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synodic

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adjective syn·od·ic \sə-ˈnä-dik\

variants: or

synodical

play \-di-kəl\

Definition of 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 (such as the moon and the sun)

First Known Use of synodic

1561

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