syzygy
\SIZ-i-jee\
noun
1. Astronomy. an alignment of three celestial objects, as the sun, the earth, and either the moon or a planet: Syzygy in the sun-earth-moon system occurs at the time of full moon and new moon.
2. Classical Prosody. a group or combination of two feet, sometimes restricted to a combination of two feet of different kinds.
Quotes
There's going to be a syzygy Wednesday night. All the planets banded together on the same side of the sun.
-- Meg Waite Clayton, The Four Ms. Bradwells, 2011
Origin
Syzygy can be traced to the Greek term syzygía meaning "union, pair," which in turn derives from the Greek verb zeugnýnai meaning "to yoke." It entered English in the mid-1600s.
Dictionary.com
