geodesic curvature

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geodesic curvature

[¦jē·ə¦des·ik ′kərv·ə·chər]
(mathematics)
For a point on a curve lying on a surface, the curvature of the orthogonal projection of the curve onto the tangent plane to the surface at the point; it measures the departure of the curve from a geodesic. Also known as tangential curvature.