Linked from
The 10 pages that link to Meridian, each with the reason it gives.
GeodesicRelated: Each meridian is a great circle and therefore a spherical geodesic.
LongitudeBroader topic: Longitude measures position relative to a chosen meridian.
SundialRelated: A sundial’s noon alignment follows the local meridian.
Prime meridianNarrower topic: The prime meridian is the meridian assigned longitude 0°.
Nautical mileRelated: Meridians mark the north–south direction along which latitude is measured.
Circle of latitudeCompared with: Meridians cross circles of latitude at right angles on a globe.