syzygy

 
Pronunciation: /ˈsɪzɪdʒi/

noun (plural syzygies)

  • 1 Astronomy a conjunction or opposition, especially of the moon with the sun: the planets were aligned in syzygy
  • 2a pair of connected or corresponding things.

Origin:

early 17th century: via late Latin from Greek suzugia, from suzugos 'yoked, paired', from sun- 'with, together' + the stem of zeugnunai 'to yoke'