Nautical twilight



noun

the period after civil twilight until the time when the center of the refracted Sun is more than 12 degrees below the horizon
Examples

Nautical twilight is when the brighter stars used for celestial navigation have appeared and the horizon may still be seen.

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  • Nautili

    [nawt-l-uh s, not-] /ˈnɔt l əs, ˈnɒt-/ noun, plural nautiluses, nautili [nawt-l-ahy, not-] /ˈnɔt lˌaɪ, ˈnɒt-/ (Show IPA), for 1, 2. 1. Also called chambered nautilus, pearly nautilus. any cephalopod of the genus Nautilus, having a spiral, chambered shell with pearly septa. 2. . 3. (initial capital letter) the first nuclear-powered submarine launched by the […]

  • Nautiloid

    [nawt-l-oid] /ˈnɔt lˌɔɪd/ noun 1. a mollusk of the subclass Nautiloidea, including nautiluses and many fossil species that were abundant in the Ordovician and Silurian periods. adjective 2. noting or pertaining to a nautiloid. /ˈnɔːtɪˌlɔɪd/ noun 1. any mollusc of the Nautiloidea, a group of cephalopods that includes the pearly nautilus and many extinct forms […]



  • Nautilus

    [nawt-l-uh s, not-] /ˈnɔt l əs, ˈnɒt-/ noun, plural nautiluses, nautili [nawt-l-ahy, not-] /ˈnɔt lˌaɪ, ˈnɒt-/ (Show IPA), for 1, 2. 1. Also called chambered nautilus, pearly nautilus. any cephalopod of the genus Nautilus, having a spiral, chambered shell with pearly septa. 2. . 3. (initial capital letter) the first nuclear-powered submarine launched by the […]

  • Nautophone

    [naw-tuh-fohn, not-uh-] /ˈnɔ təˌfoʊn, ˈnɒt ə-/ noun, Nautical. 1. an electrically operated horn for giving fog warnings.



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