n. An orthographic projection of the sphere on the plane of
the meridian, the eye being supposed at an infinite distance, and in
the east or west point of the horizon.
n. An instrument of wood or brass, on which this projection
of the sphere is made, having a movable horizon or cursor; -- formerly
much used in solving some common astronomical problems.
n. A scale of the sun's declination for each day of the
year, drawn across the torrid zone on an artificial terrestrial globe.
