Found 2 items, similar to Magnetic meridian.
English → English (WordNet)
Definition: magnetic meridian
magnetic meridian
n : an imaginary line passing through both magnetic poles of the
Earth
English → English (gcide)
Definition: Magnetic meridian
Meridian
\Me*rid"i*an\, n. [F. m['e]ridien. See
Meridian, a.]
[1913 Webster]
1. Midday; noon.
[1913 Webster]
2. Hence: The highest point, as of success, prosperity, or
the like; culmination.
[1913 Webster]
I have touched the highest point of all my
greatness,
And from that full meridian of my glory
I haste now to my setting. --Shak.
[1913 Webster]
3. (Astron.) A great circle of the sphere passing through the
poles of the heavens and the zenith of a given place. It
is crossed by the sun at midday.
[1913 Webster]
4. (Geog.) A great circle on the surface of the earth,
passing through the poles and any given place; also, the
half of such a circle included between the poles.
[1913 Webster]
Note: The planes of the geographical and astronomical
meridians coincide. Meridians, on a map or globe, are
lines drawn at certain intervals due north and south,
or in the direction of the poles.
[1913 Webster]
Calculated for the meridian of, or
fitted to the meridian of
, or
adapted to the meridian of, suited to the local
circumstances, capabilities, or special requirements of.
[1913 Webster]
All other knowledge merely serves the concerns of
this life, and is fitted to the meridian thereof.
--Sir M. Hale.
[1913 Webster]
First meridian or
prime meridian, the meridian from which
longitudes are reckoned. The meridian of Greenwich is the
one commonly employed in calculations of longitude by
geographers, and in actual practice, although in various
countries other and different meridians, chiefly those
which pass through the capitals of the countries, are
occasionally used; as, in France, the meridian of Paris;
in the United States, the meridian of Washington, etc.
Guide meridian (Public Land Survey), a line, marked by
monuments, running North and South through a section of
country between other more carefully established meridians
called principal meridians, used for reference in
surveying. [U.S.]
Magnetic meridian, a great circle, passing through the
zenith and coinciding in direction with the magnetic
needle, or a line on the earth's surface having the same
direction.
Meridian circle (Astron.), an instrument consisting of a
telescope attached to a large graduated circle and so
mounted that the telescope revolves like the transit
instrument in a meridian plane. By it the right ascension
and the declination of a star may be measured in a single
observation.
Meridian instrument (Astron.), any astronomical instrument
having a telescope that rotates in a meridian plane.
Meridian of a globe, or
Brass meridian, a graduated
circular ring of brass, in which the artificial globe is
suspended and revolves.
[1913 Webster]