vertical circles

The Sailor's Word-Book

Great circles of the sphere intercepting each other in the zenith and nadir, and cutting the horizon at right angles.

Related Words

  • circles

    , great, lesser, azimuth, vertical (which see). ...

    The Sailor's Word-Book

  • Vertical

    ·noun Vertical position; zenith. II. Vertical ·noun A vertical line, plane, or circle. III. Vertic...

    Webster's Dictionary of the English Language

  • azimuth circles

    See vertical circles. ...

    The Sailor's Word-Book

  • polar circles

    The Arctic and the Antarctic; 23° 28′ from either pole. ...

    The Sailor's Word-Book

  • prime vertical

    That great circle which passes through the zenith and the east and west points of the horizon. ...

    The Sailor's Word-Book

  • vertical angles

    Opposite angles made by two lines cutting or crossing each other, and are always equal. (See angle o...

    The Sailor's Word-Book

  • vertical fire

    In artillery, that directed upward at such an angle as that it will fall vertically, or nearly so, t...

    The Sailor's Word-Book

  • vertical force

    The centre of displacement is also that of the centre of vertical force that the water exerts to sup...

    The Sailor's Word-Book

  • vertical plan

    See orthographic projection. ...

    The Sailor's Word-Book

  • circles of longitude

    These are great circles passing through the poles of the ecliptic, and so cutting it at right angles...

    The Sailor's Word-Book

  • angle of the vertical

    The difference between the geographical and geocentric latitudes of a place upon the earth's surface...

    The Sailor's Word-Book