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1. Astronomy The point in an orbit around the planet Earth where the orbiting body is closest to the planet.
2. The analogous point in an orbit around a celestial body other than Earth. Not in technical use.

[French périgée, from Medieval Latin perigēum, from Late Greek perigeion : Greek peri-, peri- + Greek , earth.]

per′i·ge′al (-jē′əl), per′i·ge′an (-jē′ən) adj.
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This raises the question of whether floods are attributable to high perigean spring tides.
Perigean "supermoons," however, are only a little bit super.
Brian Moon is chief technology officer at Perigean Technologies (perigeantechnologies.
Overlapping of the cycles of spring and perigean tides every 206 days results in an annual progression of 1.
The perigean tides' effect on the number of icebergs really was incidental.
When the perigean and spring tides coincide in June and December, the diurnal inequality causes one of the daily tides to be especially strong.
The rare celestial combination first involved the convergence of a spring tide and a perigean tide.
Conversely where macro-tides prevail, the problem of protection is complicated, and never more so than during perigean spring tides (Wood 1976).
Indeed, in this region, high perigean tides levels can be anticipated at intervals of 1 month, 7 months, 4.