Having a southern aspect; southern; southerly. "Offices that require heat... should be meridional."
Meridional distance, the distance or departure from the meridian; the easting or westing.
Meridional parts, parts of the meridian in Mercator's projection, corresponding to each minute of latitude from the equator up to 70 or 80 degrees; tabulated numbers representing these parts used in projecting charts, and in solving cases in Mercator's sailing.