Me-rĭd'i-on-al, a.

adjective

(Synop., § 130), a. [Fr. méridional, Pr., Sp., & Pg. meridional, It. meridionale, Lat. meridionalis, from meridies, midday. See supra.]

  1. Pertaining to the meridian.
  2. Having a southern aspect; southern; southerly. Wotton.

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.