Astrology. Of an aspect: exact (to within a minute or so). Opposed to platic.

Astronomy. = synodical, adj. 2.

Astrology and Astronomy (see conjunction, n. 3).

Astronomy. Pertaining to the conjunction of two heavenly bodies (see conjunction, n. 3); said esp. of the revolution, or period of revolution, of a…

= syzygial, adj.

Of heavenly bodies: In conjunction.

Pertaining to a syzygy or syzygies; having the character of a syzygy (senses syzygy, n. 1b, 3).