ge·o·des·ic (jē'ə-dĕs'ĭk, -dē'sĭk)
adj.

1. Of or relating to the geometry of geodesics.
2. Of or relating to geodesy.

n.
The shortest line between two points on any mathematically defined surface.

[From GEODESY.]

---

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

---