syzygy
/ˈsɪzɪdʒɪ/noun
(pl. -ies)
1- Astronomy a conjunction or opposition, especially of the moon with the sun【天文】朔望：
the planets were aligned in syzygy.
在朔望时行星排成一行。
1.1
- a pair of connected or corresponding things一对相关的事物。
词源
early 17th cent.: via late Latin from Greek suzugia, from suzugos 'yoked, paired', from sun- 'with, together' + the stem of zeugnunai 'to yoke'.