adj.
Pronunciation: s ə - ' nä-dik
Variant: or syn · od · i · cal \ -di-k ə l \
Function: adjective
Date: 1561
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)