Definition
Geodesical is simply an adjective form of "geodesic," meaning related to or characterized by geodesics or geodesy. If something is described as geodesical, it pertains to the shortest path on a curved surface, or the science of measuring the Earth's shape and gravitational field. It's not as commonly used as "geodesic" itself, but it serves to modify nouns with the appropriate context. Think of it as a more formal way to describe something having geodesic properties. It emphasizes the connection to the principles of geodesy.