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synodic

adjective syn·od·ic \ sə-ˈnä-dik \
variants: or synodical play \sə-ˈnä-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

in the meaning defined at sense 1

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