synodic

• ⇰ Of or pertaining to a synod; transacted in, or authorized by, a synod; <as>as, <ex>synodical</ex> proceedings or forms</as>.
• ⇰ 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>as, a <ex>synodical</ex> month (see <ex>Lunar month</ex>, under Month>); the