geodesic

adjective
  1. relating to or denoting the shortest possible line between two points on a curved surface
  2. Usage: mathematics; geometry
  3. relating to geodesy or the measurement and mapping of the earth
  4. Usage: geography; surveying
noun
  1. the shortest line between two points on a curved surface
  2. Usage: mathematics; geometry
  3. a structure made of straight elements forming triangles or polygons
  4. Usage: architecture; engineering

Examples