Source : Webster's Revised Unabridged Dictionary (1913)

Antipodal \An*tip"o*dal\, a.
   1. Pertaining to the antipodes; situated on the opposite side
      of the globe.

   2. Diametrically opposite. ``His antipodal shadow.''
      --Lowell.

Source : WordNet®

antipodal
     adj : relating to the antipodes or situated at opposite sides of
           the earth; "antodpodean latitudes"; "antipodal regions
           of the earth"; "antipodal points on a sphere" [syn: {antipodean}]
     n : the relation of opposition along a diameter [syn: {antipodal
         opposition}, {diametrical opposition}]