synodic
1. Of or relating to a synod; synodal
2. usually synodic [Greek synodikos, from synodos meeting, conjunction]; relating to conjunction; especially; relating to the period between two successive conjunctions of the same celestial bodies (as the moon and the sun)
synkaryon · synkinesia · synkinesis · synod · synodal · synodic · synodical · synodic month · synodic period · Synod of Whitby · Synodontidae