces\". In the presence of an affine connection, a geodesic is defined to be a curve whose tangent vectors remain parallel if they are transported along it."@en . . .