geodesic torsion

geodesic torsion

[¦jē·ə¦des·ik ′tȯr·shən] (mathematics) For a given point on a surface and a given direction, the torsion of the geodesic on the surface through the point and in the given direction. For a given curve on a surface at a given point, the torsion of the geodesic through the point in the same direction as the given curve.