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Pergola
Pergolo
Perhaps
Peri
Peri-
Periactin
Periagua
perianal
Perianth
Perianthium
periapsis
Periapt
periarterial plexus
periarteritis
periarteritis nodosa
Periastral
-- Periastron --
Periauger
Periblast
Periblem
Peribolos
Peribranchial
Pericallis
Pericallis cruenta
Pericallis hybrida
Pericambium
Pericardiac
pericardial
pericardial cavity
Pericardial fluid
pericardial sac
pericardial space
pericardial vein

Periastron

Per`i`as´tron
n.1.(Astron.) That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.

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