adj. Astron. relating to or involving the conjunction of stars, planets, etc. synodic period the time between the successive conjunctions of a planet with the sun.
[ LL synodicus f. Gk sunodikos (as SYNOD) ]
SYNODIC
Meaning of SYNODIC in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012