01 a. Of or pertaining to a synod; transacted in, or authorized by, a synod; as, synodical proceedings or forms.
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1.
Of or pertaining to a synod; transacted in, or authorized by, a synod; as, synodical proceedings or forms.(Eccl.)
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2.
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.(Astron.) See: Month