synodical

Syn*od"ic, Syn*od"ic*al, a. Etym: [L. synodicus, Gr. synodique.] 1. (Eccl.) Defn: Of or pertaining to a synod; transacted in, or authorized by, a synod; as, synodical proceedings or forms. "A synodical epistle." Bp. Stillingfleet. 2. (Astron.) Defn: 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.

---