SYNODIC
Etymology
Adjective
synodic (not comparable)
of, related to or produced by a synod; synodal
(astronomy) Of or pertaining to the conjunction of two or more heavenly bodies
Source: Wiktionary
Syn*od"ic, Syn*od"ic*al, a. Etym: [L. synodicus, Gr. synodique.]
1. (Eccl.)
Definition: Of or pertaining to a synod; transacted in, or authorized by, a
synod; as, synodical proceedings or forms. "A synodical epistle." Bp.
Stillingfleet.
2. (Astron.)
Definition: Pertaining to conjunction, especially to the period between two
successive conjunctions; extending from one conjunction, as of the
moon or a planet with the sun, to the next; as, a synodical month
(see Lunar month, under Month); the synodical revolution of the moon
or a planet.
Source: Webster’s Unabridged Dictionary 1913 Edition