Definition of: syzygy

(siz′ə·jē) noun plural ·gies
1. Astron. One of two opposite points in the orbit of a celestial body when it is in conjunction with or opposition to the sun; especially, the points on the moon's orbit when the moon is most nearly in line with the earth and the sun.
2. The union of parts or organisms.
3. A dipody or group of two feet in one verse. [<LL syzygia <Gk., a yoke, conjunction <syzygos yoked, paired <syn- together + zeugnynai yoke <zygon a yoke]
—sy·zyg·i·al (si·zij′ē·əl) adjective
SYZYGY
S. Sun's rays. E. Earth. M1, M2. Syzygy of the moon.