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n. pl. syz·y·gies
1. Astronomy
a. Either of two points in the orbit of a solar system body where the body is in opposition to or in conjunction with the sun.
b. Either of two points in the orbit of the moon when the moon lies in a straight line with the sun and Earth.
c. The configuration of the sun, the moon, and Earth lying in a straight line.
2. The combining of two feet into a single metrical unit in classical prosody.

[Late Latin sȳzygia, from Greek suzugiā, union, from suzugos, paired : sun-, su-, syn- + zugon, yoke; see yeug- in Indo-European roots.]

sy·zyg′i·al (sĭ-zĭj′ē-əl) adj.


n, pl -gies
1. (Astronomy) either of the two positions (conjunction or opposition) of a celestial body when sun, earth, and the body lie in a straight line: the moon is at syzygy when full.
2. (Poetry) (in classical prosody) a metrical unit of two feet
3. rare any pair, usually of opposites
4. (Zoology) biology the aggregation in a mass of certain protozoans, esp when occurring before sexual reproduction
[C17: from Late Latin syzygia, from Greek suzugia, from suzugos yoked together, from syn- + zugon a yoke]
syzygial, syzygetic, syzygal adj
ˌsyzyˈgetically adv


(ˈsɪz ɪ dʒi)

n., pl. -gies.
1. an alignment of three celestial objects, as the sun, the earth, and either the moon or a planet.
2. a measure in classical verse consisting of two feet, often of different kinds.
3. any two related things, either alike or opposite.
[1650–60; < Late Latin syzygia < Greek syzygía union, pair =sýzyg(os) yoked together (sy- sy- + -zygos, adj. derivative from base of zeugnýnai to yoke) + -ia -y3]
sy•zyg•i•al (sɪˈzɪdʒ i əl) syz`y•get′ic (-ˈdʒɛt ɪk) syz′y•gal (-gəl)
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.syzygy - the straight line configuration of 3 celestial bodies (as the sun and earth and moon) in a gravitational system
physical phenomenon - a natural phenomenon involving the physical properties of matter and energy
References in periodicals archive ?
A rare planetary alignment means Wales and the rest of Britain could face a year of super-tides and potential flooding along vast swathes of coastline, scientists have warned.
The reported Jovian-Plutonian gravitational effect, which is said to make people feel weightless for a short time during a planetary alignment, is going viral online, but unfortunately isn't true at all.
It might feel like a rare planetary alignment to those who started out their careers in the midst of a global recession, but annual salary growth maintaining a lead on inflation for three months on the trot is an excellent sign.
I am even prepared to entertain the notion that the cosmos might be sending us signals in every planetary alignment.
IN a rare planetary alignment, not only is Blood Brothers returning to a Liverpool stage this week (at the Empire for 10 days from tonight), but the original Mrs Johnstone is in town too.
The project aims not to land people on the surface of the red planet, but to take advantage of a rare planetary alignment that would allow a relatively easy, quick flyby around the Mars.
This historic 501-day journey around the Red Planet is made possible by a rare planetary alignment that occurs five years from now.
Bill tries to confront his cluster-qualm of living in a time of spectacular ignorance, and rare planetary alignment that may be part of the Mayan End of Days prophecy.
The ritual 'Shahi Snan' (Royal Bath) was timed to match an auspicious planetary alignment, when believers say spiritual energy flows to earth.
When two astrophysicists calculated that a planetary alignment would trigger a seismic disaster in 1982, they thought they were following the facts to their conclusion.
Even Nasa is getting in on the act, being forced to produce reams of scientific data debunking theories of mystery planets, polar shifts, solar flares, planetary alignment and rogue meteorites plummeting to Earth.
What happens if a planetary alignment occurs with all the planets being on one side of the solar system?