Editing Meridian (section)

==Science==
* [[Meridian (astronomy)]], imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon
**[[Central meridian (astronomy)]]
* [[Meridian (geography)]], a longitude line, i.e. a line of constant [[longitude]], or in other words an imaginary arc on the Earth's surface from the North Pole to the South Pole
** [[Meridian arc]], the distance between two points with the same longitude
** [[Prime meridian]], origin of longitudes
** [[Principal meridian]], arbitrary meridians used as references in land surveying
* Meridian line, used with a gnomon to [[Sundial#Meridian lines|measure solar elevation and time of year]]
* [[Autonomous sensory meridian response]], a static-like or tingling sensation on the skin