| Orthodromics | n. The art of sailing in a direct course, or on the arc of a great circle, which is the shortest distance between any two points on the surface of the globe; great-circle sailing; orthodromy. [ 1913 Webster ] |
| Orthodromic | a. [ Ortho- + Gr. &unr_; to run. ] Of or pertaining to orthodromy. [ 1913 Webster ] |