Definition of synodic in English:

synodic

adjective

Astronomy
  • Relating to or involving the conjunction of stars, planets, or other celestial objects.

    • ‘The synodic conjunction of Earth with Jupiter was on the 9th of July 2008, centered in the July 6th through 12th hurricane window in my forecast above.’
    • ‘The next Northern Maximum declinational tide July 2nd will be in phase with the inductive effects of the synodic conjunction of Jupiter peaking on July 9th.’

Origin

Mid 17th century: via late Latin from Greek sunodikos, from sunodos (see synod).

Pronunciation

synodic

/səˈnädik/