synodical

• HYPHEN: syn=od=i=cal

CIDE DICTIONARY

synodical, a. [L. synodicus, Gr. : cf. F. synodique.].

•  Of or pertaining to a synod; transacted in, or authorized by, a synod; as, synodical proceedings or forms.  Bp. Stillingfleet.  [1913 Webster]
•  Pertaining to conjunction, especially to the period between two successive conjunctions; extending from one conjunction, as of the moon or a planet with the sun, to the next; as, a synodical month (see Lunar month, under Month); the synodical revolution of the moon or a planet.  [1913 Webster]

OXFORD DICTIONARY

synodical, adj.
1 (also synodal) of, relating to, or constituted as a synod.
2 = SYNODIC.