D defs.my
Entry 2 senses Webster, 1913

Meridional

· Me·rid·i·o·nal · IPA /mɪˈɹɪdɪənəl/
01 a. Of or pertaining to the meridian.
  1. 1.
    Of or pertaining to the meridian.
  2. 2.
    Having a southern aspect; southern; southerly.
    “Offices that require heat . . . should be meridional.” Sir H. Wotton.
Phrases & compounds
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.