The Collaborative International Dictionary of English v.0.48:

Synodal \Syn"od*al\, a. [L. synodalis: cf. F. synodal.]
   Synodical. --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Synodal \Syn"od*al\, n.
   1. (Ch. of Eng.) A tribute in money formerly paid to the
      bishop or archdeacon, at the time of his Easter
      visitation, by every parish priest, now made to the
      ecclesiastical commissioners; a procuration.
      [1913 Webster]

            Synodals are due, of common right, to the bishop
            only.                                 --Gibson.
      [1913 Webster]

   2. A constitution made in a provincial or diocesan synod.
      [1913 Webster] Synodic