a. Astron. and Zool. [f. late L. sȳzygia SYZYGY + -AL.] Pertaining to a syzygy or syzygies; having the character of a syzygy (senses 1 b, 3).
1863. Fitz Roy, Weather Bk., xviii. 253. The moon’s greatest tidal action being syzygial, and the least at quadrature.
1873. C. W. Thomson, Depths of Sea, ix. 452. The first brachial is united to the second by a syzygial joint.
1879. Carpenter, in Trans. Linn. Soc., Ser. II. II. I. 48. The number of segments composing the syzygial interval is … three.
