syzygy
Pronunciation:
\ˈsi-zə-jē\
Function:
noun
Inflected Form(s):
plural syz·y·gies
Etymology:
Late Latin syzygia conjunction, from Greek, from syzygos yoked together, from syn- + zygon yoke — more at yoke
Date:
circa 1847
: the nearly straight-line configuration of three celestial bodies (as the sun, moon, and earth during a solar or lunar eclipse) in a gravitational system