synodic

Of or relating to a synod; synodal.

Relating to the period of time required for an object to complete a single orbital period, returning to the same position as observed from another object or position in space.

Same as synodical.

Of or pertaining to a synod; transacted in, or authorized by, a synod.

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

of, related to or produced by a synod; synodal

Of or pertaining to the conjunction of two or more heavenly bodies