Nautical \Nau"tic*al\, a. [L. nauticus, Gr. naytiko`s, fr. nay`ths a seaman, sailor, fr. nay^s ship: cf. F. nautique. See {Nave} of a church.] Of or pertaining to seamen, to the art of navigation, or to ships; as, nautical skill. [1913 Webster] Syn: Naval; marine; maritime. See {Naval}. [1913 Webster] {Nautical almanac}. See under {Almanac}. {Nautical distance}, the length in nautical miles of the rhumb line joining any two places on the earth's surface. {nautical mile}. See under {Mile}. [1913 Webster]